Explicit compile hints control which JavaScript files and functions are parsed and compiled eagerly

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Explicit Compile Hints in V8 improve JavaScript startup speed by allowing web developers to control which functions are compiled eagerly. This approach reduces duplicate parsing and compilation time during page loading, optimizing web app responsiveness. A recent feature in Chrome 136 allows developers to specify entire files for eager compilation using a special comment. However, it should be used judiciously to avoid excessive time and memory consumption.

Giving V8 a Heads-Up: Faster JavaScript Startup with Explicit Compile Hints · V8

See for yourself - compile hints in action #