http: refactor to use more primordials

[aduh95]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[nodejs-github-bot]

Review requested:

• @nodejs/http
• @nodejs/net

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/34499/ ✅

[Trott]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/701/ (queued, will 404 until it starts)

[aduh95]

The benchmark CI didn't kick off. I'd say we should wait for #36221 to land, and then run the benchmark to see how it will actually perform.

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/706/

[mscdex]

Be very selective (explicitly set benchmark parameters) when running http benchmarks, otherwise they will take way too long to finish because of the fixed duration of a single run and because many of the http benchmarks contain a fair number of parameters and parameter values (all multiplied by x number of runs).

[Trott]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/701/ (queued, will 404 until it starts)

Whoops, I goofed and typed "http" in the wrong place in the parameters so the benchmark didn't run.... As @mscdex notes, we're not going to want to run all the benchmarks anyway. (Or maybe we are, but then be prepared to be patient, and maybe get the Build WG to let two benchmarks run at once so that it doesn't block all other benchmarks while it's running for days.)

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/805/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/807/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/809/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/810/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/811/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/814/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/815/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/818/
Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/822/

I'm splitting it into several 5-run benchmarks, then we can concat the results.

[aduh95]

The benchmark CIs didn't show any significant regression, I'm marking this as author ready, and I plan to land this tomorrow.
For some reason, the http/simple.js benchmark was hanging for several hours in the CI, I've add to abort it every time to not block the CI for other PRs. There might be a bug somewhere with this benchmark and/or the CI parameters.

