• Michael Achenbach's avatar
    Revert "[api] JSFunction PromiseHook for v8::Context" · 4a17cc7c
    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}
    4a17cc7c
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