events: refactor to use primordials in lib/events

[marsonya]

Replace code that's vulnerable to Prototype Pollution with Primordials.

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/993/

[jasnell]

Benchmarks should be checked on this before landing

[aduh95]

Some significant perf regressions:

                                                         confidence improvement accuracy (*)   (**)  (***)
events/ee-add-remove.jsn=1000000                                ***    -27.64 %       ±3.09% ±4.13% ±5.40%
events/ee-emit.jslisteners=10 argc=0 n=2000000                           0.28 %       ±1.22% ±1.63% ±2.12%
events/ee-emit.jslisteners=10 argc=10 n=2000000                          0.44 %       ±1.47% ±1.96% ±2.58%
events/ee-emit.jslisteners=10 argc=2 n=2000000                           0.37 %       ±1.27% ±1.69% ±2.20%
events/ee-emit.jslisteners=10 argc=4 n=2000000                           0.04 %       ±1.07% ±1.43% ±1.86%
events/ee-emit.jslisteners=1 argc=0 n=2000000                           -2.06 %       ±2.67% ±3.55% ±4.62%
events/ee-emit.jslisteners=1 argc=10 n=2000000                          -1.66 %       ±3.41% ±4.54% ±5.91%
events/ee-emit.jslisteners=1 argc=2 n=2000000                           -4.38 %       ±4.59% ±6.11% ±7.96%
events/ee-emit.jslisteners=1 argc=4 n=2000000                           -1.97 %       ±3.47% ±4.63% ±6.03%
events/ee-emit.jslisteners=5 argc=0 n=2000000                           -0.08 %       ±2.29% ±3.04% ±3.96%
events/ee-emit.jslisteners=5 argc=10 n=2000000                          -0.77 %       ±1.88% ±2.51% ±3.26%
events/ee-emit.jslisteners=5 argc=2 n=2000000                           -0.76 %       ±1.97% ±2.63% ±3.43%
events/ee-emit.jslisteners=5 argc=4 n=2000000                           -0.21 %       ±2.09% ±2.78% ±3.62%
events/ee-listener-count-on-prototype.jsn=50000000                *     -5.06 %       ±4.62% ±6.21% ±8.20%
events/ee-listeners.jsraw='false' listeners=50 n=5000000                 1.91 %       ±3.18% ±4.26% ±5.58%
events/ee-listeners.jsraw='false' listeners=5 n=5000000                 -1.18 %       ±3.36% ±4.50% ±5.91%
events/ee-listeners.jsraw='true' listeners=50 n=5000000                  1.67 %       ±2.85% ±3.80% ±4.98%
events/ee-listeners.jsraw='true' listeners=5 n=5000000                   2.24 %       ±3.54% ±4.71% ±6.14%
events/ee-once.jsargc=0 n=20000000                              ***     -6.95 %       ±1.40% ±1.86% ±2.43%
events/ee-once.jsargc=1 n=20000000                              ***     -9.55 %       ±1.17% ±1.56% ±2.03%
events/ee-once.jsargc=4 n=20000000                              ***     -9.36 %       ±4.11% ±5.47% ±7.12%
events/ee-once.jsargc=5 n=20000000                              ***     -8.47 %       ±2.74% ±3.64% ±4.74%
events/eventtarget.jslisteners=10 n=1000000                       *      3.56 %       ±3.01% ±4.02% ±5.28%
events/eventtarget.jslisteners=1 n=1000000                              -3.34 %       ±4.28% ±5.74% ±7.54%
events/eventtarget.jslisteners=5 n=1000000                               0.94 %       ±2.38% ±3.16% ±4.12%

[mcollina]

I'm -1 to land this with regressions.

Need the perf regressions figured out

[marsonya]

These are the primordials causing the Regressions in my previous commit

ArrayPrototypeUnshift and ArrayPrototypePush in _addListener()
FunctionPrototypeCall and ReflectApply in onceWrapper()
FunctionPrototypeBind in _onceWrap()
ArrayPrototypeShift in removeListener()
ArrayPrototypeShift in on()

I have removed these and benchmarked events again (locally on my computer).
The regressions are gone.

