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A comment on Rolldown: Rollup compatible bundler written in Rust. Parent comment

Re:Rolldown: Rollup compatible bundler written in Rust by 0x457 on Friday March 08, 2024 @12:13PM (#39643201)
Things in JS (node.js) are fast when:

a) It's actually calling some native code internally (i.e. rust, c/c++ or V8 internals)

b) JIT'ed

Path "b" is very hard to achieve in CLI tool

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Re:Rolldown: Rollup compatible bundler written in Rust by robocat on Friday March 08, 2024 @01:32PM (#39644292)
> Path "b" is very hard to achieve in CLI tool

Why say that?

Yes, perhaps if the CLI tool is being invoked many many times in succession.

But otherwise JITing isn't an issue: either (a) your program runs quickly in which case the Ignition interpreter is used and the JIT is not used, or (b) your program runs slowly in which case JIT (Sparkplug/Maglev/Turbofan) has time to warm up.

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Re:Rolldown: Rollup compatible bundler written in Rust by 0x457 on Monday March 11, 2024 @07:35PM (#39674429)
> Yes, perhaps if the CLI tool is being invoked many many times in succession.

Each execution will be a fresh VM though. A CLI tool isn't a long-running daemon. There is also the whole lack of parallelism without forking in this ecosystem.

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