                                                                                                   confidence improvement accuracy (*)    (**)   (***)
 http/bench-parser.js n=100000 len=16                                                                             -0.80 %       ±5.17%  ±6.95%  ±9.20%
 http/bench-parser.js n=100000 len=32                                                                             -0.36 %       ±4.27%  ±5.71%  ±7.49%
 http/bench-parser.js n=100000 len=4                                                                               0.20 %       ±2.72%  ±3.63%  ±4.73%
 http/bench-parser.js n=100000 len=8                                                                              -2.38 %       ±4.88%  ±6.55%  ±8.66%
 http/check_invalid_header_char.js n=1000000 input=''                                                              3.64 %       ±4.01%  ±5.34%  ±6.96%
 http/check_invalid_header_char.js n=1000000 input='\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tFoo bar baz'                    -0.37 %       ±3.73%  ±4.97%  ±6.48%
 http/check_invalid_header_char.js n=1000000 input='\\x7F'                                                        -2.02 %       ±3.45%  ±4.59%  ±5.98%
 http/check_invalid_header_char.js n=1000000 input='1'                                                             2.66 %       ±4.42%  ±5.88%  ±7.66%
 http/check_invalid_header_char.js n=1000000 input='20091'                                                         0.52 %       ±3.76%  ±5.00%  ±6.51%
 http/check_invalid_header_char.js n=1000000 input='close'                                                         0.68 %       ±3.50%  ±4.66%  ±6.08%
 http/check_invalid_header_char.js n=1000000 input='en-US'                                                        -2.51 %       ±2.82%  ±3.75%  ±4.88%
 http/check_invalid_header_char.js n=1000000 input='foo\\nbar'                                                     0.35 %       ±3.97%  ±5.28%  ±6.87%
 http/check_invalid_header_char.js n=1000000 input='group_acmeair'                                                 2.87 %       ±3.53%  ±4.70%  ±6.12%
 http/check_invalid_header_char.js n=1000000 input='gzip'                                                         -2.68 %       ±4.16%  ±5.56%  ±7.30%
 http/check_invalid_header_char.js n=1000000 input='keep-alive'                                                   -2.47 %       ±3.28%  ±4.37%  ±5.69%
 http/check_invalid_header_char.js n=1000000 input='LONG_AND_INVALID'                                              0.78 %       ±1.63%  ±2.17%  ±2.82%
 http/check_invalid_header_char.js n=1000000 input='private'                                                       0.72 %       ±4.81%  ±6.40%  ±8.32%
 http/check_invalid_header_char.js n=1000000 input='SAMEORIGIN'                                                   -2.51 %       ±4.52%  ±6.02%  ±7.83%
 http/check_invalid_header_char.js n=1000000 input='Sat, 07 May 2016 16:54:48 GMT'                                -1.20 %       ±2.67%  ±3.56%  ±4.63%
 http/check_invalid_header_char.js n=1000000 input='text/html; charset=utf-8'                                     -2.47 %       ±3.31%  ±4.41%  ±5.75%
 http/check_invalid_header_char.js n=1000000 input='text/plain'                                                   -2.41 %       ±3.59%  ±4.80%  ±6.28%
 http/check_invalid_header_char.js n=1000000 input='中文呢'                                                        3.52 %       ±5.45%  ±7.26%  ±9.45%
 http/check_is_http_token.js n=1000000 key=':'                                                                    -4.07 %       ±4.10%  ±5.46%  ±7.14%
 http/check_is_http_token.js n=1000000 key=':alternate-protocol'                                                   2.16 %       ±4.08%  ±5.44%  ±7.08%
 http/check_is_http_token.js n=1000000 key='((((())))'                                                            -2.43 %       ±4.93%  ±6.58%  ±8.62%
 http/check_is_http_token.js n=1000000 key='@@'                                                                   -4.78 %       ±5.04%  ±6.71%  ±8.75%
 http/check_is_http_token.js n=1000000 key='Accept-Ranges'                                                  *     -3.31 %       ±3.28%  ±4.37%  ±5.71%
 http/check_is_http_token.js n=1000000 key='alt-svc'                                                              -0.77 %       ±5.09%  ±6.77%  ±8.82%
 http/check_is_http_token.js n=1000000 key='alternate-protocol:'                                                  -2.09 %       ±3.40%  ±4.53%  ±5.90%
 http/check_is_http_token.js n=1000000 key='alternate-protocol'                                                   -0.45 %       ±3.58%  ±4.77%  ±6.21%
 http/check_is_http_token.js n=1000000 key='Cache-Control'                                                         0.93 %       ±3.82%  ±5.09%  ±6.64%
