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Comment by ivankra

6 hours ago

> Although it will be a lot slower, I’m not clear just how slow.

Around 30-50x slower than V8 (node/deno).

I've been recently benchmarking a lot of different engines: https://ivankra.github.io/javascript-zoo/

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ivankra

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ranger_danger  6 hours ago

> Around 30-50x slower than V8 (node/deno).

A solver running at 50ms instead of 1ms I would say is practically imperceptible to most users, but I don't know what time span you are measuring with those numbers.

  • ivankra  5 hours ago

    My page is about generic JS benchmarks. Just did a quick run with a sample javascript challenge I got via yt-dlp (https://raw.githubusercontent.com/ivankra/javascript-zoo/ref...):

      $ time ./v8 /bench/yt-dlp.js | md5sum -
  a730e32029941bf1f60f9587a6d9554f  -
  real 0m0.252s
  user 0m0.386s
  sys 0m0.074s

  $ time ./quickjs /bench/yt-dlp.js | md5sum -
  a730e32029941bf1f60f9587a6d9554f  -
  real 0m2.280s
  user 0m2.507s
  sys 0m0.031s

    So about 10x slower for the current flavor of YouTube challenges: 0.2s -> 2.2s.

    A few more results on same input:

      spidermonkey 0.334s
  v8_jitless 1.096s => about the limit for JIT-less interpreters like quickjs
  graaljs 2.396s
  escargot 3.344s
  libjs 4.501s
  brimstone 6.328s
  modernc-quickjs 12.767s (pure Go port of quickjs)
  fastschema-qjs 1m22.801s (Wasm port of quickjs)
  boa 1m28.070s
  quickjs-ng 2m49.202s

    • rdtsc  4 hours ago

      Thanks for the benchmark!

      I tried it on my slower laptop. I get:

         node(v8)  : 1.25s user 0.12s system 154% cpu 0.892 total
   quickjs   : 6.54s user 0.11s system 99% cpu 6.671 total
   quickjs-ng: 545.55s user 202.67s system 99% cpu 12:32.28 total

      A 5x slowdown for an interpreted C JS engine is pretty good I think, compared to all the time, code and effort put into v8 over the years!