Kindly re-run benchmarks once again.

[marsonya]

These are the primordials causing the Regressions in my previous commit

ArrayPrototypeUnshift and ArrayPrototypePush in _addListener()
FunctionPrototypeCall and ReflectApply in onceWrapper()
FunctionPrototypeBind in _onceWrap()
ArrayPrototypeShift in removeListener()
ArrayPrototypeShift in on()

I have removed these and benchmarked events again (locally on my computer).
The regressions are gone.

Kindly re-run benchmarks once again.

Sorry for leaving a review instead of comment.
I tried deleting it and reposting it. Couldn't delete the review.

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1010/

[RaisinTen]

There does not seem to be any significant performance regressions in the bechmark run.

Details

14:30:14                                                           confidence improvement accuracy (*)    (**)   (***)
14:30:15 events/ee-add-remove.js n=1000000                                        -1.98 %       ±5.20%  ±6.92%  ±9.01%
14:30:15 events/ee-emit.js listeners=10 argc=0 n=2000000                           0.07 %       ±1.19%  ±1.58%  ±2.06%
14:30:15 events/ee-emit.js listeners=10 argc=10 n=2000000                          1.95 %       ±3.77%  ±5.05%  ±6.64%
14:30:15 events/ee-emit.js listeners=10 argc=2 n=2000000                           0.08 %       ±0.81%  ±1.08%  ±1.40%
14:30:15 events/ee-emit.js listeners=10 argc=4 n=2000000                           0.40 %       ±0.98%  ±1.30%  ±1.69%
14:30:15 events/ee-emit.js listeners=1 argc=0 n=2000000                            1.63 %       ±4.24%  ±5.64%  ±7.34%
14:30:15 events/ee-emit.js listeners=1 argc=10 n=2000000                          -0.60 %       ±3.49%  ±4.64%  ±6.04%
14:30:15 events/ee-emit.js listeners=1 argc=2 n=2000000                           -1.54 %       ±4.00%  ±5.32%  ±6.93%
14:30:15 events/ee-emit.js listeners=1 argc=4 n=2000000                           -5.19 %       ±7.62% ±10.23% ±13.53%
14:30:15 events/ee-emit.js listeners=5 argc=0 n=2000000                           -1.80 %       ±2.15%  ±2.86%  ±3.73%
14:30:15 events/ee-emit.js listeners=5 argc=10 n=2000000                          -0.44 %       ±2.13%  ±2.83%  ±3.69%
14:30:15 events/ee-emit.js listeners=5 argc=2 n=2000000                            0.56 %       ±2.15%  ±2.86%  ±3.73%
14:30:15 events/ee-emit.js listeners=5 argc=4 n=2000000                           -1.72 %       ±2.54%  ±3.38%  ±4.40%
14:30:15 events/ee-listener-count-on-prototype.js n=50000000                       0.19 %       ±5.10%  ±6.79%  ±8.85%
14:30:15 events/ee-listeners.js raw='false' listeners=50 n=5000000                 0.57 %       ±1.29%  ±1.72%  ±2.23%
14:30:15 events/ee-listeners.js raw='false' listeners=5 n=5000000                  0.65 %       ±1.37%  ±1.82%  ±2.37%
14:30:15 events/ee-listeners.js raw='true' listeners=50 n=5000000                 -2.61 %       ±3.80%  ±5.10%  ±6.73%
14:30:15 events/ee-listeners.js raw='true' listeners=5 n=5000000                  -1.70 %       ±5.65%  ±7.58%  ±9.99%
14:30:15 events/ee-once.js argc=0 n=20000000                                       1.25 %       ±1.45%  ±1.94%  ±2.54%
14:30:15 events/ee-once.js argc=1 n=20000000                                      -1.49 %       ±2.15%  ±2.88%  ±3.79%
14:30:15 events/ee-once.js argc=4 n=20000000                                      -0.29 %       ±1.31%  ±1.75%  ±2.28%
14:30:15 events/ee-once.js argc=5 n=20000000                                       0.09 %       ±1.34%  ±1.79%  ±2.32%
14:30:15 events/eventtarget.js listeners=10 n=1000000                              0.94 %       ±2.36%  ±3.15%  ±4.10%
14:30:15 events/eventtarget.js listeners=1 n=1000000                               0.07 %       ±1.75%  ±2.34%  ±3.05%
14:30:15 events/eventtarget.js listeners=5 n=1000000                        *      7.80 %       ±6.65%  ±8.95% ±11.85%

