From 70c4fbb69a961bfc22f8770fff7ac4ba30aa9781 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 16 Apr 2025 15:36:25 -0600
Subject: [PATCH 01/11] GODRIVER-3533 Optimize value reader and writer

---
 bson/marshal.go      |  5 +++-
 bson/unmarshal.go    |  2 ++
 bson/value_reader.go | 71 ++++++++++++++++++++++++++++++++++----------
 bson/value_writer.go | 10 +++++++
 4 files changed, 72 insertions(+), 16 deletions(-)

diff --git a/bson/marshal.go b/bson/marshal.go
index 21631d8156..f36ad45219 100644
--- a/bson/marshal.go
+++ b/bson/marshal.go
@@ -74,7 +74,10 @@ func Marshal(val interface{}) ([]byte, error) {
 		}
 	}()
 	sw.Reset()
-	vw := NewDocumentWriter(sw)
+
+	vw := getValueWriter(sw)
+	defer putValueWriter(vw)
+
 	enc := encPool.Get().(*Encoder)
 	defer encPool.Put(enc)
 	enc.Reset(vw)
diff --git a/bson/unmarshal.go b/bson/unmarshal.go
index 72870c10ab..bf97da23b1 100644
--- a/bson/unmarshal.go
+++ b/bson/unmarshal.go
@@ -43,6 +43,8 @@ type ValueUnmarshaler interface {
 // pointer, the pointer is set to nil without calling UnmarshalBSONValue.
 func Unmarshal(data []byte, val interface{}) error {
 	vr := newDocumentReader(bytes.NewReader(data))
+	defer releaseDocumentReader(vr)
+
 	if l, err := vr.peekLength(); err != nil {
 		return err
 	} else if int(l) != len(data) {
diff --git a/bson/value_reader.go b/bson/value_reader.go
index 678c47b106..04275c95a1 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -13,6 +13,7 @@ import (
 	"fmt"
 	"io"
 	"math"
+	"sync"
 )
 
 var _ ValueReader = &valueReader{}
@@ -29,13 +30,30 @@ type vrState struct {
 	end   int64
 }
 
+var bufioReaderPool = sync.Pool{
+	New: func() interface{} {
+		return bufio.NewReader(nil)
+	},
+}
+
+var vrPool = sync.Pool{
+	New: func() interface{} {
+		return &valueReader{
+			stack: make([]vrState, 1, 5),
+		}
+	},
+}
+
 // valueReader is for reading BSON values.
 type valueReader struct {
-	r      *bufio.Reader
-	offset int64
+	r  *bufio.Reader
+	ra io.ReaderAt // The underlying reader
 
-	stack []vrState
-	frame int64
+	poolReader bool // Set if r is from bufioReaderPool
+
+	offset int64
+	stack  []vrState
+	frame  int64
 }
 
 // NewDocumentReader returns a ValueReader using b for the underlying BSON
@@ -57,14 +75,33 @@ func newValueReader(t Type, r io.Reader) ValueReader {
 }
 
 func newDocumentReader(r io.Reader) *valueReader {
-	stack := make([]vrState, 1, 5)
-	stack[0] = vrState{
-		mode: mTopLevel,
-	}
-	return &valueReader{
-		r:     bufio.NewReader(r),
-		stack: stack,
+	vr := vrPool.Get().(*valueReader)
+
+	vr.offset = 0
+	vr.frame = 0
+	vr.poolReader = true
+
+	vr.stack = vr.stack[:1]
+	vr.stack[0].mode = mTopLevel
+
+	br := bufioReaderPool.Get().(*bufio.Reader)
+	br.Reset(r)
+	vr.r = br
+
+	return vr
+}
+
+func releaseDocumentReader(vr *valueReader) {
+	if !vr.poolReader {
+		return
 	}
+
+	bufioReaderPool.Put(vr.r)
+	vr.r = nil
+	vr.poolReader = false
+
+	vr.ra = nil
+	vrPool.Put(vr)
 }
 
 func (vr *valueReader) advanceFrame() {
@@ -253,14 +290,18 @@ func (vr *valueReader) appendNextElement(dst []byte) ([]byte, error) {
 		return nil, err
 	}
 
-	buf := make([]byte, length)
-	_, err = io.ReadFull(vr.r, buf)
+	buf, err := vr.r.Peek(int(length))
 	if err != nil {
 		return nil, err
 	}
+
 	dst = append(dst, buf...)
-	vr.offset += int64(len(buf))
-	return dst, err
+	if _, err = vr.r.Discard(int(length)); err != nil {
+		return nil, err
+	}
+
+	vr.offset += int64(length)
+	return dst, nil
 }
 
 func (vr *valueReader) readValueBytes(dst []byte) (Type, []byte, error) {
diff --git a/bson/value_writer.go b/bson/value_writer.go
index 57334a925d..cf6f1b292d 100644
--- a/bson/value_writer.go
+++ b/bson/value_writer.go
@@ -26,6 +26,16 @@ var vwPool = sync.Pool{
 	},
 }
 
+func getValueWriter(w io.Writer) *valueWriter {
+	vw := vwPool.Get().(*valueWriter)
+
+	vw.reset(vw.buf)
+	vw.buf = vw.buf[:0]
+	vw.w = w
+
+	return vw
+}
+
 func putValueWriter(vw *valueWriter) {
 	if vw != nil {
 		vw.w = nil // don't leak the writer

From 20145ad6f73ed50d31db10181552f26261730e08 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 16 Apr 2025 15:50:51 -0600
Subject: [PATCH 02/11] GODRIVER-3533 Remove uncessary additions to vr

---
 bson/mem.prof        | Bin 0 -> 13829 bytes
 bson/value_reader.go |  12 +-----------
 2 files changed, 1 insertion(+), 11 deletions(-)
 create mode 100644 bson/mem.prof