 http/check_is_http_token.js n=1000000 key='Connection'                                                            0.78 %       ±2.90%  ±3.87%  ±5.04%
 http/check_is_http_token.js n=1000000 key='Content-Encoding'                                                     -0.10 %       ±4.09%  ±5.44%  ±7.09%
 http/check_is_http_token.js n=1000000 key='content-length'                                                        0.90 %       ±3.09%  ±4.11%  ±5.35%
 http/check_is_http_token.js n=1000000 key='Content-Location'                                                     -2.43 %       ±3.52%  ±4.69%  ±6.12%
 http/check_is_http_token.js n=1000000 key='content-type'                                                          0.62 %       ±3.99%  ±5.31%  ±6.92%
 http/check_is_http_token.js n=1000000 key='Content-Type'                                                         -1.97 %       ±3.75%  ±5.01%  ±6.55%
 http/check_is_http_token.js n=1000000 key='date'                                                                 -2.65 %       ±3.30%  ±4.40%  ±5.74%
 http/check_is_http_token.js n=1000000 key='ETag'                                                                  0.42 %       ±3.53%  ±4.70%  ±6.11%
 http/check_is_http_token.js n=1000000 key='Expires'                                                               0.31 %       ±4.69%  ±6.25%  ±8.16%
 http/check_is_http_token.js n=1000000 key='Keep-Alive'                                                            1.40 %       ±3.53%  ±4.70%  ±6.12%
 http/check_is_http_token.js n=1000000 key='Last-Modified'                                                        -0.36 %       ±4.07%  ±5.42%  ±7.06%
 http/check_is_http_token.js n=1000000 key='location'                                                             -0.42 %       ±3.87%  ±5.16%  ±6.71%
 http/check_is_http_token.js n=1000000 key='server'                                                                0.08 %       ±4.25%  ±5.66%  ±7.37%
 http/check_is_http_token.js n=1000000 key='Server'                                                               -0.40 %       ±3.80%  ±5.06%  ±6.59%
 http/check_is_http_token.js n=1000000 key='status'                                                                0.71 %       ±3.42%  ±4.56%  ±5.93%
 http/check_is_http_token.js n=1000000 key='TCN'                                                                   1.65 %       ±3.47%  ±4.63%  ±6.04%
 http/check_is_http_token.js n=1000000 key='Transfer-Encoding'                                                    -1.15 %       ±3.84%  ±5.11%  ±6.66%
 http/check_is_http_token.js n=1000000 key='Vary'                                                                  2.70 %       ±4.98%  ±6.64%  ±8.67%
 http/check_is_http_token.js n=1000000 key='version'                                                              -1.33 %       ±3.80%  ±5.06%  ±6.58%
 http/check_is_http_token.js n=1000000 key='x-frame-options'                                                      -0.02 %       ±3.53%  ±4.70%  ±6.13%
 http/check_is_http_token.js n=1000000 key='x-xss-protection'                                                     -0.44 %       ±3.61%  ±4.80%  ±6.26%
 http/check_is_http_token.js n=1000000 key='中文呢'                                                               -0.38 %       ±5.85%  ±7.78% ±10.13%
 http/chunked.js duration=5 c=100 len=1 n=1 benchmarker='wrk'                                                     -0.01 %       ±0.10%  ±0.13%  ±0.17%
 http/chunked.js duration=5 c=100 len=1 n=16 benchmarker='wrk'                                                    -0.39 %       ±0.65%  ±0.86%  ±1.13%
 http/chunked.js duration=5 c=100 len=1 n=4 benchmarker='wrk'                                                     -0.05 %       ±0.19%  ±0.25%  ±0.32%
 http/chunked.js duration=5 c=100 len=1 n=8 benchmarker='wrk'                                                     -0.02 %       ±0.22%  ±0.30%  ±0.39%
 http/chunked.js duration=5 c=100 len=256 n=1 benchmarker='wrk'                                                    0.03 %       ±0.11%  ±0.15%  ±0.20%
 http/chunked.js duration=5 c=100 len=256 n=16 benchmarker='wrk'                                                  -0.12 %       ±1.04%  ±1.38%  ±1.81%
 http/chunked.js duration=5 c=100 len=256 n=4 benchmarker='wrk'                                                   -0.02 %       ±0.16%  ±0.22%  ±0.28%
 http/chunked.js duration=5 c=100 len=256 n=8 benchmarker='wrk'                                                   -0.05 %       ±0.26%  ±0.34%  ±0.44%
 http/chunked.js duration=5 c=100 len=64 n=1 benchmarker='wrk'                                                    -0.09 %       ±0.11%  ±0.15%  ±0.20%
