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V8 Fast API Calls #38664

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TimothyGu opened this issue May 13, 2021 · 1 comment
Closed

V8 Fast API Calls #38664

TimothyGu opened this issue May 13, 2021 · 1 comment
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c++ Issues and PRs that require attention from people who are familiar with C++. v8 module Issues and PRs related to the "v8" subsystem.

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@TimothyGu
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V8 recently introduced support for fast JITed native function calls: BlinkOn talk / deps/v8/include/v8-fast-api-calls.h. There are some restrictions on what it can be used with, including

  • Must not trigger a GC event ⇒
    • No allocation on the managed heap
    • No calling back into Javascript
    • Guarded by CHECKs
  • No allocation means Blink cannot throw exceptions, log to the console, etc. These operations can be supported by recording the intent to execute them in a deferred manner.

but we may be able to find use cases for it?
@TimothyGu TimothyGu added c++ Issues and PRs that require attention from people who are familiar with C++. v8 module Issues and PRs related to the "v8" subsystem. labels May 13, 2021
@TimothyGu
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I notice that this was already used in #33600, so not so new anymore ☺

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