diff --git a/bson/mem.prof b/bson/mem.prof
new file mode 100644
index 0000000000000000000000000000000000000000..9890e4d60971f92fc0a9327104ca3331123b52b8
GIT binary patch
literal 13829
zcmV+gHu}jQiwFP!00004|ExTDd{jl!RFk7gNK%;y6e#d~y7GuRA)_GP+=_BZP*-;q
zhvX5W$xNJ?aP2i*as=d5Zb48E0lAbb%BiA60R=<^ML|VHMHdy7b@_hP{bq6iGUQwT
z7+zjiRoB&3)z$rcFirxBN5WwvDNfeLxTH84k0L2fCaC8`6vgo-NuU!Whc7}iUII=6
zGhPb(ULa&9OF&7|sAG-gKLjRGl2OMxA<T3s==gUUr#8+@RKT?{nUak<)^7<W$=Y<{
zw^52_9G*%r<7GT90tFU_b*ZjV$ND)TGg-!C3Z)pS)<Q5F$T-@6a+1PHz+qs<$wbUl
zC<&NGX-29w6f%=!A|j!YZZ$L0WjvM6{%Rqb@lxVYK*&sz5?$mnGOT}?C=;k`@>dJd
zjFWZHM#xN(b?_3p#K^F6%ygMZ3r`+f$jC|fYn+-W3F}ckqrUZhoS7~qO<lTGv6GBn
zXniDO18QK9b%a$=hfd8qrY5h8TeNI-u^}}y>RYS8OqWTtWVs$s!TowX1shQ#qrSBp
zT$j2M-@0;L*r-)2DG5aFxcG!bStqGcoD@`SrpshHJZ76Bo{B$c<W#(rE;TN*4m0t(
zbo_~JYCH`O>G3pdOpT4ptQ}yYOrh~%9*>iVex(@1Ce*~Z%*r)UrqY?6n--xNC)4p^
zHJXl1si|RD51J^`=v0{=bzw_2>cY$Ea>KN)G1Dbd*($A;3_PjTl7Uyy6$V+~vs%(=
z<d`oNXP4mY1f|wX@JhPUsBb-;;A-ef{84Nk!D1&S*G)-H!}Lb+QcyVAOqVX2GnJW+
zm-X<77OEcpiT-3<WgTLnGU#wrs33xiT!};4gom`LRVyjMl~F;9VK1TiuWKRd;{!^F
z`q+$`8K%|KL|KmxR~AuGdSvsEM>M5N>P5I>O7&@5R9SyPU=hBG50~<+EJFPX5fqsU
zhAKwRLaLa7<!(TmhG@AP;7BcZ1GLC8F0+O)2Sod~MP$j*98^+b1B$YnY&MV$Y3+Ij
zj+caUcon(uT4e>o=G5HCwB~@Tfh%cW=8CYPev)c8#B}9&kC^GQ5$zeRc}c}@0eSjM
zY5WeR7$+Oz-Aa`W@oKu-Fs!>wl$X)S4SG~f<Z9@W;c(n=<=Kgi>NdFaGKab}FO!Yw
z=<4Ol@fu+(GfrNLx0rGAGQ2{OZG_j*HO948R%VjC6y4-DuC;E?Op=#j7G)WRWt!=-
z32h&`O}SSCoT>S1O8cYyY4ykv$+K5{D%hHhn>1wxl#dxEN`sD%I-+7iW4u+(+8A3<
z3nSaQ#YA~IogSk{n>eC2K@WM1Y^$T0E=@Z9={IWbrub8BrPQW)9bIQ!YyD8$OqW;C
z%vGCJ#4vDzc6|e{r|S*F8lPaM%PXmDo*us(cg8FH%dsW3Gz@EfyqPZlL~G}4RQM*2
z*GtR9R@BP4!TOL5aTT4MzEWxL3hbhIzXDrRYvV>M%S73XN-KN3tBI@5=<rq3hI|rN
zt5#C7ak+WLm4CXb8T(3{6of8vCGX!qq4o#g&wUzd)vEA<7G}D%Xykg$>6Q4JmgGvj
ziEc6sYa2__oXXeg@ju~uJ^m-WnQk@=YaNeg(#$jL6!G#ZoTW8&72ZO(7=|^ywwW%k
zrlZp%l8zP#uEwsU-Qlfb)R?(ety)QStmc_lSK`%7m)FqId0#5sG{dD@H_h-?y44_S
zDTkeFX?`>;{hKK^bR|z%Fsk-z{KMj1bFC9;IDES4;AfgY3+HNT7T!j;8HRO&$Fu0z
z_j<fJzN5#R<Lz|2VOVeQY%OTh(g^?adA265<Sjpssr}BBEyI#()k>1?tQMMocD%VP
zayCt#_K|X)Ogz?D89x)-P#dGI^+jVdU3zH#hC^!nYFye#jbDxJsGZT)dajX~F0Z5V
zUwG-n%WH764ieX3dunfVuwG`Cucwh4HYf#Mi!bT%Yq2ABG&)%-jJ2fYV~!~2abr{E
zJZ`*$?lA7O>Y3@X6)pMcfSNrEU)RYn3p-P1qpdZBxxaz7eXPe@;I~>KE$}Y7%V=wT
z%?fEvQ}^kppN+fpcsAZmcN<--tvr4st^V<AMc;!nQj~Na>`GmYZr1R+t|l%yBpf#(
z%rUiYw&%L*uWDAWWvd%n->6;HOqVy&$x`ib*WoD5-*woXx*LWyjFa`vw5xozlKy)9
zS=S@iV-M<K++%%}Xr{|s=;Wra)Obr=thLh;ds0uMgSCjYcPq_2718cm9ae6msngad
zg|)(5rLb0*Lpeq-tGnxR4sv3Y3UX;T-F(Zfx7}KuXOy?o$yH1<PTqi7iogwcFWqb0
zXSq$3ZD{#^wpW~NjW?;$)_6bNZ`^0yXrgROo1)gbLWle%_fAvu$=jQ>X&Y4zuhw={
zx?L;(MqHtle<S{x{%mxyCbRO}(~|Xi{3e{FSL03i06k!IvEJjj(t*}4c~?n#GuBhA
z+>8&>gT|ef%S@LYY1{7_`xe}*qt-3>7y66Q#X1@1s#j6R#I<YRp`)@`v6(JA(cv8$
z?MB?nOQgOlas6d)DiPv3F(faI39S4(XvuG%Dd)HqN3(H~<gNHu`m6Df^-nWh-brP@
z>*3pQH4i7t+wfs}*m%fV&gh+K)8Z}4wzuQIwRpE<Z|ZG4VtvcLdl&6`UXQoIkMwvO
z^pe+j#M)WgM0q!@p06#@)(QG;u@ChzI$7B!$}Tjryi6&l9bT=J(++bf*T}OPnJBwb
z+4I^-+GA@q+8%APjlNcM6J<9#dO%ZdjrSsl<iv2Bxk?2ocih?euDiQ*?N(vRHfFl)
zPRBpy5Fal);5?Q!Np`?|$~W$@{ARlBL8pIUmx`AiaW)Sp%Z}KO`WYRpS!~IBXijNl
zky{9^%Up8b3ousAnAE+;Rn6+%6ZIT2QTC+r4<igdpem{g_=KJntdW^6bLiB!uP7^Z
z!rjSg33tK*Dli_kc5xNci^`tS0qzdm&_s>jfsfH+Mq6ub6Ej`jOM5;)sPON^sTpeg
zPAsHCqpdY8!%Ua=(YAHWOT4@m*Mrv9`pf1HRY4)A*S+^egF?I%G*`G9xT0$!p<zY1
z;1zK{EqPbd>Wm}xis+0*RAh9rPO{7VnO3jY<JaPHp6jwo3p(lkKUYx{$Dapi`@x7^
zrgMBqmk-jZU$rf+!8iC7%D>S3IoccU!hy;g?m{2=j9ymIOqYM9IUhx6%-~6@M3D!2
zJb2q*{#w;UXrg?G4u89T5!dQ><DH7;-RLL3QEas|)8)fdcA965mtF8F9T&Uc<Mg-@
zuqMQr>9RL%Tc^jnM%GSO3{ubtSo2vCkI?cXYt`E6hHEu`Hw;n8D6v*BzL!pZ7~y%6
z7P1e`+{(EzPIkxcilOe<pZXi7)!9s!xpaKUHbt;UWaH8U2hadxpw6s$G-tRTzXyNS
z9()fDqCv($>lgN5n~r|M+lx5a6MHG@J#jD%HU?TbCd$54epHX<;3H}@2meNYGX`1@
zo9Qy2_I$yk@v;|=V%kZv7yh08ZVa?aOqBg-PBhGAAh=AnIZRNC10Q<0_aojOS2gRC
zn`igU@2BG!7mNk8{mY2{yCLiBQ7YdM(dk~cV--RL4?lV?Lh14`Dqo-j;=MSRxl5M!
z;y>sgMi*-uOI}DvKV|M&a=jK4;zz%D1sAc86)Khzc%!tL>#HK#bds5hm-pcqP3u1V
zC;ihXwuUk-ADubD<8ktS?5p&2KmLpUWfWU^CQ3ieIi^SN##XAtFQ!wAS)@4mXM6}D
zv#$IzhJnIh1gt-sC?BWNN$e(Z@&OeD>&gdk2+$BPO04E)eHow=<MsH1c$FC^|ALn*
zDi7jNprH(PWoBLZ7aRsOjQ?WA25I@0h#%dhxCqhw&$I?|umHhzxhpX&!$Wzqm{#QT
zKV1BHAeftHhuAzE1H$Z~B~-THv<fSK#W}2sRQXpN4m2E$5nxSXgY~DAb2P|9IF><D
z<U{xb&=U&e0Tbl_Dxb*^aq?lj9U(JCK8z!QMk;`8GhGg(IbShr>{`Rw=HyC{FN`qR
zIwk!F4D8oYTPGZ6)|Z3m<OHpa-q=m)jQbdMWp5k>G>UcFwaWf~P=#1rnircW2h*AD
zS~-tkTcyfJa5T_pFbu1WiSloBW}_bW;w@_2i(`PsfMHrUn<)QIyQY7kqDCKdD}nl8
zDNrdGW5K${b(t$M3_~ZdW|JB>X*&3Ce^+TiDb+C3<v(cutoPI^&c)X_ex}M?90xQG
zj3>d`DqQtl^8FWJg{s)%Zg0}&ABuAhz5k@`Qx7QAJY3FOgH)M^<AKJ5F#)Wl39d`H
z*b{GtAE{MKHkAL2BL0icjMFu>joaBub)}6HfhK}+gY}535u?FoHKXL@`LC|s^sH@6
zmka}qpRBR_;!eg+k$rIz&?Ls*0j5h10Xn=)gP8akS0s%%060~g48st(s#!hF4>Ffw
zXH52#dLlGkawt&Q7dmz1V<}HmSLWknpvhp|XL-$ZISlC751%UC_fuQU6xk1_08Iho
zDX=`;Bydf8KU}9)t)%#&Fbr<gp0oK@v!NUgH0*U<=N90$I5S>8iaU6c6j^{z13eAK
zBi5F<%oO=3P6e9Ee{N;rMgW}&>muhd{EjV_A|JzPK+_oHTVcB76F^HwY58r%x$DwO
z^4A#-Bj5>$=#)hr2{eAh=W1yc>R6p33voKobTA&WKIdsi0hRr#YqMK%D(45691V2%
zvxtVco#ATiN`RFk?&NLgNEiiob{<_tY(tI#np3K|FT!WJUFgH-xD)Bu^=hgt!Wlp_
zz?ccvGYOfg(ucEvW~smD^K$j$Y@pdJ>o_j?N`a<+^{TQ#u?j^gvKXHMdIpR+V3FyP
zV}bTWxeW7)ZtP0T*m3YpwoB3&D21+Lt8nR(<A4tD->UTSIF8^#GF3i~bAjf9@hn(J
zgxOR+33Tl3mCF4C_za5>#KYW$38}c6Dg!tVXr4lt4VkGji1UHwgYg_#A9LId;qySx
zgK>{_m6<Nb15KTz<tR~sJVln^0-yy7fpgvjpkt+nm8AVSKV_!K{<simAsCCmx|`$7
zH+6Oo;gw!z96Sl*VFKK!7W&-URTqGz_uS3`FkNyY(7_|z4T+Zn@GCA3Qsn?#473=G
z7r<J^(RUKi!l<*~q&6xMTPGTqPlQR8+}kB51MPoG2Zw>UR0oHFxCCg43J&u*I3zmz
z961@J-v71WN^gi5F_$aBcy8$YQwb0@OqZMjG;FzEF@x~Gygf;ggK#O(QVx~B$D1zs
z6wuo5I9SHZ!Fqp`A_wC#pk)lQnAgVBK;!3qq|Ej=oXN#)s{9+i2=pQt%fXtI%zA|I
z=CQ2D#3}F;JPkKCN>urHEVD5csBFw}<r{y;wY<Sik$=Y(Kr6uLW-UrFU2+<)KRw4k
z@WUiz>;D5+0<BbYY)xV@Besg43e%!?GMmWhK)WV0a$Kd(S-kuwzM%>I6ITJPQiNVh
za@BK1^d+aW7M-}>M9u)(e&~?$mPXMAT)g}jJ|`7F|H9Qks}-4flF2w(Le8i}rm36>
zbnw8zYGe{*7_f{(PZ~eH1oV<3v|dyuG_w++MsgO=iJea?y$=Dr!%UDv0ax(;J%wMq
z4D>R`ns%9KJg^364H#>|`Xs^3kh6jIeEQTPG!x`7P`%2`G=5qKv`#@C0W(8B1GMcG
z4K*B8*vm}ir}aSV!Po%SU^7F`0op!A1C0RPUP|MqGN3XrUIA;oFf-&_pp(n?s|lX~
zJj4MYjh|ixdKHX~V0}>A)zp;;3pR(j<CHuLX2UZu2j)gyC0yIgkk0~@pW&F9AV&gj
z;^>~LpJ)>cTgGh916sI)6{9pVG7-V`Cs!hb!(r~`rE?g47Uor-ARLZUU}wgJx%qj1
zFrmQquN(@sYW)EixUO&|7%yyQuRjMdRgZ?5-T6S}Ur$l083p)a0<tYe0d5A`tb+9O
z3Ff8pIiT`VE!1eh6<{XFF@S5eB1Z#m0otOVmoxepz^y=Al_^)V;+_XuSYb*odsSu`
z`|@3!S?0rY@VujK#n|RHW`<k<bhN@|2Wlg@>bnvgoVcC~qTz{)h=oAI)~`_BSPFQX
zS`npy+km!#@fujynHh2s(DsurD@n%!?$x}H1$-Uobuiul>m6owF;LkF-W(>#aZ#@u
z2e=(*I~X0TG2pr~%7%-rd1vRl7Q!M}3|+fbW-3Fz0CcRJ16+c967*S5DnGpm^d{%K
z4_N<8fcEcW&J*N#(Cxo8etHY&EyemOhFS`AYO{u#04nKart;GcpdAY8e$yqF0i7;m
zpm;eE)D|q2AIgEs6-;;2C0_(Ox=zEC0^X>cGosXt7hnl2g=O&K+2XM7Gu9kucdDfO
zePCWHmjlfo#w9?4oCLUEm<e(+;AtIBCIP+;^tSSi{US4!hu#5thvom7m*xtfwZFck
ztTF}k?kbI+b^`5GR++`s%1WT}_Zcc)J_VSKEdEn~yMT5npesz5Tm^J$H)q^<`E&&4
zX~5k;yTN!DtOjO=Tn%)1s}2NH0XK1GOyj5bfZkJqU}c<{AzuPoxL89?i+aj5z&${F
z6jXWb%FAmxtboO^5>`RiZmZ#?h-0ed^)k@@S2U^VfG_9?rvvT<+N(&-<O$aRjjxz+
z5BoYr&63dbWmpp-s=R$I(ByZclHQ;;#1SK+<C1HkYqu(RuFIn^X<Q^}eyf0(8FC%a
zsdbv)8GutXzcT>$0qs-#KEeF12Rgk-LrnvG&*9hckA$A<V10z&ePA||8-PletW>Mh
zDXnG#wlfptEWqKq#JWzIbSB{YK<|UGAFQ^SX*~V`&<DUZ)-d*iGN8%7=?Zl=aGxwQ
zl^+fO9RTA)uo{^e@)e-6vHO%qJp))?S4FgE01pBk1mh4`+v=Jb@>QT+Pid$*fFEfn
zeggVPK^>~gDIt>8Q^vst7!PIe3cOm8-81AypcAigWtkx70{)j%LK;7P4D>N@ZFv;T
zMsgF-{>9p0&jMa!Cdhe!rMyB?`Nd(N!%F6>Gt+qF6QEC&%wu?kYz7*(fRPjAe83Tm
zmBvq>0)48WPI83U0<`@#-XkQ)=K#Oq=$6V)M}Us-M(TYIZd-w7Zqh){1HP?+o(DV%
zbd-TMaRt5&sB9Pm#Yr1&1T$T}26X!ENGtU^<oR9)+Ec3a_YB}$brD=wxe}ij;gK98
zF4+j1U^8rit*{MVgRZYfwH8h_o60wUj_<7E5Ybw@kD|UEX!RsbeF5M;ZJh;xp8<WQ
ztg}a1=dHNS!+5%saqxy?o$Zcw!ii=>`6kfn{cN3hxe&0>jISvF7Xp3`^trOpV`ek?
z7SQ+?s<3pHk9rVXO?l(xoROxy32#-Jl^X!kY$|sE&40HFrKoWIlyK#|HHZqgmsQu)
zm3ScIOV!Ux83#KYs^yL>yV(YB1FfFOZV)F+u(u-g4$!6w8@$Pc8dWs)>%0wR@QxzF
ztQDIL<xZgT^}0K-2=HbzUM^NiATx#k{sQO=uB&g#Oy&2-fQ~6$w=y&2E}%127ZrCR
zBBecdB6h+qHJ4MdHj}%7&Md2<hqE-=N@=vR=)2Dr-6h`zIx#L%qVGykvcCs(X1rG7
z3xIpHhr9szCD50O>v!wA8dU0u$G;2jf!>vntFcQCjT^H$%r#Vm_o(9-W;3}5XvzFP
z=Kbokc;Dmj9-*YnwijrA)NHxPTld6Cbw1JCy1go(M9jRow&{}lfJVNjUG{N2B9P<f
z`#_rx=<Mgj&n1ADoAGifV1F}SE{l{rO8~zD`bxzTBQur9zXtkRMTwHkR0cc_bX=v(
zo6K~%A834ZlgdjyLw*1>dHr4$JzoSI%bSZde)<OJ8>QC~lGPXKup}k#gZE)Sl)(p%
zcF}Aq4*;FmT}6G-C6JFCJw60lJw?y59Pl~bHl*>>w?N;jS>`308S)^|u&Eq&666ZN
z1v<E{0Q?T<JK%6XhI7Ippo6P*NwX6029-!w0-gXm0mk=WwKQGwBcM$SIHtu*6OXZ0
zUGig~sT=fSSPXbGGG82t=W4!I0q)j(tpfZ3=m*8u8;P#w6%N~A92`(a{}2vBk3;Yg
zT=g*=u2{9r<R?I<U#y~uvlhV(YUWRYPR)+aT+Z8uW|d-1y*J^LikZ|rpE?ScX1Y8A
zG&$;JI)rjepQs702Ar%#Sq=Dapnoe-#wYTHn20YX9)U7A>af1Kw%JI2#`@ua6E9x^
z>}n>+mjU;3`bp&%CxK2XN9&TA#v?xh{Ro_>_i)ns9BBC(Moy4x0N)TQ39kYC3Fs#U
zwT_{_06JQcw7##6Y|mpro1Tu?>LhojGUS&)Gmq|3Ubz-@M<b1&eg^tk3G+pq>&lAs
z<Jt(H!RPP=Y=vWNk}n;(!l`C6`4!N%<$r9F*2*Mb1D!rnWl~pTS2X7&kAtt2MZS&@
zPc&WfIMCWM?NsXk+bCyT2Y3qTl;ZO?Gedp@bmk*XcRk=?U1O~W`~~P21@v(oCxo+-
z+j01&VyX=JEzq_ZTE!ax%k=8l0Qf7=uS&(sSexGgt^HERj%DDiK3*E{X$Hyw_i6^p
z0DlAeO);=LPOow2h$Z=3_)e|y6OPMqi2NSt=wVIxd_n1MrN$qC=B(1Qy#lzNi;gsY
zIt_GM&9<&~HF3XJlO2a2DvSGXpykhKGOq%T)?{7<{14E76qymVtC>fa1plr~<RsAc
zZ#cRp$c=!dTJnv6zXScQN`Vn^rc3?^wB&t;;(B2ySGP@~&8?)AlklSx>X|gB))pqo
zpMbW##jz@$E4pjUIN6S`4wx?aGtjWHYZjpyFE;@;Q!V{Xfd2*hFBrY7My5-i0xDg)
zL4j-r?5{vJ1D*jo14bw79y4A30yH^#)_sRk?5{v4Dl{^N`7|nGQ|d<e34VrC@C$VP
z)zQIjj&Z*MZU2H@G(m3RdRr~cEr4M`VZrtB9_8oXIK9VY-Fqy9-y9-yxsp5$H1lIk
zWGnBp6_KrgLj(;`M799eB4OvKLN;#FbSIp4D1;3&L;eTo@M1nyPLSIG&!nlPvJG&k
