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cesarvarela 4 hours ago

I've found it to be at least twice as fast with practically no compat issues.

smarnach 3 hours ago | parent [-]

Twice as fast at executing JavaScript? There's absolutely zero chance this is true. A JavaScript engine that's twice as fast as V8 in general doesn't exist. There may be 5 or 10 percent difference, but nothing really meaningful.

johnfn 2 hours ago | parent | next [-]

You might want to revise what you consider to be "absolutely zero chance". Bun has an insanely fast startup time, so it definitely can be true for small workloads. A classic example of this was on Bun's website for a while[1] - it was "Running 266 React SSR tests faster than Jest can print its version number".

[1]: https://x.com/jarredsumner/status/1542824445810642946

jasnell an hour ago | parent | prev | next [-]

Keep in mind that it's not just a matter of comparing the JS engine. The runtime that is built around the engine can have a far greater impact on performance than the choice of v8 vs. JSC vs. anything else. In many microbenchmarks, Bun routinely outperforms Node.js and Deno in most tasks by a wide margin.

ukblewis 2 hours ago | parent | prev | next [-]

It depends on what. Bun has some major optimisations. You’ll have to read into them if you don’t believe me. The graphs don’t come from nowhere

2 hours ago | parent | prev [-]
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