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JavaScript engines zoo – Compare every JavaScript engine
11–20 of 97 posts
Re: JavaScript engines zoo – Compare every JavaScript engine
#12This is super cool, I didn't know JavaScriptCore consistently outperformed V8 And SpiderMonkey seems... not up there compared to the other 2
Interesting how V8 to JSC ~2x LOC but ~2/3 the binary size.
The size difference is so large it makes me wonder if one is being compiled with ICU and the other without.
Re: JavaScript engines zoo – Compare every JavaScript engine
#13This is super cool, I didn't know JavaScriptCore consistently outperformed V8 And SpiderMonkey seems... not up there compared to the other 2
That’s the promise of Bun - that it is faster because it uses JavascriptCore.
Re: JavaScript engines zoo – Compare every JavaScript engine
#14You can see when JIT is disabled, the upcoming Static Hermes (Hermes V1) engine from Meta, built specifically for React Native, outperforms both V8 and JSCore on Apple Silicon
It'll be interesting to see how much it will affect React Native apps as it gets more and more optimized for this use case
Re: JavaScript engines zoo – Compare every JavaScript engine
#15This is super cool, I didn't know JavaScriptCore consistently outperformed V8 And SpiderMonkey seems... not up there compared to the other 2
Disappointing for Firefox for such lower performance. I just ran the JetStream2 benchmark and got: - Firefox: 159 score - Chromium: 235 score That's on latest Fedora Linux and Ryzen 3600 CPU.
M2 Air w/ 24GB RAM macOS 26.2:
- Firefox: 253.584
- Safari: 377.470
- Chrome: 408.332
- Edge: 412.005
Re: JavaScript engines zoo – Compare every JavaScript engine
#16I assume the 98% compatibility on ES6 for V8 is because they don't have tail call optimisation?
Maybe because with tail call optimization you wouldn't have a proper stack trace?
Supposedly, although the team at Apple were able to implement it. I think they had some oddly named technology like Chicken which created a shadow stack trace? Half remembered.
Re: JavaScript engines zoo – Compare every JavaScript engine
#17Is this right? Brimstone has a single contributor, 74k LoC (vs 1.3M for V8) and it's 97% compatible with ES6? That's a staggering accomplishment. https://github.com/Hans-Halverson/brimstone
Wow!
Re: JavaScript engines zoo – Compare every JavaScript engine
#18I never thought they are so many!
Re: JavaScript engines zoo – Compare every JavaScript engine
#19Before looking at the zoo I figured there would be a dozen or so engines compared. Seeing the actual comparison is astounding!
The amount of work just to aggregate and compare is admirable, let alone the effort behind the engines themselves.
Re: JavaScript engines zoo – Compare every JavaScript engine
#20This is super cool, I didn't know JavaScriptCore consistently outperformed V8 And SpiderMonkey seems... not up there compared to the other 2
That’s the promise of Bun - that it is faster because it uses JavascriptCore.
Bun is faster because it implements pretty much everything natively and just exposes them in JS, not because it uses JSCore
I believe long term, V8 will become the undisputed champ again as Google has a lot more incentive than Apple to make the fastest engine, but this is just a wild guess of mine, and I'm biased being a Node.js Collaborator
I've been hearing for a while that JSCore has a more elegant internal architecture than V8, and seeing the V8 team make big architectural changes as we speak seems to support it [1], but like I said, hopefully they will pay off long term
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