zprOKOYn@IrGvx0;b0%w`*8pdwDxlW@hY1?SK>y+P+<$?#Eskn0PwD0i(DFT+zt;iz
zUPxvdKMfZ&T=BPx&-5$OSl$1?@9<yN)fvaf(aexxK_}jeQd#5lnj;G{IZ}0oh3?CS
zIcW_MH2(SLRH%9baHH1D8(g^42w^-StXJ46h6*a1&QS4kJ77r3wH<JzppgnFXu9Mu
zL2H+BD<WRL3CP#RQu$$&pi#mYEv&mummDtW=(1hPbKU~{v!e4B;21$;6wLi*h8!WN
zbjEJQ(GI{9Iu`HX4G5Jgpw9%aoOc@TRt0GC5HVB?6T`&_N36N*HBSgC9eY#}DF-~I
z>#cIYv4X}5W1O(Qkkz`NPejn!Uq%XAxc+U0{x;wtzD1SBPfrSZQW)cfwYRaEAx8;X
zGC@!B4&ZNkl6L?n2%4ZKIaQb2xe)`@;SfAhjB+MY>K`p==9fFwL^}cZ>iT6T;6y<a
z6^UKab%`r+#&wHWSUFlat?C|Th8!bk$yZ-5<i6xC!0Eb~ybExWph?2$W=%^rGi0ft
zvM)8zZosEB&~CuVf+jQ2_+&n#5H##01I0@Zj^M(aDmh!i7*Q(53KcuJT|Z9H@u}Jw
z-UW3!p2`nX1Wi%S(A&(APYT*|JSx}6QZ?+OHcK2L#)&5#J<R1T=XgQK-YHj(p-TM(
z`5s^ysdf4u;8TL0QhMJ&e5@5I<oVL&c!!Kyr4s~|&N`;lxd-q`j=HJ*^t7O-g)voF
zk5;q#1P6OA7qb%ul}3B(>r+&EpCoAe#@7{NdsW$$naU5-1WgmhbYUT1H;P=aj-Mzd
z30<`pn;CMlppnb?4nl(52e_R*IhCJg2$~^`f!1unkveknT(>B4@;upLD$LD`DT4N|
z)@`}>0q1eYGnJoa3YsbSnj^QUpAs~3mIm4nIGs-?Qu%3?pjiwwG2YCOPYWttx=JbM
z1HgB+ay|f@Eoind?y<JA=T8;1e75HK0N{T#&j$dX5%di6d`j@fnft@CR;?u06!DaJ
zTHJE0bE9OcxKSTggu~LzkkbV1pP||M5b#OO)`x&|1kGW#p5RlH>4HkX<H8_b9*i`?
z4g${Qt2cazcBN_|GsRl9lG3M$X=1uK&wMik&77#2KLq%bX8sW1vx1&w=BM&`a%F4H
zsAR2~f=-n2CI1BZ5#R!i{1M<hLGy%>Va?(jZnFd}naDtKvJO6|JY=?@VWW>P<b?Tm
ze388-Lq5YXOf&K^;3-Y(W5D@><})Kd34JE&R4jF7idkZ|c*fy|^UWMVrHeMI#eEoX
zH&aOCr{@GcCyeKX^)^?ea|M-7=F6N3@)N)v^;JOqgt?~$oN%_(H#6k39HunTr+}|&
zpico83R=iO8yIMwpyQvOQu7@FoTp2TBY=wpEfU6JVg1D3F<;P}w>8vJz;85HM*&|D
z^n!x=oVj{V(47BhsLudTvf0!4X^EgE3hI4!?B@lYDA!O&0e|LQPKI0{=<uuh<>!De
z>vZ%vAC=Hjg}Q{((LzD<*DzGP`~t90N&N-jGC|7}kk`zRiv;Z&uT5|Wa5^8uH*+QK
zOWHhyTQK$Jh`HifF;C1F&xz;70<lmmimW;obg`f%-*FX`Addm^&Ed>cetJ>Ri^2$S
zpDaVZAZXi0zJHM*zXW`jwUNqC%LOeLMu|4j5<$mSX+HJ=^7kFCt2nqiroZH&hZl<%
z1mEmbm$LfgE~(@NO9ic~2=OzLRT!1eb@*hMY6c`M)sdN-7~gZ+TPEn#$mi7({|fK`
zFYz>fS|MnKip}#_xEBQ--p&C$L4M6XsiN%HfGY*9R8Zfsl9vlQUXk+$t2$+cpp(Dz
z^^^p89Pk*MCzYR830lQ|eUzD4DQMG6QHj4}%{O)>hB2%(pS(=GD3*&AVr4|%>@uqa
zm2TuC-~{;%SN4jfZva;dS}phx_!}@A%GH8Kst;`v<hOvUgj$7O1^X@FOM+ffu&bEj
zOM;fq(_DPVF-|$jcYrSodYM_BDOAPh+>)%bN~{*M#Y>LvxwrhXpwmxl0w(}xvo2Hl
zX^o&YOkj#C;3LsHITF2Jj)=uRzDCgUmlh~{eDB18G=5quXss~T3F|v%b*-RH>!bGg
z9h9oq2^zLqzx;vwL`upZ0M`pzuZ(n<b-iBD%t_kd{|5YonM~uS4T3gkC^q;8LF1pE
zuh=*V_@kzEk`Ga-Oc<{SYYfvW6I4E0)A|bVFmG=&<ST*>zo@ma57dooUPcEp<__aS
z@_K8;TCq;77aK&GW7bz3`RDS)uL_#^a#a3b*cF;_&F^5pdKPxXDHQfbK?}d-N;yIP
z2soM9PUWXp1-&Ya`}odPhTJ4*>L|_NPk^Jeoqqz{C}<;_X(VfSv!K!nDax6Th7~TE
zxKV5pn;pKDJ8ltl{ESxqSNh<P`-kc)mRhxvlDAZnm3LH+m>F`bpgHq3%Flq$F|%p>
zv`Nq=Wr=aTsJ00@Sbb5wCTPhbEx|s(7n!+BE8Rh=vsG*pE5vJ+T=R87^M4tw?0E`s
z3RjJ({IprnW?`gSPjd2oL(u&Ha-%6h{=!F|%7OSv&=z5ARh4~)+%9O&#C3|)ue>`|
zP`?6h6SPejuL<iEyT+S>$}1w>`^;jqiYvzTUl(tP?c&YKQH*OCR!tkO*CO>%B40p@
z#JA#Vr5LY04rFs{GwpBc=({B6@UTigk}ls8bSipdu#Jk3k&7Kk@+}bvMmcF=X2=~}
zYw%V%fw$35#vw<QazTfkey!6Q_&dItf~xl!X>-@vA%28%6(5+#-Efvz5rO$i`rCr`
zM47r7_1@Ch%q4u1d^^Gv6AJS&aa2F?6V(i?H?AMw5p-}^bU~_fD-NU%q2zZed7-9d
zX2_j_Hm#eh?D-ova+E!P1AJZ3>%w?L=;N1Nf)2hgPeGjqJg&3-X~6A*whQA;VIAY>
zwOi1(-*mM958y{kE0v$#67&`?tq*y^cLnWV81>#I>>7<KOi*X1*d=z0cOB<t8@wlI
z;UrxY{to&ZkW_x!A!r8|g|G6|djy@CscY5$0zSuaEtQ|j1(kEHI<<DSGW0#M=R9R-
zy4)*h`FD|fsGU^NwolO7GS2VuvMYYbJ7vDx7fH&vS3F$2Pdwu7!S{3{mgTbSeL=&j
zs)XD2(e`ru`%zKRyj1QNw0-3$rRFn$>-io+Sm0JxWE#JDThQCWct=>Pc)uSOxKq$h
z_2L;;?FWJm@7Cx;1Ufa~5P`b{?NU%LacnyvXxm#FYN)^stg1AA+AV0ef_k2zJ`^<m
zCk-`B;CC8on80@hy{n+gc?Wb*(Av`s#oy6#kIrl)4+%OvfrCxF{#-Ue4i~sq$JyZm
z-xKs6$DB1h%SVEaPt-whguo#hXoSE$g7yewudrCGj|ELWv|5##PYC>tzh+3|r+tF<
z3FCcXebm~#R2~+z?aSo~YNWset<3~EN}zLOIa1($LHiZ-{??gkJoJH}57djvz|GZg
zTzEJKYuA49fjA&O6bHp2@sapg92R=DaE$y!(DJ=3ZvyM}C_As|O56rp#xN>=a!$m0
zW`_J!(Ee|th+&;8j|e*TZuI3ROs$zKNl{ZjNv==Dk#m#0b6VNbDKCD!VJ0=okbvRv
zvkQ^J;dzVEIv`qur<Nx^SnSQUJ@I`8h3udw#ameD&+YB+^QfI03VPym{UyGTCt1JM
zkSPVelAzr?0+Ou%)MJ+i?0kD*aaM4UFXSEQwla&ofuJ2|?)KROda5Chl~oc9WEJ{z
zy@gr%{;XgiH>(O#mO^po`#nvoyst#8upndyyoH{OssIYH`pX{7fG1T$x^w+S#RY}7
z$2>0+4q(1Niqqb~afj?+sKA$>Rp1NR0iU-pi(ll~#X)y3I~eM~4_&>X+<rNsK!Gpc
zbKTi<Fv2-0WGOQFe$S;2h&xzNR9t8)dhQ~oY6s87wF91|K&lY1GSxd)e&3S9!fxIo
z+k+0c+sbU$+}*Rp=eg?qO!l#Tx&4Z~fybEaE%|<Tk>8i^&+Fs%2lBJj^R;<_g8p_O
ztG_3!Ptfmkw~Juh>nrjGg8jUO?!G0y+?Jj@vhEGqfnZi~zz&A|K6ig_@bMCRa8?Jq
zzg_4rwgV2m{3uDLSHVGV=9}3_=Z6BHBS4_U*Ui(Q`m1a;X}0H*;2>YF+sf?W_ZK#I
z7Z><)3jG5-P0kjW;j)VT{z9Gs`LD`Y)!y_d33+aeMHvCR(DnxH4*uMdBHI`0X?yeR
zfTv^4G|}H%SYr1MC>qS=wXtvzwSuQz&1Nl$nlaz+X%owo=kow}wmaL?q>80_miT&j
z1Kz?yTYE{ir;($2Hbwh>-U459cX3Iu-<`HM&vV5enC<ZryF>+y8)9KGDpaR{zsRvl
zRiocwhdgP0I2^jWaoAFZyZmeh6i8NuQCh|_z0V#{%_TDWl=Lm|S4@>tFxd7O=a`Pc
zveYlzBTYY5aOjR@`T}1;NUe_>JPm>>P6as_loS-^aiqu(_y>5dJbP{jG^>vW<oVBq
zeg~sB(u`S|TDi^L{I3%eZ;ORTD^s~UqcKmc;P(Fye5TW}(B?%L>-@n`pd>fc-k)dZ
zHg|WhbNzYteY^r|x_mXg-b^Q#br+MTSebg}K!gQPo0=`-JSBiK+D$dof5CMg&#g7Y
z?PB}#L;XCr*8rVO7g;U;uN36*bg04f-r{20m)Ff67>f8$OcAD<|K>baP|U?d-$FY#
z<j(CM>gDNtu2de-5IWYgm(+9KxRvj@+xva}?La6tJ7}Bt8dPj|4=D8e3qt)m`}+E8
znhQ7~NB#Ha*pyl1Ek4H@s$nuJ@)lPtpzC8{pi{}<!Fma)h?iZ{nfsOu9^9LA7aPS@
z)hM~%!ouqB+Vi`HjG!x(PR$i7nhAIIxl)M(tft~w(wrCWP|p&d&kmd`COaUJe;KW9
zENZc;hF7)5?A(GPZ(+8lwWoC~B=Vy0TEFaPp6)e`PJO*4g`wUm=J(cq8wj#AF(r%8
zpkiAy5$IIn%VpO5d77b)v4~=2+C{~oL7lm#@9WLA9f#F?D7m`TOfE&Xx7sT(-3s5m
zxIEpercpmqf#>@@SI44=uDW8cTu)bV+{(4LGZ33770a-~t@}D|eTk}}R0YzvFK0Sc
zfSkA1>Z71oq<Ym6?++A&?AW~5SpW(n(A?druq4>8rkP!P?Es!!@zp*SRaav`F%n60
z9esHhA6`4E(5&Kota-NBuUyk{_sRr1)y&@=f)#!qW09k$4m5XosHwZ#N(IUWEn=}j
zo(>vXXEE(<6sX41p+-Ne*Pcd^v{2+N_6CCm`M%zLy}?j06lig-T0T(X3l$XEoYdHx
z8=e=tVo1&7&ap#Xy~Uk<dG^5AwxQexh-6_M)b6$ic{;_SqVt5t%3{aV7O*lO4f=gK
zxn9m>+zJ{P>g9jT_SJOFF}2=7O^&q}W7e|=hVIJg-c2=x0?pmty#8KauALL|hU}U)
zDC~hD#f<7aDPCe!NHtz~i^FD#HDhT>lt*y-W^wr6NR?W{c1uJW=0-~sQ<)WQGj!B!
z#kT%fZ@v88yrF{rc1=?(*QC93{ej|=VDDhDof|FEvSM*>%|Scf=f{Q+wC%i$l93U(
zHQ3%8v^}0!cw&rpIo-RpS3*_p*L7;{Zkv}ETTN7L!LdC%`$GP9C4FPf4y>E#f@OT(
z1hJ}O+kIHo9lY4KA5+CtjJv>dd3eAM+A;RteD(mxP?gq5Z1J+&IZ>Oc^un!M)=cHC
zdBE;lP*~_`es<5K3JSLXY;O^VE3?W#Ra)LW#qb}@r=xFdE3-lkI_SmbgFbtJVuB-z
z9V1RO1}MzfG+j{_DkQx<s`)O0%YJ7QQDwsxQ+D80>J-53{l46iK*08e3I{nn)v#&n
zRN&F56jN=;oJ6&G4qj>)+oN62C^s?fuB@u9FkP!DbH(gS+F?5e0{%d3nZdDxo+YM+
z73-`rmNJ{ib9c=O*@)TtbH^{Lt{4NCLQ(}iml&#l#QkgT{KpditL+TbzQW1s4w)DW
zj4FI6e!7(u7Dn3IyvxcdEXcJlNN%7?vidjIAF$n8CfyJAbiHT|YfAc;=_&I3z>)Dn
zvS~E^t8m&X1=pZAtTYm6t~GOU_*(RH?3-#BB{aQ?ZByhdqN}&KxjScox7gG8?A*d9
zC6UcTI{)Fe9E6ZRV8`0*>}ls01Ve#A+@j|vJHR=*tGBqLFBBN$X?xMu<${b)P!(0S
zXiSa5fHQdq-3ihGBM@Uzrp`a~gt6`ZIau`c>J+B~h5NdiM%93KK(#QDs?8a6_q2;`
zZ|GcoI|m~2FRLl0);cqO&dd;NC|5B-XZ7aJI_8ot7+Z>TLQ@2vi$WEmHHnzA2}_`G
zG!do!>{f1%JKJ+t&3sLX<ZM`?p}Nv3cQ1X)eWAd@etSOdvj1PQalg0bvtRGdj%^8@
zOS6nzzj~X@iFFrZNyk|It0Ju(%=H#WBIU&!OH<OnOivpw7T4D}`j;^yeGqka+3kX9
zStIISh3;fiM-kmTT`t=3G%@|lB(rRNxX996sF9?x^e^MOBW=GZKmUW2n&(_OV1{C9
z^sx8vEtf)jV1%DwZ%4y=k=8gDcn3t6<)zhqQ6*tL%?0Z`tup<q6vy#LN79SO<?!Ro
zd!d?K&!~UZyefV<)>6;i?~ZM|lj|=Y6wxkUJ<xIU_KS8uj#XK?{^A1NqKPTPGUt)G
zE7$P<lOr3oopp|EF695ryjG!RBcRS~^s~~Yr(I3UWQDGk+A0<rY!8J~VT_nI8;qx>
z>E&1G%8LWBrSM9)5py``7s{X71NARk(<yzs_j%OL4R!7io8p}muBUX0-zbHcj<)rs
zzs?;hTP!;kZEGiSf^TffvND6bML9>M-JxcSMv<#1v}5wL+<@&3+4uPiONt77{*qwZ
zK)@Sa#=+Rs{zu_8wwhIQ(Zw6cw{r@7`GvfgFNXhneFcw~RFWd%e6bp$(jjYmZ*D)k
zx!c)i)XWgvs>$u0%ak}rT_^^tpuyLPbeUgux8m#;Vrxfqvj=p|_eZupHT9#Se81kZ
z1k@fUCjaNd`t|{TFxbOe5b$)ancgZ*9L=g13LHv#?19~V_Wj;LQ67R$VsB7+_t?en
z&Fdb}wvEv$>>4^6L|mgXk(ly9Wzz<E|H`{ihi0rE8nJ0}cNf3^v6A8ldW>BceL>3!
zHF<V0H&D=rOOuk^kh(P*QxmaTv#cta*bUWdfd5>EN>PU5maf{Iw~Qs~c022`VN6$7
zqs>CTG!)TnY>|pRt-1iQ+VE^wx+qVKFj_S}L>wWeI!P~UJJN}8aAVvcv*^+Nd5#?l
z*@2FMK#m=H&<^-xQ@oWKRCv4qn)6w2yPWRbVl%Zy)X`AYC9&lPD>K*c%WIpL=b%O}
z8)_PN)+|sl&EDR;yg)^^?GlT>R#9Qw!otoWyC}#`*dxS>4B1Z4z;o9{Q|sz2j%2-F
zet%9se?Z@Z&AymGr`7wv4Rj98SQkl!mv>QtE`lCYpsS+ap56gD>Yl68vXc&CPG(V0
zkIm1j%zXB=cgAAR%6USo!45?4Z8>W-wv5BvI0ptb<b^3jRiJ6)c=?Ns%F2u>`!OY*
zn;niSQ>c=i^9ll?L0$a0kJ)*#?d#8TfkUfGFYp)>Tg6RIUC48fSa&^wHL!nA?|{hS
zcHAze(-qcKROi(Qq(yGf<ob(wTj!}Cd7<QVM=#C9+-h~KQEi?-<rjqdmGt2ciL&zj
z{`^8aE8l-@Zc%YoZc#C3XMLZf$9dvrzCWw@G5&fcFYA1S+VpSXZsl&l^s;jOMaABL
zDv~chA3OuPI~4Tod%>ojDh1UC0DM`Zpl?AgqiGAYs6iu)=|wM%=qoVMvNWa}7~I3T
z+aAPRc<zoR0<Z@-2mAU&n>#so+k^NYZD;=8=(^Zl(m8TaxO!PQg>g$yuk)C&!ykXM
zl&23doMQpKS^~kSUShgltG=>uSkr+nFzA27kG=s`iJzF$hQrP|H093Dj_tsSt#@8B
z+^vo_?u&EzYEY5waq+&1Z&C9-YdfGmVl)46C3Jke#9J6!KB>-+lS-YK)WV&8z1tJp
zMGL0XUbp151J-zB%x%4>v$TwLO|<vx8cuCsYS2PfE4f<Hc5z$;N_?yYC4RO#^@u6Z
zIvpuqzg&89KyVtfH9==GIfIJ&_zPn*TTsDjvvbKEo5HJ#>Tze+oL6;-5i7dxb}JJ%
zcdl|OreiAEsxVz~4?AG1D+ZqHV)3*pG~6CfdL+g2bpq8~JLhLD&Q(_h!0n!DUr;b|
z^>=p!`~%LuC#8dzO0dn{UT(x)_}Z1m;c3shcBO|La_S(_bA^i6m9BYJfzi!R&sBd2
z6x};}8dQagRxYu10?xWZ$7@4H-`Ij%6kp-+%HRdY|5p0g!}Eusl=~Upklmb%9WF!k
zjgb}?h11qID7ITaK6Mkcm%knFcv1U$(4BAla*7KJLY|b!8~tYu{588KtNS{4w&&VE
z6xg};-oqQ}=kCED5}fY<?;=aTVkVgH_q6)M*`p>3vZV^`V35!8yaE0a;*Sc|D4tVc
zD$}aq?eVnyBg~4A-}4Ik_EmMK9k6}5w&ySBsh2KNZuM0He_YS>)embSrpvQV#qJb{
z7w2|-GyDR@eZcPz<%H~F&lS%9BS7s(?SaM3-JJ@2PTtBX>7zcokIh3>5nE|J*8Brc
z{(OrS6=T=7^8MQ8`hT2IiH#bzrz7{r2L$+%nEr<ALZ?bmb9;k9I}mbr^Q)VJeQQwe
zRwLz5Eb#k!_w@&gyy`goLgjaqM!<f&q#$5d@N@C^1gg`D(#-eA=9^rVaUHC#$j7)*
zS9y%1d?ec6<?Zj~c6M>-g2MBB?nk}-y*asof@0?$mMSqCIUZkR2lDNnB|baH4(T%4
zbFMG*HFTEWXY;o(Ebk@yRaF8WioEqcW_S15J-k6pG@I)IURmx+Bm6n6ddDHFpfG|E
z1?^fARF@d|fA8_fn`Pbt|F3rF{$lnpC1aXX>A3U!oqYwNbAIRPfMgX1{OUvSROf|*
z<Eb0@yU1JM^E{AM94P4T4e@oEKvrKrf1@AF^5kc=>eITYcTtO$EqZ6)_~_uleI9K&
zxOia8K`r>d{Nk)$+>=n7$W|?{Yt`cV?AEQb`m|_~oz*Ak_qjuMF!X-`00960XnLOT
HS%UxoFh(#J