 http/chunked.js duration=5 c=100 len=64 n=16 benchmarker='wrk'                                                   -0.27 %       ±0.80%  ±1.06%  ±1.38%
 http/chunked.js duration=5 c=100 len=64 n=4 benchmarker='wrk'                                                    -0.03 %       ±0.16%  ±0.22%  ±0.28%
 http/chunked.js duration=5 c=100 len=64 n=8 benchmarker='wrk'                                                     0.12 %       ±0.23%  ±0.31%  ±0.41%
 http/client-request-body.js method='end' len=1024 type='asc' dur=5                                               -5.73 %       ±7.78% ±10.35% ±13.47%
 http/client-request-body.js method='end' len=1024 type='buf' dur=5                                               -0.64 %       ±9.24% ±12.29% ±16.00%
 http/client-request-body.js method='end' len=1024 type='utf' dur=5                                               -0.17 %       ±8.27% ±11.01% ±14.35%
 http/client-request-body.js method='end' len=256 type='asc' dur=5                                                -0.39 %       ±9.31% ±12.39% ±16.14%
 http/client-request-body.js method='end' len=256 type='buf' dur=5                                                -3.67 %      ±10.64% ±14.16% ±18.43%
 http/client-request-body.js method='end' len=256 type='utf' dur=5                                                -1.92 %       ±9.02% ±12.01% ±15.63%
 http/client-request-body.js method='end' len=32 type='asc' dur=5                                                  8.06 %       ±9.16% ±12.18% ±15.86%
 http/client-request-body.js method='end' len=32 type='buf' dur=5                                                 -6.80 %       ±8.61% ±11.45% ±14.91%
 http/client-request-body.js method='end' len=32 type='utf' dur=5                                                 -3.84 %       ±9.26% ±12.32% ±16.04%
 http/client-request-body.js method='write' len=1024 type='asc' dur=5                                              3.75 %       ±8.85% ±11.78% ±15.33%
 http/client-request-body.js method='write' len=1024 type='buf' dur=5                                             -3.37 %       ±8.63% ±11.49% ±14.97%
 http/client-request-body.js method='write' len=1024 type='utf' dur=5                                              0.34 %       ±8.67% ±11.53% ±15.01%
 http/client-request-body.js method='write' len=256 type='asc' dur=5                                               3.52 %       ±9.79% ±13.02% ±16.95%
 http/client-request-body.js method='write' len=256 type='buf' dur=5                                              -2.70 %       ±9.81% ±13.06% ±17.00%
 http/client-request-body.js method='write' len=256 type='utf' dur=5                                               6.57 %       ±9.30% ±12.37% ±16.11%
 http/client-request-body.js method='write' len=32 type='asc' dur=5                                                2.90 %       ±8.93% ±11.88% ±15.46%
 http/client-request-body.js method='write' len=32 type='buf' dur=5                                               -6.35 %       ±8.11% ±10.80% ±14.07%
 http/client-request-body.js method='write' len=32 type='utf' dur=5                                                5.36 %       ±9.97% ±13.27% ±17.28%
 http/cluster.js duration=5 c=50 len=1024 type='buffer' benchmarker='wrk'                                         -3.38 %       ±4.48%  ±5.94%  ±7.69%
 http/cluster.js duration=5 c=50 len=1024 type='bytes' benchmarker='wrk'                                          -2.24 %       ±4.18%  ±5.54%  ±7.16%
 http/cluster.js duration=5 c=50 len=102400 type='buffer' benchmarker='wrk'                                       -0.83 %       ±3.13%  ±4.15%  ±5.37%
 http/cluster.js duration=5 c=50 len=102400 type='bytes' benchmarker='wrk'                                        -1.19 %       ±3.22%  ±4.27%  ±5.53%
 http/cluster.js duration=5 c=50 len=4 type='buffer' benchmarker='wrk'                                      *     -4.28 %       ±4.00%  ±5.30%  ±6.86%
 http/cluster.js duration=5 c=50 len=4 type='bytes' benchmarker='wrk'                                      **     -6.37 %       ±4.60%  ±6.10%  ±7.89%
 http/cluster.js duration=5 c=500 len=1024 type='buffer' benchmarker='wrk'                                  *     -2.52 %       ±2.46%  ±3.27%  ±4.24%
 http/cluster.js duration=5 c=500 len=1024 type='bytes' benchmarker='wrk'                                         -1.79 %       ±2.46%  ±3.26%  ±4.23%
 http/cluster.js duration=5 c=500 len=102400 type='buffer' benchmarker='wrk'                                      -0.80 %       ±2.45%  ±3.25%  ±4.21%
 http/cluster.js duration=5 c=500 len=102400 type='bytes' benchmarker='wrk'                                       -2.96 %       ±3.11%  ±4.12%  ±5.34%
 http/cluster.js duration=5 c=500 len=4 type='buffer' benchmarker='wrk'                                            0.12 %       ±2.44%  ±3.24%  ±4.19%