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/37534/

[aduh95]

Benchmark results look promising! It's probably a good idea to wait for #38248 to land first as it's going to create conflicts and we want to include it in the v16.0.0 release.

[aduh95]

Once this has been rebased on top of #38248 (after it has landed), we should also run HTTP benchmark to make sure we're not introducing hidden perf regressions.

[marsonya]

Benchmark results look promising! It's probably a good idea to wait for #38248 to land first as it's going to create conflicts and we want to include it in the v16.0.0 release.

#38248 has landed. can we proceed with this change?

[mcollina]

We need to validate that http did not regress.

[aduh95]

@marsonya if you want to rebase on top of master to fix the git conflict, we can spawn some benchmarks to see where this PR stands in term of perf regressions/improvment.

[aduh95]

Benchmark CI (events): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1019/
Benchmark CI (http/client-request-body): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1020/ (queued)
Benchmark CI (http/end-vs-write-end): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1026/ (queued)
Benchmark CI (http/*header*): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1022/ (queued)
Benchmark CI (http/upgrade): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1023/ (queued)
Benchmark CI (http/check*): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1024/ (queued)
Benchmark CI (http/simple): https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1025/ (failed)

Results

                                                                 confidence improvement accuracy (*)   (**)   (***)
events/ee-add-remove.js n=1000000 removeListener=0 newListener=0                 1.41 %       ±2.72% ±3.65%  ±4.81%
events/ee-add-remove.js n=1000000 removeListener=0 newListener=1                -0.75 %       ±2.15% ±2.87%  ±3.75%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=0                -0.23 %       ±2.13% ±2.84%  ±3.70%
events/ee-add-remove.js n=1000000 removeListener=1 newListener=1                 1.49 %       ±3.19% ±4.25%  ±5.55%
events/ee-emit.js listeners=10 argc=0 n=2000000                                 -0.77 %       ±1.34% ±1.79%  ±2.32%
events/ee-emit.js listeners=10 argc=10 n=2000000                                -1.11 %       ±2.08% ±2.78%  ±3.66%
events/ee-emit.js listeners=10 argc=2 n=2000000                                 -1.29 %       ±2.52% ±3.39%  ±4.47%
events/ee-emit.js listeners=10 argc=4 n=2000000                                 -0.31 %       ±1.04% ±1.38%  ±1.79%
events/ee-emit.js listeners=1 argc=0 n=2000000                                  -1.38 %       ±3.99% ±5.33%  ±6.97%
events/ee-emit.js listeners=1 argc=10 n=2000000                                  1.47 %       ±5.93% ±7.93% ±10.39%
events/ee-emit.js listeners=1 argc=2 n=2000000                                  -1.31 %       ±4.75% ±6.34%  ±8.30%
events/ee-emit.js listeners=1 argc=4 n=2000000                                  -3.11 %       ±3.65% ±4.86%  ±6.33%
events/ee-emit.js listeners=5 argc=0 n=2000000                                   0.87 %       ±2.23% ±2.96%  ±3.86%
events/ee-emit.js listeners=5 argc=10 n=2000000                                  1.65 %       ±2.46% ±3.28%  ±4.27%
events/ee-emit.js listeners=5 argc=2 n=2000000                                   0.64 %       ±1.89% ±2.52%  ±3.27%
events/ee-emit.js listeners=5 argc=4 n=2000000                                  -0.06 %       ±1.99% ±2.66%  ±3.46%
events/ee-listener-count-on-prototype.js n=50000000                              1.08 %       ±3.71% ±4.94%  ±6.43%
events/ee-listeners.js raw='false' listeners=50 n=5000000                        0.59 %       ±2.46% ±3.28%  ±4.30%
events/ee-listeners.js raw='false' listeners=5 n=5000000                        -0.29 %       ±3.00% ±4.01%  ±5.26%
events/ee-listeners.js raw='true' listeners=50 n=5000000                        -2.70 %       ±5.11% ±6.86%  ±9.07%