literal 0
HcmV?d00001

diff --git a/bson/value_reader.go b/bson/value_reader.go
index 04275c95a1..047b0a3a9b 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -46,10 +46,7 @@ var vrPool = sync.Pool{
 
 // valueReader is for reading BSON values.
 type valueReader struct {
-	r  *bufio.Reader
-	ra io.ReaderAt // The underlying reader
-
-	poolReader bool // Set if r is from bufioReaderPool
+	r *bufio.Reader
 
 	offset int64
 	stack  []vrState
@@ -79,7 +76,6 @@ func newDocumentReader(r io.Reader) *valueReader {
 
 	vr.offset = 0
 	vr.frame = 0
-	vr.poolReader = true
 
 	vr.stack = vr.stack[:1]
 	vr.stack[0].mode = mTopLevel
@@ -92,15 +88,9 @@ func newDocumentReader(r io.Reader) *valueReader {
 }
 
 func releaseDocumentReader(vr *valueReader) {
-	if !vr.poolReader {
-		return
-	}
-
 	bufioReaderPool.Put(vr.r)
 	vr.r = nil
-	vr.poolReader = false
 
-	vr.ra = nil
 	vrPool.Put(vr)
 }
 

From e0f81a077a3951ac1f32cfecc337e387ccb61162 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 16 Apr 2025 16:47:15 -0600
Subject: [PATCH 03/11] GODRIVER-3533 Account for full buffer in appending next
 ele

---
 bson/value_reader.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/bson/value_reader.go b/bson/value_reader.go
index 047b0a3a9b..214f4c63bb 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -282,6 +282,16 @@ func (vr *valueReader) appendNextElement(dst []byte) ([]byte, error) {
 
 	buf, err := vr.r.Peek(int(length))
 	if err != nil {
+		if err == bufio.ErrBufferFull {
+			temp := make([]byte, length)
+			if _, err = io.ReadFull(vr.r, temp); err != nil {
+				return nil, err
+			}
+			dst = append(dst, temp...)
+			vr.offset += int64(len(temp))
+			return dst, nil
+		}
+
 		return nil, err
 	}
 

From 8848df38388663efbe841759c8eb653592eae7f1 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 16 Apr 2025 17:18:53 -0600
Subject: [PATCH 04/11] GODRIVER-3533 Revert valueReader struct changes

---
 bson/value_reader.go | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/bson/value_reader.go b/bson/value_reader.go
index 214f4c63bb..7c26c41411 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -46,11 +46,11 @@ var vrPool = sync.Pool{
 
 // valueReader is for reading BSON values.
 type valueReader struct {
-	r *bufio.Reader
-
+	r      *bufio.Reader
 	offset int64
-	stack  []vrState
-	frame  int64
+
+	stack []vrState
+	frame int64
 }
 
 // NewDocumentReader returns a ValueReader using b for the underlying BSON

From 3afc6f817ba8f63802117d2bf089b09f136e210a Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 16 Apr 2025 17:25:39 -0600
Subject: [PATCH 05/11] GODRIVER-3533 Use document-specific pool for encoding

---
 bson/marshal.go      |  4 ++--
 bson/value_writer.go | 21 +++++++++++++++++----
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/bson/marshal.go b/bson/marshal.go
index f36ad45219..88a85c0ffb 100644
--- a/bson/marshal.go
+++ b/bson/marshal.go
@@ -75,8 +75,8 @@ func Marshal(val interface{}) ([]byte, error) {
 	}()
 	sw.Reset()
 
