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Explicit Compile Hints with Magic Comments

Category

JavaScript

Type

New or changed feature

Status

Origin trial (Chrome Origin trial)

Intent stage

None

Summary

Allow attaching information about which functions should be eager parsed & compiled in JavaScript files. The information will be encoded as magic comments. We'll first target launching the file-based explicit compile hints, and as a follow up, investigate selecting individual functions for eager compilation.

Standards & signals

• Specification: https://wicg.github.io/explicit-javascript-compile-hints-file-based
• Firefox: N/A
• Safari: N/A
• Web developers: Positive — Positive signals from partners who want to use compile hints to eager-compile core JS files.
• Tracking bug: https://bugs.chromium.org/p/v8/issues/detail?id=13917

Explainers: https://github.com/WICG/explicit-javascript-compile-hints-file-based

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