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benchmark: benchmarking impacts of async hooks on promises #31188

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benchmark: benchmarking impacts of async hooks on promises #31188

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legendecas
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@legendecas legendecas commented Jan 5, 2020 •
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Refs: nodejs/diagnostics#124

FWIW, following is the result of the benchmark:

async_hooks/promises.js asyncHooks="enabled" n=1000000: 143,333.79312043046
async_hooks/promises.js asyncHooks="disabled" n=1000000: 394,449.2637313192
Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • commit message follows commit guidelines

@legendecas legendecas added the async_hooks Issues and PRs related to the async hooks subsystem. label Jan 5, 2020
@nodejs-github-bot nodejs-github-bot added the benchmark Issues and PRs related to the benchmark subsystem. label Jan 5, 2020
addaleax
addaleax approved these changes Jan 5, 2020
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benchmark/async_hooks/promises.js Outdated
run(n).then(() => {
bench.end(n);
});
break;
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You could fall through here after the hook.enable() call, if you like.

lundibundi
lundibundi approved these changes Jan 5, 2020
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benchmark/async_hooks/promises.js Outdated Show resolved Hide resolved
benchmark/async_hooks/promises.js Outdated
Comment on lines 14 to 16
await new Promise((resolve) => resolve())
.then(() => { throw new Error('foobar'); })
.catch((e) => e);
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Nit:

    await Promise.resolve()
      .then(() => { throw new Error('foobar'); })
      .catch((e) => e);

Trott
Trott reviewed Jan 6, 2020
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benchmark/async_hooks/promises.js Outdated

const bench = common.createBenchmark(main, {
n: [1e6],
method: [
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Nit: These aren't methods. They're descriptive strings, right? I don't have a better idea than method though, so maybe it's fine and if someone comes up with something better in the future, they can PR that in.

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What about:

tracking: [
  'enabled',
  'disabled'
]

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(If we do make this change, which I like, we'll need to add tracking to test-benchmark-async-hooks.js.)

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Trott commented Jan 6, 2020

Confirmed on the command line that test/benchmark/test-benchmark-async-hooks.js still works.

Trott
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Optional nit or something for someone to do in a subsequent PR: It might be a good idea to have a default value for method (like we do for cipher in benchmark/crypto/aes-gcm-throughput.js) and then specify an empty string for method in test/benchmark/test-benchmark-async-hooks.js. Then subsequent benchmarks that want to use method don't have to use trackingDisabled or whatever if that's not appropriate for that benchmark.

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CI: https://ci.nodejs.org/job/node-test-pull-request/28234/

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CI: https://ci.nodejs.org/job/node-test-pull-request/28241/

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Trott commented Jan 7, 2020

Benchmark tests CI: https://ci.nodejs.org/job/node-test-commit-custom-suites-freestyle/11413/

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CI: https://ci.nodejs.org/job/node-test-pull-request/28270/

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CI: https://ci.nodejs.org/job/node-test-pull-request/28291/

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Trott commented Jan 8, 2020

Landed in b3b0ae5

@Trott Trott closed this Jan 8, 2020
Trott pushed a commit that referenced this pull request Jan 8, 2020
@legendecas @Trott
benchmark: benchmarking impacts of async hooks on promises
b3b0ae5 
PR-URL: #31188
Refs: nodejs/diagnostics#124
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
@legendecas legendecas deleted the benchmark-async-hooks-promises branch January 8, 2020 23:30
MylesBorins pushed a commit that referenced this pull request Jan 16, 2020
@legendecas @MylesBorins
benchmark: benchmarking impacts of async hooks on promises
317d2db 
PR-URL: #31188
Refs: nodejs/diagnostics#124
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
@codebytere codebytere mentioned this pull request Jan 16, 2020
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codebytere pushed a commit that referenced this pull request Mar 14, 2020
@legendecas @codebytere
benchmark: benchmarking impacts of async hooks on promises
4f9d57d 
PR-URL: #31188
Refs: nodejs/diagnostics#124
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
@codebytere codebytere mentioned this pull request Mar 17, 2020
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@puzpuzpuz
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Is there an issue for continuation of this work (I mean further optimization)?

I did a simple experiment recently. I have removed emit resolve call from PromiseWrap, so that C++ to JS calls (at least, for resolve hook) don't happen in this benchmark. It did almost no impact on the benchmark result: increase for the async_hooks enabled scenario was around 10-15%. This makes me thinking that C++ to JS calls are less expensive than PromiseWrap itself, at least in this benchmark.

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@puzpuzpuz Yeah, your result is quite similar in my local reproduction. I'm trying to find out improvements. But, alas, if you have any idea you can go ahead 😄.

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@puzpuzpuz Yeah, your result is quite similar in my local reproduction. I'm trying to find out improvements. But, alas, if you have any idea you can go ahead .

I was thinking of optimizations for AsyncLocalStorage scenario, i.e. when only init hook is present. Maybe, some corners can be cut in this case, but I don't have anything specific on my mind yet. Going to do some more experiments to gather ideas.

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@lundibundi lundibundi lundibundi approved these changes

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