-	vw := getValueWriter(sw)
-	defer putValueWriter(vw)
+	vw := getDocumentWriter(sw)
+	defer putDocumentWriter(vw)
 
 	enc := encPool.Get().(*Encoder)
 	defer encPool.Put(enc)
diff --git a/bson/value_writer.go b/bson/value_writer.go
index cf6f1b292d..74921e4183 100644
--- a/bson/value_writer.go
+++ b/bson/value_writer.go
@@ -26,8 +26,21 @@ var vwPool = sync.Pool{
 	},
 }
 
-func getValueWriter(w io.Writer) *valueWriter {
-	vw := vwPool.Get().(*valueWriter)
+func putValueWriter(vw *valueWriter) {
+	if vw != nil {
+		vw.w = nil // don't leak the writer
+		vwPool.Put(vw)
+	}
+}
+
+var documentWriterPool = sync.Pool{
+	New: func() interface{} {
+		return NewDocumentWriter(nil)
+	},
+}
+
+func getDocumentWriter(w io.Writer) *valueWriter {
+	vw := documentWriterPool.Get().(*valueWriter)
 
 	vw.reset(vw.buf)
 	vw.buf = vw.buf[:0]
@@ -36,10 +49,10 @@ func getValueWriter(w io.Writer) *valueWriter {
 	return vw
 }
 
-func putValueWriter(vw *valueWriter) {
+func putDocumentWriter(vw *valueWriter) {
 	if vw != nil {
 		vw.w = nil // don't leak the writer
-		vwPool.Put(vw)
+		documentWriterPool.Put(vw)
 	}
 }
 

From ecb98ce039a1f89dce1e6e76f5c5b2a1d26c9114 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Thu, 17 Apr 2025 16:39:11 -0600
Subject: [PATCH 06/11] GODRIVER-3533 Remove mem.perf file

---
 bson/mem.prof | Bin 13829 -> 0 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 bson/mem.prof