events/ee-listeners.js raw='true' listeners=5 n=5000000                          3.39 %       ±4.46% ±5.94%  ±7.76%
events/ee-once.js argc=0 n=20000000                                              0.04 %       ±1.24% ±1.67%  ±2.20%
events/ee-once.js argc=1 n=20000000                                             -0.10 %       ±4.28% ±5.69%  ±7.41%
events/ee-once.js argc=4 n=20000000                                              0.38 %       ±1.53% ±2.06%  ±2.71%
events/ee-once.js argc=5 n=20000000                                              0.51 %       ±1.26% ±1.68%  ±2.21%
events/eventtarget.js listeners=10 n=1000000                                     1.54 %       ±7.18% ±9.55% ±12.43%
events/eventtarget.js listeners=1 n=1000000                                      3.55 %       ±6.82% ±9.08% ±11.82%
events/eventtarget.js listeners=5 n=1000000                                     -2.66 %       ±5.95% ±7.92% ±10.33%
                                                                     confidence improvement accuracy (*)    (**)   (***)
http/client-request-body.js method='end' len=1024 type='asc' dur=5                  -2.08 %       ±6.24%  ±8.30% ±10.80%
http/client-request-body.js method='end' len=1024 type='buf' dur=5                  -2.93 %       ±7.54% ±10.04% ±13.06%
http/client-request-body.js method='end' len=1024 type='utf' dur=5                  -2.02 %       ±6.33%  ±8.42% ±10.96%
http/client-request-body.js method='end' len=256 type='asc' dur=5                    0.76 %       ±7.37%  ±9.81% ±12.76%
http/client-request-body.js method='end' len=256 type='buf' dur=5                    0.62 %       ±6.90%  ±9.19% ±11.96%
http/client-request-body.js method='end' len=256 type='utf' dur=5                    4.99 %       ±7.03%  ±9.35% ±12.17%
http/client-request-body.js method='end' len=32 type='asc' dur=5                    -0.69 %       ±7.30%  ±9.72% ±12.65%
http/client-request-body.js method='end' len=32 type='buf' dur=5                     0.59 %       ±7.22%  ±9.61% ±12.51%
http/client-request-body.js method='end' len=32 type='utf' dur=5                     3.04 %       ±6.21%  ±8.27% ±10.76%
http/client-request-body.js method='write' len=1024 type='asc' dur=5                 0.42 %       ±6.92%  ±9.21% ±12.00%
http/client-request-body.js method='write' len=1024 type='buf' dur=5                 1.79 %       ±6.19%  ±8.24% ±10.73%
http/client-request-body.js method='write' len=1024 type='utf' dur=5                -4.16 %       ±5.91%  ±7.87% ±10.24%
http/client-request-body.js method='write' len=256 type='asc' dur=5                 -4.80 %       ±5.32%  ±7.08%  ±9.22%
http/client-request-body.js method='write' len=256 type='buf' dur=5                 -3.92 %       ±6.94%  ±9.23% ±12.02%
http/client-request-body.js method='write' len=256 type='utf' dur=5                 -0.06 %       ±6.99%  ±9.30% ±12.11%
http/client-request-body.js method='write' len=32 type='asc' dur=5                  -0.17 %       ±6.23%  ±8.29% ±10.79%
http/client-request-body.js method='write' len=32 type='buf' dur=5                  -3.22 %       ±5.71%  ±7.60%  ±9.89%
http/client-request-body.js method='write' len=32 type='utf' dur=5                   2.09 %       ±6.88%  ±9.17% ±11.95%
                                                                                              confidence improvement accuracy (*)   (**)   (***)
                                                                                                      NA       NaN %           NA     NA      NA
http/check_invalid_header_char.js n=1000000 input=''                                                         -0.43 %       ±6.31% ±8.40% ±10.93%
http/check_invalid_header_char.js n=1000000 input='1'                                                         1.42 %       ±4.90% ±6.52%  ±8.49%
http/check_invalid_header_char.js n=1000000 input='20091'                                                     2.33 %       ±4.36% ±5.81%  ±7.57%
