child_process: fix IPC 'message' event regression #13856
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mcollina
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lib/internal/child_process.js
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| } | ||
| process.nextTick(() => { | ||
| target.emit(eventName, message, handle); | ||
| }); |
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can you restore the use of the emit() function to avoid allocating this closure?
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@mcollina updated to only remove the |
mcollina
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Jun 22, 2017
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Benchmark results from my machine: Looks like only a fraction of the gains from #13459 were lost. |
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Thanks Colin. Still LGTM. |
santigimeno
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Jun 23, 2017
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Confirm test fails on my machine as well (Windows). |
This commit fixes a regression related to IPC 'message' events. When messages are not emitted in the next tick, a 'message' handler that throws can break the IPC read loop. Refs: nodejs#6909 Refs: nodejs#13459 Refs: nodejs#13648 PR-URL: nodejs#13856 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
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The benchmark results from the original PR would be these since the PR was originally started before the V8 5.9 merge, so this revert has a larger impact actually. Probably the only thing that makes it have a little less of an impact is the |
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This commit fixes a regression related to IPC 'message' events. When messages are not emitted in the next tick, a 'message' handler that throws can break the IPC read loop. Refs: #6909 Refs: #13459 Refs: #13648 PR-URL: #13856 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
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This commit fixes a regression related to IPC 'message' events. When messages are not emitted in the next tick, a 'message' handler that throws can break the IPC read loop. Refs: #6909 Refs: #13459 Refs: #13648 PR-URL: #13856 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
addaleax
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This commit fixes a regression related to IPC 'message' events. When messages are not emitted in the next tick, a 'message' handler that throws can break the IPC read loop. Refs: #6909 Refs: #13459 Refs: #13648 PR-URL: #13856 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
MylesBorins
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I've thrown a baking label on this... we should likely land if we backport other change |
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This PR reverts 8208fda from #13459. When IPC messages are not emitted in the next tick, a
'message'handler that throws can break the IPC read loop. This was originally fixed in #6909.The second commit in this PR adds a regression test that fails with 8208fda, but passes with the revert (at least on my machine).
Note: I believe this can be fixed without a full revert of 8208fda, but wanted to use that as a starting point for this PR.
Refs: #6909
Refs: #13459
Refs: #13648
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passesAffected core subsystem(s)
child_process, test