diff --git a/bson/mem.prof b/bson/mem.prof
deleted file mode 100644
index 9890e4d60971f92fc0a9327104ca3331123b52b8..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 13829
zcmV+gHu}jQiwFP!00004|ExTDd{jl!RFk7gNK%;y6e#d~y7GuRA)_GP+=_BZP*-;q
zhvX5W$xNJ?aP2i*as=d5Zb48E0lAbb%BiA60R=<^ML|VHMHdy7b@_hP{bq6iGUQwT
z7+zjiRoB&3)z$rcFirxBN5WwvDNfeLxTH84k0L2fCaC8`6vgo-NuU!Whc7}iUII=6
zGhPb(ULa&9OF&7|sAG-gKLjRGl2OMxA<T3s==gUUr#8+@RKT?{nUak<)^7<W$=Y<{
zw^52_9G*%r<7GT90tFU_b*ZjV$ND)TGg-!C3Z)pS)<Q5F$T-@6a+1PHz+qs<$wbUl
zC<&NGX-29w6f%=!A|j!YZZ$L0WjvM6{%Rqb@lxVYK*&sz5?$mnGOT}?C=;k`@>dJd
zjFWZHM#xN(b?_3p#K^F6%ygMZ3r`+f$jC|fYn+-W3F}ckqrUZhoS7~qO<lTGv6GBn
zXniDO18QK9b%a$=hfd8qrY5h8TeNI-u^}}y>RYS8OqWTtWVs$s!TowX1shQ#qrSBp
zT$j2M-@0;L*r-)2DG5aFxcG!bStqGcoD@`SrpshHJZ76Bo{B$c<W#(rE;TN*4m0t(
zbo_~JYCH`O>G3pdOpT4ptQ}yYOrh~%9*>iVex(@1Ce*~Z%*r)UrqY?6n--xNC)4p^
zHJXl1si|RD51J^`=v0{=bzw_2>cY$Ea>KN)G1Dbd*($A;3_PjTl7Uyy6$V+~vs%(=
z<d`oNXP4mY1f|wX@JhPUsBb-;;A-ef{84Nk!D1&S*G)-H!}Lb+QcyVAOqVX2GnJW+
zm-X<77OEcpiT-3<WgTLnGU#wrs33xiT!};4gom`LRVyjMl~F;9VK1TiuWKRd;{!^F
z`q+$`8K%|KL|KmxR~AuGdSvsEM>M5N>P5I>O7&@5R9SyPU=hBG50~<+EJFPX5fqsU
zhAKwRLaLa7<!(TmhG@AP;7BcZ1GLC8F0+O)2Sod~MP$j*98^+b1B$YnY&MV$Y3+Ij
zj+caUcon(uT4e>o=G5HCwB~@Tfh%cW=8CYPev)c8#B}9&kC^GQ5$zeRc}c}@0eSjM
zY5WeR7$+Oz-Aa`W@oKu-Fs!>wl$X)S4SG~f<Z9@W;c(n=<=Kgi>NdFaGKab}FO!Yw
z=<4Ol@fu+(GfrNLx0rGAGQ2{OZG_j*HO948R%VjC6y4-DuC;E?Op=#j7G)WRWt!=-
z32h&`O}SSCoT>S1O8cYyY4ykv$+K5{D%hHhn>1wxl#dxEN`sD%I-+7iW4u+(+8A3<
z3nSaQ#YA~IogSk{n>eC2K@WM1Y^$T0E=@Z9={IWbrub8BrPQW)9bIQ!YyD8$OqW;C
z%vGCJ#4vDzc6|e{r|S*F8lPaM%PXmDo*us(cg8FH%dsW3Gz@EfyqPZlL~G}4RQM*2
z*GtR9R@BP4!TOL5aTT4MzEWxL3hbhIzXDrRYvV>M%S73XN-KN3tBI@5=<rq3hI|rN
zt5#C7ak+WLm4CXb8T(3{6of8vCGX!qq4o#g&wUzd)vEA<7G}D%Xykg$>6Q4JmgGvj
ziEc6sYa2__oXXeg@ju~uJ^m-WnQk@=YaNeg(#$jL6!G#ZoTW8&72ZO(7=|^ywwW%k
zrlZp%l8zP#uEwsU-Qlfb)R?(ety)QStmc_lSK`%7m)FqId0#5sG{dD@H_h-?y44_S
zDTkeFX?`>;{hKK^bR|z%Fsk-z{KMj1bFC9;IDES4;AfgY3+HNT7T!j;8HRO&$Fu0z
z_j<fJzN5#R<Lz|2VOVeQY%OTh(g^?adA265<Sjpssr}BBEyI#()k>1?tQMMocD%VP
zayCt#_K|X)Ogz?D89x)-P#dGI^+jVdU3zH#hC^!nYFye#jbDxJsGZT)dajX~F0Z5V
zUwG-n%WH764ieX3dunfVuwG`Cucwh4HYf#Mi!bT%Yq2ABG&)%-jJ2fYV~!~2abr{E
zJZ`*$?lA7O>Y3@X6)pMcfSNrEU)RYn3p-P1qpdZBxxaz7eXPe@;I~>KE$}Y7%V=wT
z%?fEvQ}^kppN+fpcsAZmcN<--tvr4st^V<AMc;!nQj~Na>`GmYZr1R+t|l%yBpf#(
z%rUiYw&%L*uWDAWWvd%n->6;HOqVy&$x`ib*WoD5-*woXx*LWyjFa`vw5xozlKy)9
zS=S@iV-M<K++%%}Xr{|s=;Wra)Obr=thLh;ds0uMgSCjYcPq_2718cm9ae6msngad
zg|)(5rLb0*Lpeq-tGnxR4sv3Y3UX;T-F(Zfx7}KuXOy?o$yH1<PTqi7iogwcFWqb0
zXSq$3ZD{#^wpW~NjW?;$)_6bNZ`^0yXrgROo1)gbLWle%_fAvu$=jQ>X&Y4zuhw={
zx?L;(MqHtle<S{x{%mxyCbRO}(~|Xi{3e{FSL03i06k!IvEJjj(t*}4c~?n#GuBhA
z+>8&>gT|ef%S@LYY1{7_`xe}*qt-3>7y66Q#X1@1s#j6R#I<YRp`)@`v6(JA(cv8$
z?MB?nOQgOlas6d)DiPv3F(faI39S4(XvuG%Dd)HqN3(H~<gNHu`m6Df^-nWh-brP@
z>*3pQH4i7t+wfs}*m%fV&gh+K)8Z}4wzuQIwRpE<Z|ZG4VtvcLdl&6`UXQoIkMwvO
z^pe+j#M)WgM0q!@p06#@)(QG;u@ChzI$7B!$}Tjryi6&l9bT=J(++bf*T}OPnJBwb
z+4I^-+GA@q+8%APjlNcM6J<9#dO%ZdjrSsl<iv2Bxk?2ocih?euDiQ*?N(vRHfFl)
zPRBpy5Fal);5?Q!Np`?|$~W$@{ARlBL8pIUmx`AiaW)Sp%Z}KO`WYRpS!~IBXijNl
zky{9^%Up8b3ousAnAE+;Rn6+%6ZIT2QTC+r4<igdpem{g_=KJntdW^6bLiB!uP7^Z
z!rjSg33tK*Dli_kc5xNci^`tS0qzdm&_s>jfsfH+Mq6ub6Ej`jOM5;)sPON^sTpeg
zPAsHCqpdY8!%Ua=(YAHWOT4@m*Mrv9`pf1HRY4)A*S+^egF?I%G*`G9xT0$!p<zY1
z;1zK{EqPbd>Wm}xis+0*RAh9rPO{7VnO3jY<JaPHp6jwo3p(lkKUYx{$Dapi`@x7^
zrgMBqmk-jZU$rf+!8iC7%D>S3IoccU!hy;g?m{2=j9ymIOqYM9IUhx6%-~6@M3D!2
zJb2q*{#w;UXrg?G4u89T5!dQ><DH7;-RLL3QEas|)8)fdcA965mtF8F9T&Uc<Mg-@
zuqMQr>9RL%Tc^jnM%GSO3{ubtSo2vCkI?cXYt`E6hHEu`Hw;n8D6v*BzL!pZ7~y%6
z7P1e`+{(EzPIkxcilOe<pZXi7)!9s!xpaKUHbt;UWaH8U2hadxpw6s$G-tRTzXyNS
z9()fDqCv($>lgN5n~r|M+lx5a6MHG@J#jD%HU?TbCd$54epHX<;3H}@2meNYGX`1@
zo9Qy2_I$yk@v;|=V%kZv7yh08ZVa?aOqBg-PBhGAAh=AnIZRNC10Q<0_aojOS2gRC
zn`igU@2BG!7mNk8{mY2{yCLiBQ7YdM(dk~cV--RL4?lV?Lh14`Dqo-j;=MSRxl5M!
z;y>sgMi*-uOI}DvKV|M&a=jK4;zz%D1sAc86)Khzc%!tL>#HK#bds5hm-pcqP3u1V
zC;ihXwuUk-ADubD<8ktS?5p&2KmLpUWfWU^CQ3ieIi^SN##XAtFQ!wAS)@4mXM6}D
zv#$IzhJnIh1gt-sC?BWNN$e(Z@&OeD>&gdk2+$BPO04E)eHow=<MsH1c$FC^|ALn*
zDi7jNprH(PWoBLZ7aRsOjQ?WA25I@0h#%dhxCqhw&$I?|umHhzxhpX&!$Wzqm{#QT
zKV1BHAeftHhuAzE1H$Z~B~-THv<fSK#W}2sRQXpN4m2E$5nxSXgY~DAb2P|9IF><D
z<U{xb&=U&e0Tbl_Dxb*^aq?lj9U(JCK8z!QMk;`8GhGg(IbShr>{`Rw=HyC{FN`qR
zIwk!F4D8oYTPGZ6)|Z3m<OHpa-q=m)jQbdMWp5k>G>UcFwaWf~P=#1rnircW2h*AD
zS~-tkTcyfJa5T_pFbu1WiSloBW}_bW;w@_2i(`PsfMHrUn<)QIyQY7kqDCKdD}nl8
zDNrdGW5K${b(t$M3_~ZdW|JB>X*&3Ce^+TiDb+C3<v(cutoPI^&c)X_ex}M?90xQG
zj3>d`DqQtl^8FWJg{s)%Zg0}&ABuAhz5k@`Qx7QAJY3FOgH)M^<AKJ5F#)Wl39d`H
z*b{GtAE{MKHkAL2BL0icjMFu>joaBub)}6HfhK}+gY}535u?FoHKXL@`LC|s^sH@6
zmka}qpRBR_;!eg+k$rIz&?Ls*0j5h10Xn=)gP8akS0s%%060~g48st(s#!hF4>Ffw
zXH52#dLlGkawt&Q7dmz1V<}HmSLWknpvhp|XL-$ZISlC751%UC_fuQU6xk1_08Iho
zDX=`;Bydf8KU}9)t)%#&Fbr<gp0oK@v!NUgH0*U<=N90$I5S>8iaU6c6j^{z13eAK
zBi5F<%oO=3P6e9Ee{N;rMgW}&>muhd{EjV_A|JzPK+_oHTVcB76F^HwY58r%x$DwO
z^4A#-Bj5>$=#)hr2{eAh=W1yc>R6p33voKobTA&WKIdsi0hRr#YqMK%D(45691V2%
zvxtVco#ATiN`RFk?&NLgNEiiob{<_tY(tI#np3K|FT!WJUFgH-xD)Bu^=hgt!Wlp_
zz?ccvGYOfg(ucEvW~smD^K$j$Y@pdJ>o_j?N`a<+^{TQ#u?j^gvKXHMdIpR+V3FyP
zV}bTWxeW7)ZtP0T*m3YpwoB3&D21+Lt8nR(<A4tD->UTSIF8^#GF3i~bAjf9@hn(J
zgxOR+33Tl3mCF4C_za5>#KYW$38}c6Dg!tVXr4lt4VkGji1UHwgYg_#A9LId;qySx
zgK>{_m6<Nb15KTz<tR~sJVln^0-yy7fpgvjpkt+nm8AVSKV_!K{<simAsCCmx|`$7
zH+6Oo;gw!z96Sl*VFKK!7W&-URTqGz_uS3`FkNyY(7_|z4T+Zn@GCA3Qsn?#473=G
z7r<J^(RUKi!l<*~q&6xMTPGTqPlQR8+}kB51MPoG2Zw>UR0oHFxCCg43J&u*I3zmz
z961@J-v71WN^gi5F_$aBcy8$YQwb0@OqZMjG;FzEF@x~Gygf;ggK#O(QVx~B$D1zs
z6wuo5I9SHZ!Fqp`A_wC#pk)lQnAgVBK;!3qq|Ej=oXN#)s{9+i2=pQt%fXtI%zA|I
z=CQ2D#3}F;JPkKCN>urHEVD5csBFw}<r{y;wY<Sik$=Y(Kr6uLW-UrFU2+<)KRw4k
z@WUiz>;D5+0<BbYY)xV@Besg43e%!?GMmWhK)WV0a$Kd(S-kuwzM%>I6ITJPQiNVh
za@BK1^d+aW7M-}>M9u)(e&~?$mPXMAT)g}jJ|`7F|H9Qks}-4flF2w(Le8i}rm36>
zbnw8zYGe{*7_f{(PZ~eH1oV<3v|dyuG_w++MsgO=iJea?y$=Dr!%UDv0ax(;J%wMq
z4D>R`ns%9KJg^364H#>|`Xs^3kh6jIeEQTPG!x`7P`%2`G=5qKv`#@C0W(8B1GMcG
z4K*B8*vm}ir}aSV!Po%SU^7F`0op!A1C0RPUP|MqGN3XrUIA;oFf-&_pp(n?s|lX~
zJj4MYjh|ixdKHX~V0}>A)zp;;3pR(j<CHuLX2UZu2j)gyC0yIgkk0~@pW&F9AV&gj
z;^>~LpJ)>cTgGh916sI)6{9pVG7-V`Cs!hb!(r~`rE?g47Uor-ARLZUU}wgJx%qj1
zFrmQquN(@sYW)EixUO&|7%yyQuRjMdRgZ?5-T6S}Ur$l083p)a0<tYe0d5A`tb+9O
z3Ff8pIiT`VE!1eh6<{XFF@S5eB1Z#m0otOVmoxepz^y=Al_^)V;+_XuSYb*odsSu`
z`|@3!S?0rY@VujK#n|RHW`<k<bhN@|2Wlg@>bnvgoVcC~qTz{)h=oAI)~`_BSPFQX
zS`npy+km!#@fujynHh2s(DsurD@n%!?$x}H1$-Uobuiul>m6owF;LkF-W(>#aZ#@u
z2e=(*I~X0TG2pr~%7%-rd1vRl7Q!M}3|+fbW-3Fz0CcRJ16+c967*S5DnGpm^d{%K
z4_N<8fcEcW&J*N#(Cxo8etHY&EyemOhFS`AYO{u#04nKart;GcpdAY8e$yqF0i7;m
zpm;eE)D|q2AIgEs6-;;2C0_(Ox=zEC0^X>cGosXt7hnl2g=O&K+2XM7Gu9kucdDfO
zePCWHmjlfo#w9?4oCLUEm<e(+;AtIBCIP+;^tSSi{US4!hu#5thvom7m*xtfwZFck
ztTF}k?kbI+b^`5GR++`s%1WT}_Zcc)J_VSKEdEn~yMT5npesz5Tm^J$H)q^<`E&&4
zX~5k;yTN!DtOjO=Tn%)1s}2NH0XK1GOyj5bfZkJqU}c<{AzuPoxL89?i+aj5z&${F
z6jXWb%FAmxtboO^5>`RiZmZ#?h-0ed^)k@@S2U^VfG_9?rvvT<+N(&-<O$aRjjxz+
z5BoYr&63dbWmpp-s=R$I(ByZclHQ;;#1SK+<C1HkYqu(RuFIn^X<Q^}eyf0(8FC%a
zsdbv)8GutXzcT>$0qs-#KEeF12Rgk-LrnvG&*9hckA$A<V10z&ePA||8-PletW>Mh
zDXnG#wlfptEWqKq#JWzIbSB{YK<|UGAFQ^SX*~V`&<DUZ)-d*iGN8%7=?Zl=aGxwQ
zl^+fO9RTA)uo{^e@)e-6vHO%qJp))?S4FgE01pBk1mh4`+v=Jb@>QT+Pid$*fFEfn
zeggVPK^>~gDIt>8Q^vst7!PIe3cOm8-81AypcAigWtkx70{)j%LK;7P4D>N@ZFv;T
zMsgF-{>9p0&jMa!Cdhe!rMyB?`Nd(N!%F6>Gt+qF6QEC&%wu?kYz7*(fRPjAe83Tm
zmBvq>0)48WPI83U0<`@#-XkQ)=K#Oq=$6V)M}Us-M(TYIZd-w7Zqh){1HP?+o(DV%
zbd-TMaRt5&sB9Pm#Yr1&1T$T}26X!ENGtU^<oR9)+Ec3a_YB}$brD=wxe}ij;gK98
zF4+j1U^8rit*{MVgRZYfwH8h_o60wUj_<7E5Ybw@kD|UEX!RsbeF5M;ZJh;xp8<WQ
ztg}a1=dHNS!+5%saqxy?o$Zcw!ii=>`6kfn{cN3hxe&0>jISvF7Xp3`^trOpV`ek?
z7SQ+?s<3pHk9rVXO?l(xoROxy32#-Jl^X!kY$|sE&40HFrKoWIlyK#|HHZqgmsQu)
zm3ScIOV!Ux83#KYs^yL>yV(YB1FfFOZV)F+u(u-g4$!6w8@$Pc8dWs)>%0wR@QxzF
ztQDIL<xZgT^}0K-2=HbzUM^NiATx#k{sQO=uB&g#Oy&2-fQ~6$w=y&2E}%127ZrCR
zBBecdB6h+qHJ4MdHj}%7&Md2<hqE-=N@=vR=)2Dr-6h`zIx#L%qVGykvcCs(X1rG7
z3xIpHhr9szCD50O>v!wA8dU0u$G;2jf!>vntFcQCjT^H$%r#Vm_o(9-W;3}5XvzFP
z=Kbokc;Dmj9-*YnwijrA)NHxPTld6Cbw1JCy1go(M9jRow&{}lfJVNjUG{N2B9P<f
z`#_rx=<Mgj&n1ADoAGifV1F}SE{l{rO8~zD`bxzTBQur9zXtkRMTwHkR0cc_bX=v(
zo6K~%A834ZlgdjyLw*1>dHr4$JzoSI%bSZde)<OJ8>QC~lGPXKup}k#gZE)Sl)(p%
zcF}Aq4*;FmT}6G-C6JFCJw60lJw?y59Pl~bHl*>>w?N;jS>`308S)^|u&Eq&666ZN
z1v<E{0Q?T<JK%6XhI7Ippo6P*NwX6029-!w0-gXm0mk=WwKQGwBcM$SIHtu*6OXZ0
zUGig~sT=fSSPXbGGG82t=W4!I0q)j(tpfZ3=m*8u8;P#w6%N~A92`(a{}2vBk3;Yg
zT=g*=u2{9r<R?I<U#y~uvlhV(YUWRYPR)+aT+Z8uW|d-1y*J^LikZ|rpE?ScX1Y8A
zG&$;JI)rjepQs702Ar%#Sq=Dapnoe-#wYTHn20YX9)U7A>af1Kw%JI2#`@ua6E9x^
z>}n>+mjU;3`bp&%CxK2XN9&TA#v?xh{Ro_>_i)ns9BBC(Moy4x0N)TQ39kYC3Fs#U
zwT_{_06JQcw7##6Y|mpro1Tu?>LhojGUS&)Gmq|3Ubz-@M<b1&eg^tk3G+pq>&lAs
z<Jt(H!RPP=Y=vWNk}n;(!l`C6`4!N%<$r9F*2*Mb1D!rnWl~pTS2X7&kAtt2MZS&@
zPc&WfIMCWM?NsXk+bCyT2Y3qTl;ZO?Gedp@bmk*XcRk=?U1O~W`~~P21@v(oCxo+-
z+j01&VyX=JEzq_ZTE!ax%k=8l0Qf7=uS&(sSexGgt^HERj%DDiK3*E{X$Hyw_i6^p
z0DlAeO);=LPOow2h$Z=3_)e|y6OPMqi2NSt=wVIxd_n1MrN$qC=B(1Qy#lzNi;gsY
zIt_GM&9<&~HF3XJlO2a2DvSGXpykhKGOq%T)?{7<{14E76qymVtC>fa1plr~<RsAc
zZ#cRp$c=!dTJnv6zXScQN`Vn^rc3?^wB&t;;(B2ySGP@~&8?)AlklSx>X|gB))pqo
zpMbW##jz@$E4pjUIN6S`4wx?aGtjWHYZjpyFE;@;Q!V{Xfd2*hFBrY7My5-i0xDg)
zL4j-r?5{vJ1D*jo14bw79y4A30yH^#)_sRk?5{v4Dl{^N`7|nGQ|d<e34VrC@C$VP
z)zQIjj&Z*MZU2H@G(m3RdRr~cEr4M`VZrtB9_8oXIK9VY-Fqy9-y9-yxsp5$H1lIk
zWGnBp6_KrgLj(;`M799eB4OvKLN;#FbSIp4D1;3&L;eTo@M1nyPLSIG&!nlPvJG&k
