Hacker News Reader

I don't like Javascript but you're mistaken on the performance part, even I have to give the JIT people props for how fast they've made the language in general.

View on HN

It is not about the interpreter. You just can't express performant code in these languages.

JIT compilation makes Javascript faster, but it is not by any metric "fast".

Depending on specific use-case, today's JavaScript code is only 2–7 times slower than corresponding C++. That's pretty damn fast. Faster than some compiled languages. Fast enough that if you wanted to obsess over performance you can build the fastest backend framework in Node.js[0][1]

[0] https://www.techempower.com/benchmarks/#section=data-r21&tes...

[1] https://just.billywhizz.io/blog/on-javascript-performance-01...

Hmm...2-7x slower is slow, and that's almost certainly after warmup.

Just to put it in perspective: the new Team's startup time is ~9 seconds. At 7x faster, it would be slightly above 1 second, which would be OK.

Reply on news.ycombinator.com