human-asmjs
iswasmfast
human-asmjs | iswasmfast | |
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1 | 4 | |
130 | 195 | |
- | - | |
0.0 | 0.0 | |
almost 7 years ago | almost 2 years ago | |
JavaScript | ||
- | MIT License |
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human-asmjs
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Is WebAssembly magic performance pixie dust?
One of my colleagues told me to stop doing that because in (I think) V8 these values are immediately converted back to a double nowadays. So annotating all code with |0 doesn't really add speed benefits there, just extra conversions between doubles and integers. Said colleague used to maintain human-asmjs so I trust he knows what he's talking about.
[0] https://github.com/zbjornson/human-asmjs
iswasmfast
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Pay Attention to WebAssembly
At a glance, the bindings for wasm copy the data,
https://github.com/zandaqo/iswasmfast/blob/54bbb7b539c127185...
If the running code is short enough then that copy might easily make the wasm version much slower. That is indeed a known downside of wasm (calls to JS are somewhat slow, and copying of data even more so - wasm shines when you can avoid those things).
If it's not that, then a 10x difference suggests you are running into some kind of a VM bug or limitation.
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Node.js 16 Available Now
WASM has its moments, as you can see in this[1] benchmark it outperforms JS and native addons on certain tasks.
Since the bottleneck with native addons is usually data copying/marshalling, and we have direct access to WebAssembly memory from the JavaScript side, using WebAssembly on this "shared" memory might become the best approach for computationally heavy tasks. I wrote about it a bit here[2].
[1] https://github.com/zandaqo/iswasmfast
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Is WebAssembly magic performance pixie dust?
A few years ago I did similar comparison but in context of Node.js and sans manual optimizations: https://github.com/zandaqo/iswasmfast
In my work, I have come to conclusion that it seldom pays off to go "native" when working with Node.js. More often than not, rewriting some computationally heavy code in C and sticking it as a native module yielded marginally better results when compared with properly optimized js code. Though, that doesn't negate other advantages of using said technologies: predictable performance from the start and re-using existing code base.
What are some alternatives?
expresscpp - Fast, unopinionated, minimalist web framework for C++ Perfect for building REST APIs
neon - Rust bindings for writing safe and fast native Node.js modules.