[Perf] Windows/x64: 1 Regression on 11/24/2022 9:42:44 PM

[performanceautofiler]

Run Information

Architecture	x64
OS	Windows 10.0.18362
Baseline	ac03fbd184b182a6632a50bbe70bc733e487264c
Compare	4832236b4820ca83bbc9ce96003c2029b85c6ce2
Diff	Diff

Regressions in System.Tests.Perf_String

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ToUpperInvariant - Duration of single invocation	16.65 ns	18.85 ns	1.13	0.05	False	201.4861513743844	209.0761926644975	1.0376702877013613	Trace	Trace

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_String*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_String.ToUpperInvariant(s: "test")

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 18.849892808942638 > 17.439810947425492.
IsChangePoint: Marked as a change because one of 10/2/2022 11:57:04 PM, 10/11/2022 8:42:28 PM, 11/24/2022 8:21:24 PM, 11/29/2022 1:43:29 AM falls between 11/20/2022 12:28:28 PM and 11/29/2022 1:43:29 AM.
IsRegressionStdDev: Marked as regression because -17.392702997665637 (T) = (0 -18.40618606673211) / Math.Sqrt((0.15461658739006298 / (40)) + (0.07983106366713769 / (15))) is less than -2.005745995316835 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (40) + (15) - 2, .025) and -0.09959420037988614 = (16.739071614212925 - 18.40618606673211) / 16.739071614212925 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```### Baseline Jit Disasm

```assembly
; System.Tests.Perf_String.ToUpperInvariant(System.String)
       cmp       [rdx],dl
       mov       rcx,229BA400718
       mov       rcx,[rcx]
       jmp       qword ptr [7FF937BE7B88]; System.Globalization.TextInfo.ToUpper(System.String)
; Total bytes of code 21

; System.Globalization.TextInfo.ToUpper(System.String)
       sub       rsp,28
       test      rdx,rdx
       je        short M01_L00
       add       rsp,28
       jmp       qword ptr [7FF937F0D9C0]; System.Globalization.TextInfo.ChangeCaseCommon[[System.Globalization.TextInfo+ToUpperConversion, System.Private.CoreLib]](System.String)
M01_L00:
       mov       ecx,15FB
       mov       rdx,7FF937864000
       call      CORINFO_HELP_STRCNS
       mov       rcx,rax
       call      qword ptr [7FF937B553F0]
       int       3
; Total bytes of code 49

Compare Jit Disasm

; System.Tests.Perf_String.ToUpperInvariant(System.String)
       cmp       [rdx],dl
       mov       rcx,1F395000720
       mov       rcx,[rcx]
       jmp       qword ptr [7FFD82307BB8]; System.Globalization.TextInfo.ToUpper(System.String)
; Total bytes of code 21

; System.Globalization.TextInfo.ToUpper(System.String)
       sub       rsp,28
       test      rdx,rdx
       je        short M01_L00
       add       rsp,28
       jmp       qword ptr [7FFD8262D9C0]; System.Globalization.TextInfo.ChangeCaseCommon[[System.Globalization.TextInfo+ToUpperConversion, System.Private.CoreLib]](System.String)
M01_L00:
       mov       ecx,15FB
       mov       rdx,7FFD81F84000
       call      CORINFO_HELP_STRCNS
       mov       rcx,rax
       call      qword ptr [7FFD82275408]
       int       3
; Total bytes of code 49

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[EgorBo]

Small input slightly regressed because of dotnet/runtime#78262