V8 Fast API Calls #38664

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?