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V8 Fast API Calls #38664

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@TimothyGu

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?

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