http/check_invalid_header_char.js n=1000000 input='close'                                                     0.20 %       ±4.35% ±5.79%  ±7.54%
http/check_invalid_header_char.js n=1000000 input='en-US'                                                     0.27 %       ±3.14% ±4.17%  ±5.43%
http/check_invalid_header_char.js n=1000000 input='foo\\nbar'                                                -4.35 %       ±5.03% ±6.71%  ±8.76%
http/check_invalid_header_char.js n=1000000 input='group_acmeair'                                            -2.05 %       ±3.49% ±4.65%  ±6.06%
http/check_invalid_header_char.js n=1000000 input='gzip'                                                      0.23 %       ±4.54% ±6.04%  ±7.86%
http/check_invalid_header_char.js n=1000000 input='keep-alive'                                               -1.70 %       ±4.36% ±5.80%  ±7.55%
http/check_invalid_header_char.js n=1000000 input='LONG_AND_INVALID'                                         -0.43 %       ±2.02% ±2.68%  ±3.49%
http/check_invalid_header_char.js n=1000000 input='private'                                                   1.65 %       ±4.70% ±6.27%  ±8.20%
http/check_invalid_header_char.js n=1000000 input='SAMEORIGIN'                                                2.27 %       ±4.58% ±6.11%  ±7.96%
http/check_invalid_header_char.js n=1000000 input='Sat, 07 May 2016 16:54:48 GMT'                             1.14 %       ±3.96% ±5.28%  ±6.87%
http/check_invalid_header_char.js n=1000000 input='text/html; charset=utf-8'                                 -1.90 %       ±4.41% ±5.88%  ±7.65%
http/check_invalid_header_char.js n=1000000 input='text/plain'                                                0.33 %       ±4.28% ±5.70%  ±7.44%
http/check_invalid_header_char.js n=1000000 input='\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tFoo bar baz'                -0.80 %       ±3.32% ±4.42%  ±5.77%
http/check_invalid_header_char.js n=1000000 input='\\x7F'                                                     0.55 %       ±4.73% ±6.30%  ±8.20%
http/check_invalid_header_char.js n=1000000 input='中文呢'                                                   -0.24 %       ±4.16% ±5.53%  ±7.21%
http/headers.js duration=5 len=100 n=10 benchmarker='wrk'                                                     1.35 %       ±3.45% ±4.59%  ±5.98%
http/headers.js duration=5 len=100 n=600 benchmarker='wrk'                                                   -0.24 %       ±4.83% ±6.43%  ±8.38%
http/headers.js duration=5 len=1 n=10 benchmarker='wrk'                                                      -1.59 %       ±5.20% ±6.91%  ±9.00%
http/headers.js duration=5 len=1 n=600 benchmarker='wrk'                                                      0.00 %       ±3.23% ±4.31%  ±5.62%
http/incoming_headers.js duration=5 w=0 headers=20 connections=50 benchmarker='wrk'                           4.71 %       ±4.90% ±6.52%  ±8.49%
http/incoming_headers.js duration=5 w=6 headers=20 connections=50 benchmarker='wrk'                          -1.63 %       ±4.99% ±6.65%  ±8.67%
http/set-header.js duration=5 res='normal' benchmarker='wrk'                                                 -1.62 %       ±4.20% ±5.59%  ±7.28%
http/set-header.js duration=5 res='setHeader' benchmarker='wrk'                                              -2.73 %       ±3.81% ±5.07%  ±6.59%
http/set-header.js duration=5 res='setHeaderWH' benchmarker='wrk'                                             1.61 %       ±4.58% ±6.09%  ±7.93%
http/set_header.js n=1000000 value='Connection'                                                               0.83 %       ±2.04% ±2.72%  ±3.54%
http/set_header.js n=1000000 value='Content-Length'                                                           0.71 %       ±2.23% ±2.99%  ±3.92%
http/set_header.js n=1000000 value='Content-Type'                                                            -0.42 %       ±1.78% ±2.37%  ±3.09%
http/set_header.js n=1000000 value='Set-Cookie'                                                               0.39 %       ±1.76% ±2.34%  ±3.05%
