vm: lazily initialize primordials for vm contexts #31738
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Lazily initialize primordials when cross-context support for builtins is needed to fix the performance regression in context creation.
nodejs-github-bot
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joyeecheung
commented
Feb 11, 2020
| return InitializePrimordials(context); | ||
| } | ||
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| bool InitializePrimordials(Local<Context> context) { |
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This block contains only indentation change
joyeecheung
commented
Feb 11, 2020
src/api/environment.cc
Outdated
| @@ -407,6 +407,7 @@ MaybeLocal<Object> GetPerContextExports(Local<Context> context) { | |||
| Local<Object> exports = Object::New(isolate); | |||
| if (context->Global()->SetPrivate(context, key, exports).IsNothing()) | |||
| return MaybeLocal<Object>(); | |||
| InitializePrimordials(context); | |||
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This is only hit for vm contexts and main contexts created without snapshot support so there's no additional cost for the main context built with snapshot support
devsnek
approved these changes
Feb 11, 2020
joyeecheung
commented
Feb 11, 2020
| @@ -405,7 +405,8 @@ MaybeLocal<Object> GetPerContextExports(Local<Context> context) { | |||
| return handle_scope.Escape(existing_value.As<Object>()); | |||
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| Local<Object> exports = Object::New(isolate); | |||
| if (context->Global()->SetPrivate(context, key, exports).IsNothing()) | |||
| if (context->Global()->SetPrivate(context, key, exports).IsNothing() || | |||
| !InitializePrimordials(context)) | |||
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Oops, forgot to handle the return value of InitializePrimordials in the initial commit, fixed.
addaleax
approved these changes
Feb 11, 2020
devnexen
approved these changes
Feb 12, 2020
🙂 |
addaleax
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Landed in e6c2277. Thanks! |
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@joyeecheung if this should go to |
targos
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Apr 25, 2020
Lazily initialize primordials when cross-context support for builtins is needed to fix the performance regression in context creation. PR-URL: nodejs#31738 Fixes: nodejs#29842 Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: David Carlier <devnexen@gmail.com>
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Lazily initialize primordials when cross-context support for
builtins is needed to fix the performance regression in context
creation.
Fixes: #29842
local benchmark results
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes