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Michael Achenbach authored
This reverts commit d5457f5f. Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20gc%20stress/32999 Original change's description: > [api] JSFunction PromiseHook for v8::Context > > This will enable Node.js to get much better performance from async_hooks > as currently PromiseHook delegates to C++ for the hook function and then > Node.js delegates it right back to JavaScript, introducing several > unnecessary barrier hops in code that gets called very, very frequently > in modern, promise-heavy applications. > > This API mirrors the form of the original C++ function based PromiseHook > API, however it is intentionally separate to allow it to use JSFunctions > triggered within generated code to, as much as possible, avoid entering > runtime functions entirely. > > Because PromiseHook has internal use also, beyond just the Node.js use, > I have opted to leave the existing API intact and keep this separate to > avoid conflicting with any possible behaviour expectations of other API > users. > > The design ideas for this new API stemmed from discussion with some V8 > team members at a previous Node.js Diagnostics Summit hosted by Google > in Munich, and the relevant documentation of the discussion can be found > here: https://docs.google.com/document/d/1g8OrG5lMIUhRn1zbkutgY83MiTSMx-0NHDs8Bf-nXxM/edit#heading=h.w1bavzz80l1e > > A summary of the reasons for why this new design is important can be > found here: https://docs.google.com/document/d/1vtgoT4_kjgOr-Bl605HR2T6_SC-C8uWzYaOPDK5pmRo/edit?usp=sharing > > Bug: v8:11025 > Change-Id: I0b403b00c37d3020b5af07b654b860659d3a7697 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2759188 > Reviewed-by: Marja Hölttä <marja@chromium.org> > Reviewed-by: Camillo Bruni <cbruni@chromium.org> > Reviewed-by: Anton Bikineev <bikineev@chromium.org> > Reviewed-by: Igor Sheludko <ishell@chromium.org> > Commit-Queue: Camillo Bruni <cbruni@chromium.org> > Cr-Commit-Position: refs/heads/master@{#73858} Bug: v8:11025 Change-Id: Ie7345c4505f39c973f9f0dbca745b591cff63f3f No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2814740 Auto-Submit: Michael Achenbach <machenbach@chromium.org> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Cr-Commit-Position: refs/heads/master@{#73862}
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