JavaScript Engine Performance

Comments focus on comparing the speed, benchmarks, and optimizations of JavaScript engines across browsers like V8 (Chrome), SpiderMonkey (Firefox), and JSC (Safari), frequently referencing sites like arewefastyet.com.

➡️ Stable 0.5x Web Development
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Keywords

FF CPU JIT JS L207 TM V8 FF4 JM IE9 javascript js v8 benchmark chrome safari engines performance engine asm js

Sample Comments

saagarjha Nov 29, 2020 View on HN

I wonder how performance compares to other JavaScript engines.

viraptor Mar 7, 2019 View on HN

At least in JS scenarios, the difference is nowhere near that. It's actually trading the first place with chrome between tests: https://arewefastyet.com/

alexgartrell Jul 20, 2009 View on HN

As a CPU contributor, I demand that you give us stats as to which browsers were the fastest for your computation! This could be an interesting comparison point for the bundled javascript engines. (Maybe :))

metamemetics Apr 24, 2010 View on HN

outdated benchmark. Opera javascript is substantially faster now

Jonanin Oct 28, 2014 View on HN

Check out http://arewefastyet.com/ (the website mentioned in the article), which tracks javascript engine performance. Spidermonkey is faster than v8 and Safari's JSC on all three popular javascript benchmarks [1][1] Octane (google's benchmark), Sunspider (Apple/Webkit's benchmark), and Kraken (Mozilla's benchmark).

ynd Feb 16, 2012 View on HN

It runs much faster with Chrome and Safari due to their better Javascript VM.

riobard Nov 28, 2013 View on HN

It would be nice to have some rough performance numbers to compare with existing JS engines.

chadcmulligan Jun 13, 2023 View on HN

Javascript is jit? so it would be fair to compare the jit versions.

iberator Dec 16, 2025 View on HN

Why do you need THAT fast js for? Firefox is amazing speed even if second in the benchmarks.

Zekio Apr 20, 2018 View on HN

For me faster.js was faster for 2 seconds then it became slower and slower in Firefox