 http/cluster.js duration=5 c=500 len=4 type='bytes' benchmarker='wrk'                                            -1.49 %       ±2.36%  ±3.13%  ±4.06%
 http/create-clientrequest.js e=1 arg='options' url='idn'                                                          7.43 %      ±11.59% ±15.65% ±20.81%
 http/create-clientrequest.js e=1 arg='options' url='long'                                                         2.27 %      ±10.66% ±14.46% ±19.39%
 http/create-clientrequest.js e=1 arg='options' url='wpt'                                                         10.96 %      ±16.28% ±22.17% ±29.90%
 http/create-clientrequest.js e=1 arg='string' url='idn'                                                           0.25 %       ±8.43% ±11.37% ±15.13%
 http/create-clientrequest.js e=1 arg='string' url='long'                                                         -4.00 %      ±10.76% ±14.51% ±19.30%
 http/create-clientrequest.js e=1 arg='string' url='wpt'                                                           2.06 %       ±5.18%  ±6.99%  ±9.29%
 http/create-clientrequest.js e=1 arg='URL' url='idn'                                                              1.40 %       ±8.05% ±10.86% ±14.46%
 http/create-clientrequest.js e=1 arg='URL' url='long'                                                             3.65 %       ±9.16% ±12.39% ±16.54%
 http/create-clientrequest.js e=1 arg='URL' url='wpt'                                                              5.31 %       ±9.41% ±12.70% ±16.89%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='asc' benchmarker='wrk'                   1.01 %       ±3.63%  ±4.90%  ±6.53%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='buf' benchmarker='wrk'                  -5.52 %      ±11.69% ±15.78% ±20.98%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='utf' benchmarker='wrk'                  -0.24 %       ±2.14%  ±2.89%  ±3.84%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='asc' benchmarker='wrk'                   -2.00 %       ±5.23%  ±7.06%  ±9.40%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='buf' benchmarker='wrk'                   -3.27 %       ±5.41%  ±7.30%  ±9.71%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='utf' benchmarker='wrk'                    0.88 %       ±1.85%  ±2.50%  ±3.32%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='asc' benchmarker='wrk'                    0.23 %       ±2.52%  ±3.41%  ±4.57%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='buf' benchmarker='wrk'                   -0.44 %       ±6.95%  ±9.39% ±12.52%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='utf' benchmarker='wrk'                    1.30 %       ±2.38%  ±3.22%  ±4.29%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='asc' benchmarker='wrk'                    -1.55 %       ±3.58%  ±4.84%  ±6.44%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='buf' benchmarker='wrk'             **     -4.37 %       ±2.94%  ±3.97%  ±5.29%
 http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='utf' benchmarker='wrk'                    -1.75 %       ±2.25%  ±3.06%  ±4.12%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='asc' benchmarker='wrk'                -1.43 %       ±9.01% ±12.15% ±16.15%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='buf' benchmarker='wrk'                 3.87 %      ±13.34% ±18.00% ±23.94%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='utf' benchmarker='wrk'                 6.53 %       ±9.06% ±12.25% ±16.33%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='asc' benchmarker='wrk'                 -2.83 %       ±4.84%  ±6.54%  ±8.70%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='buf' benchmarker='wrk'                  0.64 %       ±3.81%  ±5.15%  ±6.86%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='utf' benchmarker='wrk'                 -5.93 %       ±7.09%  ±9.64% ±12.97%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='asc' benchmarker='wrk'                  0.33 %       ±7.05%  ±9.51% ±12.65%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='buf' benchmarker='wrk'                 -2.56 %       ±8.48% ±11.44% ±15.21%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='utf' benchmarker='wrk'                 -3.10 %       ±7.14%  ±9.63% ±12.81%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='asc' benchmarker='wrk'                   0.49 %       ±3.65%  ±4.92%  ±6.54%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='buf' benchmarker='wrk'                  -1.01 %       ±3.34%  ±4.51%  ±5.99%
 http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='utf' benchmarker='wrk'                  -1.95 %       ±3.82%  ±5.16%  ±6.87%
 http/headers.js duration=5 len=1 n=10 benchmarker='wrk'                                                           1.60 %       ±7.09%  ±9.56% ±12.72%
