Comment by IggleSniggle
4 years ago
I live in js land, and the barrier between “folklore” and “documentation” is extremely thin. Especially since V8 may introduce changes at any time that affect performance characteristics of js.
I’d respond with “well if performance matters it shouldn’t be in js” except for all the shite being written in js these days, with js being the hammer that makes everything else look like a nail.
V8 documents these changes very well[1].
You can write very fast JS code. When carefully written it can have Java like performance[2]. It is just very hard in practice where most ecosystem is optimized for developer productivity.
When performance matter, write your own code and carefully benchmark everything. You can see this working for Typescript and VSCode[3]
[1] https://v8.dev/blog [2] https://benchmarksgame-team.pages.debian.net/benchmarksgame/... [3] https://github.com/microsoft/TypeScript/pull/43035#issuecomm...
My understanding is that when written carefully, it can have Go-like performance.