zprOKOYn@IrGvx0;b0%w`*8pdwDxlW@hY1?SK>y+P+<$?#Eskn0PwD0i(DFT+zt;iz
zUPxvdKMfZ&T=BPx&-5$OSl$1?@9<yN)fvaf(aexxK_}jeQd#5lnj;G{IZ}0oh3?CS
zIcW_MH2(SLRH%9baHH1D8(g^42w^-StXJ46h6*a1&QS4kJ77r3wH<JzppgnFXu9Mu
zL2H+BD<WRL3CP#RQu$$&pi#mYEv&mummDtW=(1hPbKU~{v!e4B;21$;6wLi*h8!WN
zbjEJQ(GI{9Iu`HX4G5Jgpw9%aoOc@TRt0GC5HVB?6T`&_N36N*HBSgC9eY#}DF-~I
z>#cIYv4X}5W1O(Qkkz`NPejn!Uq%XAxc+U0{x;wtzD1SBPfrSZQW)cfwYRaEAx8;X
zGC@!B4&ZNkl6L?n2%4ZKIaQb2xe)`@;SfAhjB+MY>K`p==9fFwL^}cZ>iT6T;6y<a
z6^UKab%`r+#&wHWSUFlat?C|Th8!bk$yZ-5<i6xC!0Eb~ybExWph?2$W=%^rGi0ft
zvM)8zZosEB&~CuVf+jQ2_+&n#5H##01I0@Zj^M(aDmh!i7*Q(53KcuJT|Z9H@u}Jw
z-UW3!p2`nX1Wi%S(A&(APYT*|JSx}6QZ?+OHcK2L#)&5#J<R1T=XgQK-YHj(p-TM(
z`5s^ysdf4u;8TL0QhMJ&e5@5I<oVL&c!!Kyr4s~|&N`;lxd-q`j=HJ*^t7O-g)voF
zk5;q#1P6OA7qb%ul}3B(>r+&EpCoAe#@7{NdsW$$naU5-1WgmhbYUT1H;P=aj-Mzd
z30<`pn;CMlppnb?4nl(52e_R*IhCJg2$~^`f!1unkveknT(>B4@;upLD$LD`DT4N|
z)@`}>0q1eYGnJoa3YsbSnj^QUpAs~3mIm4nIGs-?Qu%3?pjiwwG2YCOPYWttx=JbM
z1HgB+ay|f@Eoind?y<JA=T8;1e75HK0N{T#&j$dX5%di6d`j@fnft@CR;?u06!DaJ
zTHJE0bE9OcxKSTggu~LzkkbV1pP||M5b#OO)`x&|1kGW#p5RlH>4HkX<H8_b9*i`?
z4g${Qt2cazcBN_|GsRl9lG3M$X=1uK&wMik&77#2KLq%bX8sW1vx1&w=BM&`a%F4H
zsAR2~f=-n2CI1BZ5#R!i{1M<hLGy%>Va?(jZnFd}naDtKvJO6|JY=?@VWW>P<b?Tm
ze388-Lq5YXOf&K^;3-Y(W5D@><})Kd34JE&R4jF7idkZ|c*fy|^UWMVrHeMI#eEoX
zH&aOCr{@GcCyeKX^)^?ea|M-7=F6N3@)N)v^;JOqgt?~$oN%_(H#6k39HunTr+}|&
zpico83R=iO8yIMwpyQvOQu7@FoTp2TBY=wpEfU6JVg1D3F<;P}w>8vJz;85HM*&|D
z^n!x=oVj{V(47BhsLudTvf0!4X^EgE3hI4!?B@lYDA!O&0e|LQPKI0{=<uuh<>!De
z>vZ%vAC=Hjg}Q{((LzD<*DzGP`~t90N&N-jGC|7}kk`zRiv;Z&uT5|Wa5^8uH*+QK
zOWHhyTQK$Jh`HifF;C1F&xz;70<lmmimW;obg`f%-*FX`Addm^&Ed>cetJ>Ri^2$S
zpDaVZAZXi0zJHM*zXW`jwUNqC%LOeLMu|4j5<$mSX+HJ=^7kFCt2nqiroZH&hZl<%
z1mEmbm$LfgE~(@NO9ic~2=OzLRT!1eb@*hMY6c`M)sdN-7~gZ+TPEn#$mi7({|fK`
zFYz>fS|MnKip}#_xEBQ--p&C$L4M6XsiN%HfGY*9R8Zfsl9vlQUXk+$t2$+cpp(Dz
z^^^p89Pk*MCzYR830lQ|eUzD4DQMG6QHj4}%{O)>hB2%(pS(=GD3*&AVr4|%>@uqa
zm2TuC-~{;%SN4jfZva;dS}phx_!}@A%GH8Kst;`v<hOvUgj$7O1^X@FOM+ffu&bEj
zOM;fq(_DPVF-|$jcYrSodYM_BDOAPh+>)%bN~{*M#Y>LvxwrhXpwmxl0w(}xvo2Hl
zX^o&YOkj#C;3LsHITF2Jj)=uRzDCgUmlh~{eDB18G=5quXss~T3F|v%b*-RH>!bGg
z9h9oq2^zLqzx;vwL`upZ0M`pzuZ(n<b-iBD%t_kd{|5YonM~uS4T3gkC^q;8LF1pE
zuh=*V_@kzEk`Ga-Oc<{SYYfvW6I4E0)A|bVFmG=&<ST*>zo@ma57dooUPcEp<__aS
z@_K8;TCq;77aK&GW7bz3`RDS)uL_#^a#a3b*cF;_&F^5pdKPxXDHQfbK?}d-N;yIP
z2soM9PUWXp1-&Ya`}odPhTJ4*>L|_NPk^Jeoqqz{C}<;_X(VfSv!K!nDax6Th7~TE
zxKV5pn;pKDJ8ltl{ESxqSNh<P`-kc)mRhxvlDAZnm3LH+m>F`bpgHq3%Flq$F|%p>
zv`Nq=Wr=aTsJ00@Sbb5wCTPhbEx|s(7n!+BE8Rh=vsG*pE5vJ+T=R87^M4tw?0E`s
z3RjJ({IprnW?`gSPjd2oL(u&Ha-%6h{=!F|%7OSv&=z5ARh4~)+%9O&#C3|)ue>`|
zP`?6h6SPejuL<iEyT+S>$}1w>`^;jqiYvzTUl(tP?c&YKQH*OCR!tkO*CO>%B40p@
z#JA#Vr5LY04rFs{GwpBc=({B6@UTigk}ls8bSipdu#Jk3k&7Kk@+}bvMmcF=X2=~}
zYw%V%fw$35#vw<QazTfkey!6Q_&dItf~xl!X>-@vA%28%6(5+#-Efvz5rO$i`rCr`
zM47r7_1@Ch%q4u1d^^Gv6AJS&aa2F?6V(i?H?AMw5p-}^bU~_fD-NU%q2zZed7-9d
zX2_j_Hm#eh?D-ova+E!P1AJZ3>%w?L=;N1Nf)2hgPeGjqJg&3-X~6A*whQA;VIAY>
zwOi1(-*mM958y{kE0v$#67&`?tq*y^cLnWV81>#I>>7<KOi*X1*d=z0cOB<t8@wlI
z;UrxY{to&ZkW_x!A!r8|g|G6|djy@CscY5$0zSuaEtQ|j1(kEHI<<DSGW0#M=R9R-
zy4)*h`FD|fsGU^NwolO7GS2VuvMYYbJ7vDx7fH&vS3F$2Pdwu7!S{3{mgTbSeL=&j
zs)XD2(e`ru`%zKRyj1QNw0-3$rRFn$>-io+Sm0JxWE#JDThQCWct=>Pc)uSOxKq$h
z_2L;;?FWJm@7Cx;1Ufa~5P`b{?NU%LacnyvXxm#FYN)^stg1AA+AV0ef_k2zJ`^<m
zCk-`B;CC8on80@hy{n+gc?Wb*(Av`s#oy6#kIrl)4+%OvfrCxF{#-Ue4i~sq$JyZm
z-xKs6$DB1h%SVEaPt-whguo#hXoSE$g7yewudrCGj|ELWv|5##PYC>tzh+3|r+tF<
z3FCcXebm~#R2~+z?aSo~YNWset<3~EN}zLOIa1($LHiZ-{??gkJoJH}57djvz|GZg
zTzEJKYuA49fjA&O6bHp2@sapg92R=DaE$y!(DJ=3ZvyM}C_As|O56rp#xN>=a!$m0
zW`_J!(Ee|th+&;8j|e*TZuI3ROs$zKNl{ZjNv==Dk#m#0b6VNbDKCD!VJ0=okbvRv
zvkQ^J;dzVEIv`qur<Nx^SnSQUJ@I`8h3udw#ameD&+YB+^QfI03VPym{UyGTCt1JM
zkSPVelAzr?0+Ou%)MJ+i?0kD*aaM4UFXSEQwla&ofuJ2|?)KROda5Chl~oc9WEJ{z
zy@gr%{;XgiH>(O#mO^po`#nvoyst#8upndyyoH{OssIYH`pX{7fG1T$x^w+S#RY}7
z$2>0+4q(1Niqqb~afj?+sKA$>Rp1NR0iU-pi(ll~#X)y3I~eM~4_&>X+<rNsK!Gpc
zbKTi<Fv2-0WGOQFe$S;2h&xzNR9t8)dhQ~oY6s87wF91|K&lY1GSxd)e&3S9!fxIo
z+k+0c+sbU$+}*Rp=eg?qO!l#Tx&4Z~fybEaE%|<Tk>8i^&+Fs%2lBJj^R;<_g8p_O
ztG_3!Ptfmkw~Juh>nrjGg8jUO?!G0y+?Jj@vhEGqfnZi~zz&A|K6ig_@bMCRa8?Jq
zzg_4rwgV2m{3uDLSHVGV=9}3_=Z6BHBS4_U*Ui(Q`m1a;X}0H*;2>YF+sf?W_ZK#I
z7Z><)3jG5-P0kjW;j)VT{z9Gs`LD`Y)!y_d33+aeMHvCR(DnxH4*uMdBHI`0X?yeR
zfTv^4G|}H%SYr1MC>qS=wXtvzwSuQz&1Nl$nlaz+X%owo=kow}wmaL?q>80_miT&j
z1Kz?yTYE{ir;($2Hbwh>-U459cX3Iu-<`HM&vV5enC<ZryF>+y8)9KGDpaR{zsRvl
zRiocwhdgP0I2^jWaoAFZyZmeh6i8NuQCh|_z0V#{%_TDWl=Lm|S4@>tFxd7O=a`Pc
zveYlzBTYY5aOjR@`T}1;NUe_>JPm>>P6as_loS-^aiqu(_y>5dJbP{jG^>vW<oVBq
zeg~sB(u`S|TDi^L{I3%eZ;ORTD^s~UqcKmc;P(Fye5TW}(B?%L>-@n`pd>fc-k)dZ
zHg|WhbNzYteY^r|x_mXg-b^Q#br+MTSebg}K!gQPo0=`-JSBiK+D$dof5CMg&#g7Y
z?PB}#L;XCr*8rVO7g;U;uN36*bg04f-r{20m)Ff67>f8$OcAD<|K>baP|U?d-$FY#
z<j(CM>gDNtu2de-5IWYgm(+9KxRvj@+xva}?La6tJ7}Bt8dPj|4=D8e3qt)m`}+E8
znhQ7~NB#Ha*pyl1Ek4H@s$nuJ@)lPtpzC8{pi{}<!Fma)h?iZ{nfsOu9^9LA7aPS@
z)hM~%!ouqB+Vi`HjG!x(PR$i7nhAIIxl)M(tft~w(wrCWP|p&d&kmd`COaUJe;KW9
zENZc;hF7)5?A(GPZ(+8lwWoC~B=Vy0TEFaPp6)e`PJO*4g`wUm=J(cq8wj#AF(r%8
zpkiAy5$IIn%VpO5d77b)v4~=2+C{~oL7lm#@9WLA9f#F?D7m`TOfE&Xx7sT(-3s5m
zxIEpercpmqf#>@@SI44=uDW8cTu)bV+{(4LGZ33770a-~t@}D|eTk}}R0YzvFK0Sc
zfSkA1>Z71oq<Ym6?++A&?AW~5SpW(n(A?druq4>8rkP!P?Es!!@zp*SRaav`F%n60
z9esHhA6`4E(5&Kota-NBuUyk{_sRr1)y&@=f)#!qW09k$4m5XosHwZ#N(IUWEn=}j
zo(>vXXEE(<6sX41p+-Ne*Pcd^v{2+N_6CCm`M%zLy}?j06lig-T0T(X3l$XEoYdHx
z8=e=tVo1&7&ap#Xy~Uk<dG^5AwxQexh-6_M)b6$ic{;_SqVt5t%3{aV7O*lO4f=gK
zxn9m>+zJ{P>g9jT_SJOFF}2=7O^&q}W7e|=hVIJg-c2=x0?pmty#8KauALL|hU}U)
zDC~hD#f<7aDPCe!NHtz~i^FD#HDhT>lt*y-W^wr6NR?W{c1uJW=0-~sQ<)WQGj!B!
z#kT%fZ@v88yrF{rc1=?(*QC93{ej|=VDDhDof|FEvSM*>%|Scf=f{Q+wC%i$l93U(
zHQ3%8v^}0!cw&rpIo-RpS3*_p*L7;{Zkv}ETTN7L!LdC%`$GP9C4FPf4y>E#f@OT(
z1hJ}O+kIHo9lY4KA5+CtjJv>dd3eAM+A;RteD(mxP?gq5Z1J+&IZ>Oc^un!M)=cHC
zdBE;lP*~_`es<5K3JSLXY;O^VE3?W#Ra)LW#qb}@r=xFdE3-lkI_SmbgFbtJVuB-z
z9V1RO1}MzfG+j{_DkQx<s`)O0%YJ7QQDwsxQ+D80>J-53{l46iK*08e3I{nn)v#&n
zRN&F56jN=;oJ6&G4qj>)+oN62C^s?fuB@u9FkP!DbH(gS+F?5e0{%d3nZdDxo+YM+
z73-`rmNJ{ib9c=O*@)TtbH^{Lt{4NCLQ(}iml&#l#QkgT{KpditL+TbzQW1s4w)DW
zj4FI6e!7(u7Dn3IyvxcdEXcJlNN%7?vidjIAF$n8CfyJAbiHT|YfAc;=_&I3z>)Dn
zvS~E^t8m&X1=pZAtTYm6t~GOU_*(RH?3-#BB{aQ?ZByhdqN}&KxjScox7gG8?A*d9
zC6UcTI{)Fe9E6ZRV8`0*>}ls01Ve#A+@j|vJHR=*tGBqLFBBN$X?xMu<${b)P!(0S
zXiSa5fHQdq-3ihGBM@Uzrp`a~gt6`ZIau`c>J+B~h5NdiM%93KK(#QDs?8a6_q2;`
zZ|GcoI|m~2FRLl0);cqO&dd;NC|5B-XZ7aJI_8ot7+Z>TLQ@2vi$WEmHHnzA2}_`G
zG!do!>{f1%JKJ+t&3sLX<ZM`?p}Nv3cQ1X)eWAd@etSOdvj1PQalg0bvtRGdj%^8@
zOS6nzzj~X@iFFrZNyk|It0Ju(%=H#WBIU&!OH<OnOivpw7T4D}`j;^yeGqka+3kX9
zStIISh3;fiM-kmTT`t=3G%@|lB(rRNxX996sF9?x^e^MOBW=GZKmUW2n&(_OV1{C9
z^sx8vEtf)jV1%DwZ%4y=k=8gDcn3t6<)zhqQ6*tL%?0Z`tup<q6vy#LN79SO<?!Ro
zd!d?K&!~UZyefV<)>6;i?~ZM|lj|=Y6wxkUJ<xIU_KS8uj#XK?{^A1NqKPTPGUt)G
zE7$P<lOr3oopp|EF695ryjG!RBcRS~^s~~Yr(I3UWQDGk+A0<rY!8J~VT_nI8;qx>
z>E&1G%8LWBrSM9)5py``7s{X71NARk(<yzs_j%OL4R!7io8p}muBUX0-zbHcj<)rs
zzs?;hTP!;kZEGiSf^TffvND6bML9>M-JxcSMv<#1v}5wL+<@&3+4uPiONt77{*qwZ
zK)@Sa#=+Rs{zu_8wwhIQ(Zw6cw{r@7`GvfgFNXhneFcw~RFWd%e6bp$(jjYmZ*D)k
zx!c)i)XWgvs>$u0%ak}rT_^^tpuyLPbeUgux8m#;Vrxfqvj=p|_eZupHT9#Se81kZ
z1k@fUCjaNd`t|{TFxbOe5b$)ancgZ*9L=g13LHv#?19~V_Wj;LQ67R$VsB7+_t?en
z&Fdb}wvEv$>>4^6L|mgXk(ly9Wzz<E|H`{ihi0rE8nJ0}cNf3^v6A8ldW>BceL>3!
zHF<V0H&D=rOOuk^kh(P*QxmaTv#cta*bUWdfd5>EN>PU5maf{Iw~Qs~c022`VN6$7
zqs>CTG!)TnY>|pRt-1iQ+VE^wx+qVKFj_S}L>wWeI!P~UJJN}8aAVvcv*^+Nd5#?l
z*@2FMK#m=H&<^-xQ@oWKRCv4qn)6w2yPWRbVl%Zy)X`AYC9&lPD>K*c%WIpL=b%O}
z8)_PN)+|sl&EDR;yg)^^?GlT>R#9Qw!otoWyC}#`*dxS>4B1Z4z;o9{Q|sz2j%2-F
zet%9se?Z@Z&AymGr`7wv4Rj98SQkl!mv>QtE`lCYpsS+ap56gD>Yl68vXc&CPG(V0
zkIm1j%zXB=cgAAR%6USo!45?4Z8>W-wv5BvI0ptb<b^3jRiJ6)c=?Ns%F2u>`!OY*
zn;niSQ>c=i^9ll?L0$a0kJ)*#?d#8TfkUfGFYp)>Tg6RIUC48fSa&^wHL!nA?|{hS
zcHAze(-qcKROi(Qq(yGf<ob(wTj!}Cd7<QVM=#C9+-h~KQEi?-<rjqdmGt2ciL&zj
z{`^8aE8l-@Zc%YoZc#C3XMLZf$9dvrzCWw@G5&fcFYA1S+VpSXZsl&l^s;jOMaABL
zDv~chA3OuPI~4Tod%>ojDh1UC0DM`Zpl?AgqiGAYs6iu)=|wM%=qoVMvNWa}7~I3T
z+aAPRc<zoR0<Z@-2mAU&n>#so+k^NYZD;=8=(^Zl(m8TaxO!PQg>g$yuk)C&!ykXM
zl&23doMQpKS^~kSUShgltG=>uSkr+nFzA27kG=s`iJzF$hQrP|H093Dj_tsSt#@8B
z+^vo_?u&EzYEY5waq+&1Z&C9-YdfGmVl)46C3Jke#9J6!KB>-+lS-YK)WV&8z1tJp
zMGL0XUbp151J-zB%x%4>v$TwLO|<vx8cuCsYS2PfE4f<Hc5z$;N_?yYC4RO#^@u6Z
zIvpuqzg&89KyVtfH9==GIfIJ&_zPn*TTsDjvvbKEo5HJ#>Tze+oL6;-5i7dxb}JJ%
zcdl|OreiAEsxVz~4?AG1D+ZqHV)3*pG~6CfdL+g2bpq8~JLhLD&Q(_h!0n!DUr;b|
z^>=p!`~%LuC#8dzO0dn{UT(x)_}Z1m;c3shcBO|La_S(_bA^i6m9BYJfzi!R&sBd2
z6x};}8dQagRxYu10?xWZ$7@4H-`Ij%6kp-+%HRdY|5p0g!}Eusl=~Upklmb%9WF!k
zjgb}?h11qID7ITaK6Mkcm%knFcv1U$(4BAla*7KJLY|b!8~tYu{588KtNS{4w&&VE
z6xg};-oqQ}=kCED5}fY<?;=aTVkVgH_q6)M*`p>3vZV^`V35!8yaE0a;*Sc|D4tVc
zD$}aq?eVnyBg~4A-}4Ik_EmMK9k6}5w&ySBsh2KNZuM0He_YS>)embSrpvQV#qJb{
z7w2|-GyDR@eZcPz<%H~F&lS%9BS7s(?SaM3-JJ@2PTtBX>7zcokIh3>5nE|J*8Brc
z{(OrS6=T=7^8MQ8`hT2IiH#bzrz7{r2L$+%nEr<ALZ?bmb9;k9I}mbr^Q)VJeQQwe
zRwLz5Eb#k!_w@&gyy`goLgjaqM!<f&q#$5d@N@C^1gg`D(#-eA=9^rVaUHC#$j7)*
zS9y%1d?ec6<?Zj~c6M>-g2MBB?nk}-y*asof@0?$mMSqCIUZkR2lDNnB|baH4(T%4
zbFMG*HFTEWXY;o(Ebk@yRaF8WioEqcW_S15J-k6pG@I)IURmx+Bm6n6ddDHFpfG|E
z1?^fARF@d|fA8_fn`Pbt|F3rF{$lnpC1aXX>A3U!oqYwNbAIRPfMgX1{OUvSROf|*
z<Eb0@yU1JM^E{AM94P4T4e@oEKvrKrf1@AF^5kc=>eITYcTtO$EqZ6)_~_uleI9K&
zxOia8K`r>d{Nk)$+>=n7$W|?{Yt`cV?AEQb`m|_~oz*Ak_qjuMF!X-`00960XnLOT
HS%UxoFh(#J