 http/headers.js duration=5 len=1 n=1000 benchmarker='wrk'                                                         1.48 %       ±3.95%  ±5.34%  ±7.10%
 http/headers.js duration=5 len=100 n=10 benchmarker='wrk'                                                        -2.46 %       ±6.24%  ±8.46% ±11.33%
 http/headers.js duration=5 len=100 n=1000 benchmarker='wrk'                                                       1.79 %       ±5.47%  ±7.38%  ±9.81%
 http/http_server_for_chunky_client.js type='send' n=2000 len=1                                                    4.66 %       ±5.85%  ±7.91% ±10.56%
 http/http_server_for_chunky_client.js type='send' n=2000 len=128                                                  0.83 %       ±9.58% ±12.93% ±17.20%
 http/http_server_for_chunky_client.js type='send' n=2000 len=16                                                   0.36 %      ±12.94% ±17.47% ±23.25%
 http/http_server_for_chunky_client.js type='send' n=2000 len=32                                                  -4.32 %      ±11.41% ±15.40% ±20.48%
 http/http_server_for_chunky_client.js type='send' n=2000 len=4                                                   -2.33 %      ±14.96% ±20.19% ±26.85%
 http/http_server_for_chunky_client.js type='send' n=2000 len=64                                                  -2.30 %      ±11.21% ±15.13% ±20.12%
 http/http_server_for_chunky_client.js type='send' n=2000 len=8                                                    2.07 %      ±14.60% ±19.69% ±26.19%
 http/http_server_for_chunky_client.js type='send' n=5 len=1                                                       0.57 %       ±7.59% ±10.33% ±13.93%
 http/http_server_for_chunky_client.js type='send' n=5 len=128                                                     5.09 %       ±9.17% ±12.40% ±16.54%
 http/http_server_for_chunky_client.js type='send' n=5 len=16                                                      0.15 %      ±15.11% ±20.57% ±27.75%
 http/http_server_for_chunky_client.js type='send' n=5 len=32                                               *      8.02 %       ±7.95% ±10.81% ±14.56%
 http/http_server_for_chunky_client.js type='send' n=5 len=4                                                       4.09 %      ±10.69% ±14.64% ±19.93%
 http/http_server_for_chunky_client.js type='send' n=5 len=64                                                      0.95 %       ±6.11%  ±8.25% ±10.98%
 http/http_server_for_chunky_client.js type='send' n=5 len=8                                                       1.69 %       ±8.86% ±11.96% ±15.91%
 http/http_server_for_chunky_client.js type='send' n=50 len=1                                                     -2.66 %       ±7.95% ±10.73% ±14.29%
 http/http_server_for_chunky_client.js type='send' n=50 len=128                                                    4.24 %       ±8.43% ±11.37% ±15.12%
 http/http_server_for_chunky_client.js type='send' n=50 len=16                                                     2.73 %       ±9.41% ±12.74% ±17.01%
 http/http_server_for_chunky_client.js type='send' n=50 len=32                                                    -2.86 %       ±8.48% ±11.47% ±15.32%
 http/http_server_for_chunky_client.js type='send' n=50 len=4                                                     -0.33 %      ±11.71% ±15.84% ±21.17%
 http/http_server_for_chunky_client.js type='send' n=50 len=64                                                     0.16 %      ±12.71% ±17.26% ±23.17%
 http/http_server_for_chunky_client.js type='send' n=50 len=8                                                     -0.24 %       ±9.86% ±13.31% ±17.71%
 http/http_server_for_chunky_client.js type='send' n=500 len=1                                                     0.63 %       ±5.36%  ±7.24%  ±9.62%
 http/http_server_for_chunky_client.js type='send' n=500 len=128                                                  -5.12 %      ±10.70% ±14.47% ±19.32%
 http/http_server_for_chunky_client.js type='send' n=500 len=16                                             *      8.72 %       ±6.70%  ±9.05% ±12.03%
 http/http_server_for_chunky_client.js type='send' n=500 len=32                                                   -1.35 %      ±10.66% ±14.45% ±19.36%
 http/http_server_for_chunky_client.js type='send' n=500 len=4                                                     1.69 %       ±8.95% ±12.11% ±16.16%
 http/http_server_for_chunky_client.js type='send' n=500 len=64                                                   -3.36 %       ±7.51% ±10.13% ±13.48%
 http/http_server_for_chunky_client.js type='send' n=500 len=8                                                     0.40 %       ±8.03% ±10.83% ±14.41%
 http/incoming_headers.js duration=5 w=0 headers=20 connections=50 benchmarker='wrk'                              -0.07 %       ±8.46% ±11.41% ±15.17%