http/set_header.js n=1000000 value='Transfer-Encoding'                                                        1.97 %       ±3.40% ±4.57%  ±6.05%
http/set_header.js n=1000000 value='Vary'                                                                     1.49 %       ±1.95% ±2.59%  ±3.37%
http/set_header.js n=1000000 value='X-Powered-By'                                                             1.21 %       ±1.82% ±2.42%  ±3.15%
                       confidence improvement accuracy (*)   (**)   (***)
http/upgrade.js n=1000                 2.07 %       ±5.89% ±7.84% ±10.21%
http/upgrade.js n=5                   -0.38 %       ±5.23% ±6.96%  ±9.05%
                                                                                              confidence improvement accuracy (*)   (**)   (***)
http/check_invalid_header_char.js n=1000000 input=''                                                         -3.32 %       ±3.63% ±4.83%  ±6.28%
http/check_invalid_header_char.js n=1000000 input='1'                                                         0.12 %       ±3.58% ±4.76%  ±6.20%
http/check_invalid_header_char.js n=1000000 input='20091'                                                     1.52 %       ±5.04% ±6.70%  ±8.73%
http/check_invalid_header_char.js n=1000000 input='close'                                                     1.90 %       ±4.51% ±6.01%  ±7.84%
http/check_invalid_header_char.js n=1000000 input='en-US'                                                    -1.46 %       ±3.23% ±4.30%  ±5.59%
http/check_invalid_header_char.js n=1000000 input='foo\\nbar'                                                -3.71 %       ±4.28% ±5.70%  ±7.43%
http/check_invalid_header_char.js n=1000000 input='group_acmeair'                                      *     -3.12 %       ±3.06% ±4.09%  ±5.34%
http/check_invalid_header_char.js n=1000000 input='gzip'                                                     -2.64 %       ±5.31% ±7.07%  ±9.22%
http/check_invalid_header_char.js n=1000000 input='keep-alive'                                                0.61 %       ±5.27% ±7.01%  ±9.13%
http/check_invalid_header_char.js n=1000000 input='LONG_AND_INVALID'                                          0.18 %       ±2.27% ±3.02%  ±3.94%
http/check_invalid_header_char.js n=1000000 input='private'                                                   0.41 %       ±2.83% ±3.77%  ±4.91%
http/check_invalid_header_char.js n=1000000 input='SAMEORIGIN'                                               -1.72 %       ±3.89% ±5.17%  ±6.74%
http/check_invalid_header_char.js n=1000000 input='Sat, 07 May 2016 16:54:48 GMT'                             0.01 %       ±2.57% ±3.42%  ±4.46%
http/check_invalid_header_char.js n=1000000 input='text/html; charset=utf-8'                                  0.90 %       ±6.15% ±8.19% ±10.66%
http/check_invalid_header_char.js n=1000000 input='text/plain'                                                3.01 %       ±3.83% ±5.10%  ±6.66%
http/check_invalid_header_char.js n=1000000 input='\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tFoo bar baz'                -0.11 %       ±3.64% ±4.86%  ±6.36%
http/check_invalid_header_char.js n=1000000 input='\\x7F'                                                    -3.55 %       ±5.40% ±7.19%  ±9.36%
http/check_invalid_header_char.js n=1000000 input='中文呢'                                                    1.29 %       ±3.80% ±5.06%  ±6.59%
http/check_is_http_token.js n=1000000 key=':'                                                                -0.63 %       ±5.20% ±6.92%  ±9.01%
http/check_is_http_token.js n=1000000 key='((((())))'                                                  *      5.60 %       ±4.53% ±6.04%  ±7.87%
http/check_is_http_token.js n=1000000 key='@@'                                                                3.92 %       ±6.07% ±8.09% ±10.54%
http/check_is_http_token.js n=1000000 key='Accept-Ranges'                                                     0.97 %       ±3.76% ±5.01%  ±6.55%
