Reduce V8 size by eliminating unused features

[Tekman]

Hi,

Do you have any tips for reducing the size of an embedded V8 by removing unnecessary functionality (such as wasm or worker support)? Size on disk comes to mind since I presume runtime cost is already pay-for-play.

We're looking for a basic ES6 runtime environment that is compact and efficient (with JIT support), without any of the bells & whistles.

Thank you!

[Ben Noordhuis]

Take a look at BUILD.gn, V8 has a veritable zoo of build options. The
two quickest wins are probably v8_enable_lite_mode=true and
v8_enable_i18n_support=false (drops the dependency on ICU, which is
_big_.)

[Jakob Gruber]

+Clemens Backes I know we'd discussed a flag to make wasm optional in the past, was there any progress?

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[Clemens Backes]

Yep, the work to optionally strip out wasm is tracked in https://crbug.com/v8/11238. We have the gn arg now, but it does not reduce binary size yet. This will probably change until the end of this quarter. Follow the bug to get updates!

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Clemens Backes

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