 http/incoming_headers.js duration=5 w=6 headers=20 connections=50 benchmarker='wrk'                              -5.94 %       ±5.95%  ±8.03% ±10.67%
 http/set_header.js n=1000000 value='Connection'                                                                   0.01 %       ±2.40%  ±3.24%  ±4.31%
 http/set_header.js n=1000000 value='Content-Length'                                                              -1.37 %       ±1.59%  ±2.14%  ±2.85%
 http/set_header.js n=1000000 value='Content-Type'                                                                -0.89 %       ±2.09%  ±2.82%  ±3.75%
 http/set_header.js n=1000000 value='Set-Cookie'                                                                  -0.29 %       ±2.13%  ±2.87%  ±3.82%
 http/set_header.js n=1000000 value='Transfer-Encoding'                                                    **     -2.18 %       ±1.57%  ±2.12%  ±2.82%
 http/set_header.js n=1000000 value='Vary'                                                                        -1.71 %       ±2.02%  ±2.72%  ±3.63%
 http/set_header.js n=1000000 value='X-Powered-By'                                                                -1.58 %       ±2.33%  ±3.15%  ±4.19%
 http/set-header.js duration=5 res='normal' benchmarker='wrk'                                               *     -6.59 %       ±6.35%  ±8.58% ±11.44%
 http/set-header.js duration=5 res='setHeader' benchmarker='wrk'                                                  -3.75 %       ±5.56%  ±7.51%  ±9.98%
 http/set-header.js duration=5 res='setHeaderWH' benchmarker='wrk'                                                 0.83 %       ±4.66%  ±6.29%  ±8.37%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=1024 type='buffer' benchmarker='wrk'                    -2.15 %       ±6.49%  ±9.32% ±13.73%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=1024 type='bytes' benchmarker='wrk'                      0.85 %       ±7.59% ±10.92% ±16.11%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=102400 type='buffer' benchmarker='wrk'                   9.37 %      ±11.49% ±16.98% ±26.21%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=102400 type='bytes' benchmarker='wrk'                   -4.55 %       ±5.71%  ±8.26% ±12.32%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=4 type='buffer' benchmarker='wrk'                        1.62 %      ±10.72% ±16.09% ±25.47%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=1 len=4 type='bytes' benchmarker='wrk'                        -2.31 %      ±12.52% ±17.49% ±24.56%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=1024 type='buffer' benchmarker='wrk'                     1.72 %      ±14.60% ±25.05% ±49.61%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=1024 type='bytes' benchmarker='wrk'                     -0.95 %      ±12.28% ±18.95% ±31.43%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=102400 type='buffer' benchmarker='wrk'                  -5.68 %       ±8.47% ±12.40% ±18.81%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=102400 type='bytes' benchmarker='wrk'                    2.01 %       ±7.82% ±11.84% ±19.02%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=4 type='buffer' benchmarker='wrk'                 *    -10.72 %       ±7.53% ±10.83% ±15.98%
 http/simple.js duration=5 chunkedEnc=0 c=50 chunks=4 len=4 type='bytes' benchmarker='wrk'                        -3.73 %       ±7.06%  ±9.92% ±14.08%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=1024 type='buffer' benchmarker='wrk'                    5.80 %      ±10.71% ±16.39% ±26.79%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=1024 type='bytes' benchmarker='wrk'                    -2.44 %       ±7.62% ±11.01% ±16.32%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=102400 type='buffer' benchmarker='wrk'                  5.65 %       ±8.97% ±13.23% ±20.32%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=102400 type='bytes' benchmarker='wrk'                  -3.31 %       ±4.79%  ±6.76%  ±9.66%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=4 type='buffer' benchmarker='wrk'                      -4.86 %       ±9.78% ±14.10% ±20.85%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=1 len=4 type='bytes' benchmarker='wrk'                       -0.00 %       ±9.10% ±12.73% ±17.95%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=1024 type='buffer' benchmarker='wrk'                   -4.25 %       ±9.19% ±13.40% ±20.17%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=1024 type='bytes' benchmarker='wrk'                     2.13 %      ±15.70% ±23.11% ±35.39%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=102400 type='buffer' benchmarker='wrk'                  6.96 %      ±20.30% ±37.18% ±82.00%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=102400 type='bytes' benchmarker='wrk'                  -0.12 %      ±12.12% ±17.38% ±25.48%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=4 type='buffer' benchmarker='wrk'                      -8.79 %       ±8.84% ±12.70% ±18.68%