http/check_is_http_token.js n=1000000 key=':alternate-protocol'                                               0.22 %       ±5.58% ±7.42%  ±9.65%
http/check_is_http_token.js n=1000000 key='alternate-protocol:'                                        *      3.57 %       ±3.28% ±4.37%  ±5.69%
http/check_is_http_token.js n=1000000 key='alternate-protocol'                                               -2.00 %       ±3.20% ±4.26%  ±5.56%
http/check_is_http_token.js n=1000000 key='alt-svc'                                                           2.40 %       ±3.75% ±4.99%  ±6.49%
http/check_is_http_token.js n=1000000 key='Cache-Control'                                                     1.64 %       ±4.13% ±5.50%  ±7.16%
http/check_is_http_token.js n=1000000 key='Connection'                                                       -2.00 %       ±4.67% ±6.22%  ±8.10%
http/check_is_http_token.js n=1000000 key='Content-Encoding'                                                 -2.40 %       ±4.07% ±5.42%  ±7.05%
http/check_is_http_token.js n=1000000 key='content-length'                                                    2.92 %       ±4.29% ±5.73%  ±7.48%
http/check_is_http_token.js n=1000000 key='Content-Location'                                                  2.00 %       ±3.92% ±5.21%  ±6.78%
http/check_is_http_token.js n=1000000 key='content-type'                                                     -0.14 %       ±3.99% ±5.31%  ±6.91%
http/check_is_http_token.js n=1000000 key='Content-Type'                                                      3.03 %       ±3.84% ±5.11%  ±6.65%
http/check_is_http_token.js n=1000000 key='date'                                                              1.07 %       ±3.70% ±4.92%  ±6.40%
http/check_is_http_token.js n=1000000 key='ETag'                                                             -1.31 %       ±4.70% ±6.26%  ±8.15%
http/check_is_http_token.js n=1000000 key='Expires'                                                          -2.46 %       ±6.07% ±8.11% ±10.63%
http/check_is_http_token.js n=1000000 key='Keep-Alive'                                                       -2.78 %       ±4.37% ±5.83%  ±7.62%
http/check_is_http_token.js n=1000000 key='Last-Modified'                                                     1.36 %       ±3.93% ±5.24%  ±6.82%
http/check_is_http_token.js n=1000000 key='location'                                                          2.02 %       ±3.01% ±4.00%  ±5.21%
http/check_is_http_token.js n=1000000 key='server'                                                            0.26 %       ±3.72% ±4.97%  ±6.50%
http/check_is_http_token.js n=1000000 key='Server'                                                            0.81 %       ±4.03% ±5.37%  ±7.00%
http/check_is_http_token.js n=1000000 key='status'                                                           -0.18 %       ±5.12% ±6.83%  ±8.91%
http/check_is_http_token.js n=1000000 key='TCN'                                                              -0.70 %       ±4.10% ±5.46%  ±7.11%
http/check_is_http_token.js n=1000000 key='Transfer-Encoding'                                                -0.06 %       ±4.74% ±6.31%  ±8.21%
http/check_is_http_token.js n=1000000 key='Vary'                                                             -2.94 %       ±4.37% ±5.81%  ±7.57%
http/check_is_http_token.js n=1000000 key='version'                                                          -1.39 %       ±4.36% ±5.81%  ±7.56%
http/check_is_http_token.js n=1000000 key='x-frame-options'                                                   3.44 %       ±4.60% ±6.14%  ±8.02%
http/check_is_http_token.js n=1000000 key='x-xss-protection'                                                 -0.28 %       ±4.10% ±5.45%  ±7.10%
http/check_is_http_token.js n=1000000 key='中文呢'                                                            1.51 %       ±4.26% ±5.67%  ±7.38%
                                                                                                  confidence improvement accuracy (*)    (**)   (***)