From d6bdec4a89ac3b3375f63485ff8f8eb7c756edfe Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Mon, 21 Apr 2025 10:52:48 -0600
Subject: [PATCH 07/11] GODRIVER-3533 use newDocumentWriter in
 documentWriterPool

---
 bson/value_writer.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bson/value_writer.go b/bson/value_writer.go
index 74921e4183..2748696fbe 100644
--- a/bson/value_writer.go
+++ b/bson/value_writer.go
@@ -35,7 +35,7 @@ func putValueWriter(vw *valueWriter) {
 
 var documentWriterPool = sync.Pool{
 	New: func() interface{} {
-		return NewDocumentWriter(nil)
+		return newDocumentWriter(nil)
 	},
 }
 

From 2797876cee475fe9707bea3127a3d980261e4a12 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Thu, 24 Apr 2025 11:16:52 -0600
Subject: [PATCH 08/11] GODRIVER-3533 Use vaueWriter constructor

---
 bson/value_writer.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bson/value_writer.go b/bson/value_writer.go
index 74921e4183..2748696fbe 100644
--- a/bson/value_writer.go
+++ b/bson/value_writer.go
@@ -35,7 +35,7 @@ func putValueWriter(vw *valueWriter) {
 
 var documentWriterPool = sync.Pool{
 	New: func() interface{} {
-		return NewDocumentWriter(nil)
+		return newDocumentWriter(nil)
 	},
 }
 

From c97c5cc3d547ce54d2c7e11731ddec140532882b Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Tue, 29 Apr 2025 16:44:05 -0600
Subject: [PATCH 09/11] GODRIVER-3533 Add get/pug for reader cache

---
 bson/unmarshal.go       |  4 +--
 bson/value_reader.go    | 55 ++++++++++++++++++++++++++---------------
 testdata/specifications |  2 +-
 3 files changed, 38 insertions(+), 23 deletions(-)

diff --git a/bson/unmarshal.go b/bson/unmarshal.go
index bf97da23b1..52bd94fed7 100644
--- a/bson/unmarshal.go
+++ b/bson/unmarshal.go
@@ -42,8 +42,8 @@ type ValueUnmarshaler interface {
 // When unmarshaling BSON, if the BSON value is null and the Go value is a
 // pointer, the pointer is set to nil without calling UnmarshalBSONValue.
 func Unmarshal(data []byte, val interface{}) error {
-	vr := newDocumentReader(bytes.NewReader(data))
-	defer releaseDocumentReader(vr)
+	vr := getDocumentReader(bytes.NewReader(data))
+	defer putDocumentReader(vr)
 
 	if l, err := vr.peekLength(); err != nil {
 		return err
diff --git a/bson/value_reader.go b/bson/value_reader.go
index 7c26c41411..237da7ef59 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -53,25 +53,7 @@ type valueReader struct {
 	frame int64
 }
 
-// NewDocumentReader returns a ValueReader using b for the underlying BSON
-// representation.
-func NewDocumentReader(r io.Reader) ValueReader {
-	return newDocumentReader(r)
-}
-
-// newValueReader returns a ValueReader that starts in the Value mode instead of in top
-// level document mode. This enables the creation of a ValueReader for a single BSON value.
-func newValueReader(t Type, r io.Reader) ValueReader {
-	vr := newDocumentReader(r)
-	if len(vr.stack) == 0 {
-		vr.stack = make([]vrState, 1, 5)
-	}
-	vr.stack[0].mode = mValue
-	vr.stack[0].vType = t
-	return vr
-}
-
-func newDocumentReader(r io.Reader) *valueReader {
+func getDocumentReader(r io.Reader) *valueReader {
 	vr := vrPool.Get().(*valueReader)
 
 	vr.offset = 0
@@ -87,13 +69,46 @@ func newDocumentReader(r io.Reader) *valueReader {
 	return vr
 }
 
-func releaseDocumentReader(vr *valueReader) {
+func putDocumentReader(vr *valueReader) {
+	if vr == nil {
+		return
+	}
+
 	bufioReaderPool.Put(vr.r)
 	vr.r = nil
 
 	vrPool.Put(vr)
 }
 
+// NewDocumentReader returns a ValueReader using b for the underlying BSON
+// representation.
+func NewDocumentReader(r io.Reader) ValueReader {
+	return newDocumentReader(r)
+}
+
+// newValueReader returns a ValueReader that starts in the Value mode instead of in top
+// level document mode. This enables the creation of a ValueReader for a single BSON value.
+func newValueReader(t Type, r io.Reader) ValueReader {
+	vr := newDocumentReader(r)
+	if len(vr.stack) == 0 {
+		vr.stack = make([]vrState, 1, 5)
+	}
+	vr.stack[0].mode = mValue
+	vr.stack[0].vType = t
+	return vr
+}
+
+func newDocumentReader(r io.Reader) *valueReader {
+	stack := make([]vrState, 1, 5)
+	stack[0] = vrState{
+		mode: mTopLevel,
+	}
+	return &valueReader{
+		r:     bufio.NewReader(r),
+		stack: stack,
+	}
+}
+
 func (vr *valueReader) advanceFrame() {
 	if vr.frame+1 >= int64(len(vr.stack)) { // We need to grow the stack
 		length := len(vr.stack)
diff --git a/testdata/specifications b/testdata/specifications
index 43d2c7bacd..6118debee4 160000
--- a/testdata/specifications
+++ b/testdata/specifications
@@ -1 +1 @@
-Subproject commit 43d2c7bacd62249de8d2173bf8ee39e6fd7a686e
+Subproject commit 6118debee41cfd1bca197b315bd1f10ad95f66ae

From 5eba4a7ca084764bf5f96f078ac5748221ea331a Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Wed, 30 Apr 2025 16:14:24 -0600
Subject: [PATCH 10/11] GODRIVER-3533 reinit entire state

---
 bson/value_reader.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bson/value_reader.go b/bson/value_reader.go
index 237da7ef59..d713e669a9 100644
--- a/bson/value_reader.go
+++ b/bson/value_reader.go
@@ -60,7 +60,7 @@ func getDocumentReader(r io.Reader) *valueReader {
 	vr.frame = 0
 
 	vr.stack = vr.stack[:1]
-	vr.stack[0].mode = mTopLevel
+	vr.stack[0] = vrState{mode: mTopLevel}
 
 	br := bufioReaderPool.Get().(*bufio.Reader)
 	br.Reset(r)

From d00dd6c7e113bdbb7b33b95a8ddad94961d6c755 Mon Sep 17 00:00:00 2001
From: Preston Vasquez <prestonvasquez@icloud.com>
Date: Thu, 1 May 2025 09:00:37 -0600
Subject: [PATCH 11/11] GODRIVER-3533 roll back spec sha

---
 testdata/specifications | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testdata/specifications b/testdata/specifications
index 6118debee4..43d2c7bacd 160000
--- a/testdata/specifications
+++ b/testdata/specifications
@@ -1 +1 @@
-Subproject commit 6118debee41cfd1bca197b315bd1f10ad95f66ae
+Subproject commit 43d2c7bacd62249de8d2173bf8ee39e6fd7a686e