 http/simple.js duration=5 chunkedEnc=0 c=500 chunks=4 len=4 type='bytes' benchmarker='wrk'                       -2.21 %       ±9.42% ±13.15% ±18.45%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=1024 type='buffer' benchmarker='wrk'                     8.09 %      ±10.81% ±15.59% ±23.05%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=1024 type='bytes' benchmarker='wrk'                     -8.46 %       ±8.51% ±11.87% ±16.63%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=102400 type='buffer' benchmarker='wrk'                   4.00 %       ±8.14% ±11.89% ±17.98%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=102400 type='bytes' benchmarker='wrk'                    2.50 %       ±6.42%  ±9.61% ±15.16%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=4 type='buffer' benchmarker='wrk'                       -1.44 %       ±5.89%  ±8.58% ±12.92%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=1 len=4 type='bytes' benchmarker='wrk'                         2.91 %       ±9.56% ±13.45% ±19.11%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=1024 type='buffer' benchmarker='wrk'                    -3.53 %      ±13.75% ±23.91% ±48.37%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=1024 type='bytes' benchmarker='wrk'                      6.98 %       ±9.64% ±13.71% ±19.82%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=102400 type='buffer' benchmarker='wrk'                  -1.33 %      ±10.62% ±19.00% ±40.32%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=102400 type='bytes' benchmarker='wrk'                   -2.72 %       ±6.71% ±10.11% ±16.09%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=4 type='buffer' benchmarker='wrk'                       -7.02 %       ±8.23% ±11.86% ±17.55%
 http/simple.js duration=5 chunkedEnc=1 c=50 chunks=4 len=4 type='bytes' benchmarker='wrk'                        -1.74 %       ±7.81% ±10.89% ±15.28%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=1024 type='buffer' benchmarker='wrk'                   -7.60 %      ±21.43% ±36.84% ±73.16%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=1024 type='bytes' benchmarker='wrk'                     6.71 %       ±8.39% ±11.88% ±17.05%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=102400 type='buffer' benchmarker='wrk'                 -4.17 %      ±17.84% ±33.14% ±74.79%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=102400 type='bytes' benchmarker='wrk'                   1.25 %       ±7.20% ±10.18% ±14.59%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=4 type='buffer' benchmarker='wrk'                      -4.41 %       ±9.77% ±14.51% ±22.53%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=1 len=4 type='bytes' benchmarker='wrk'                        1.44 %       ±6.32%  ±8.82% ±12.38%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=1024 type='buffer' benchmarker='wrk'                   -5.70 %      ±12.46% ±19.59% ±33.51%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=1024 type='bytes' benchmarker='wrk'                    -4.48 %       ±5.95%  ±8.41% ±12.04%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=102400 type='buffer' benchmarker='wrk'                  5.90 %      ±15.59% ±26.75% ±52.96%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=102400 type='bytes' benchmarker='wrk'                  -1.64 %       ±6.88%  ±9.71% ±13.89%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=4 type='buffer' benchmarker='wrk'                      -0.03 %       ±9.04% ±13.08% ±19.48%
 http/simple.js duration=5 chunkedEnc=1 c=500 chunks=4 len=4 type='bytes' benchmarker='wrk'                        0.28 %       ±4.93%  ±6.90%  ±9.73%
 http/upgrade.js n=1000                                                                                           -3.43 %       ±6.29%  ±8.38% ±10.91%
 http/upgrade.js n=5                                                                                              -2.12 %       ±2.86%  ±3.80%  ±4.96%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 222 comparisons, you can thus
expect the following amount of false-positive results:
  11.10 false positives, when considering a   5% risk acceptance (*, **, ***),
  2.22 false positives, when considering a   1% risk acceptance (**, ***),
  0.22 false positives, when considering a 0.1% risk acceptance (***)

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35115/

[aduh95]

Landed in 8cf5ae0

[MylesBorins]

hey @aduh95, this PR does not land cleanly on v15.x. Would you be able to backport?