http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='asc' benchmarker='wrk'                  -0.48 %       ±2.77%  ±3.69%  ±4.80%
http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='buf' benchmarker='wrk'                   0.35 %       ±7.27%  ±9.68% ±12.61%
http/end-vs-write-end.js duration=5 method='end' c=100 len=1048576 type='utf' benchmarker='wrk'                  -1.16 %       ±2.05%  ±2.73%  ±3.55%
http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='asc' benchmarker='wrk'                   -1.43 %       ±1.95%  ±2.60%  ±3.39%
http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='buf' benchmarker='wrk'                   -0.57 %       ±3.76%  ±5.00%  ±6.51%
http/end-vs-write-end.js duration=5 method='end' c=100 len=131072 type='utf' benchmarker='wrk'                    2.05 %       ±2.14%  ±2.86%  ±3.77%
http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='asc' benchmarker='wrk'                   -2.15 %       ±2.56%  ±3.42%  ±4.47%
http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='buf' benchmarker='wrk'                   -2.64 %       ±5.75%  ±7.65%  ±9.95%
http/end-vs-write-end.js duration=5 method='end' c=100 len=262144 type='utf' benchmarker='wrk'                    0.49 %       ±3.59%  ±4.78%  ±6.23%
http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='asc' benchmarker='wrk'                    -0.07 %       ±1.93%  ±2.57%  ±3.35%
http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='buf' benchmarker='wrk'                     2.08 %       ±3.02%  ±4.03%  ±5.24%
http/end-vs-write-end.js duration=5 method='end' c=100 len=65536 type='utf' benchmarker='wrk'                    -2.18 %       ±3.61%  ±4.80%  ±6.24%
http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='asc' benchmarker='wrk'                -3.50 %       ±5.46%  ±7.26%  ±9.45%
http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='buf' benchmarker='wrk'                 0.55 %       ±7.65% ±10.18% ±13.25%
http/end-vs-write-end.js duration=5 method='write' c=100 len=1048576 type='utf' benchmarker='wrk'                 3.14 %       ±4.86%  ±6.47%  ±8.42%
http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='asc' benchmarker='wrk'                 -2.09 %       ±5.47%  ±7.28%  ±9.49%
http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='buf' benchmarker='wrk'                 -1.96 %       ±3.29%  ±4.38%  ±5.70%
http/end-vs-write-end.js duration=5 method='write' c=100 len=131072 type='utf' benchmarker='wrk'                 -1.37 %       ±5.23%  ±6.97%  ±9.09%
http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='asc' benchmarker='wrk'                 -5.75 %       ±5.98%  ±7.95% ±10.35%
http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='buf' benchmarker='wrk'                 -1.76 %       ±5.48%  ±7.29%  ±9.48%
http/end-vs-write-end.js duration=5 method='write' c=100 len=262144 type='utf' benchmarker='wrk'                 -1.00 %       ±5.19%  ±6.90%  ±8.99%
http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='asc' benchmarker='wrk'                   1.56 %       ±5.34%  ±7.11%  ±9.25%
http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='buf' benchmarker='wrk'                  -1.84 %       ±2.94%  ±3.91%  ±5.09%
http/end-vs-write-end.js duration=5 method='write' c=100 len=65536 type='utf' benchmarker='wrk'                   1.17 %       ±4.85%  ±6.46%  ±8.41%

[aduh95]

Benchmark results look OK.

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38227/

[mcollina]

I would like to do some checks of my own before landing.

[mcollina]

Temporary -1 until I can test this as well.

[mcollina]

lgtm on my end

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/38241/ 💚

[jasnell]

Landed in 13ec317

[richardlau]

I'm going to mark this (and any other "use primordials" I come across) as requiring a manual backport due to the recent discussions around use of primordials in current and the fact that v14.x has an older version of V8 so if we did land these we would probably want to check benchmarks.