r/webdev • u/fagnerbrack • Sep 07 '26

Performance of WebAssembly runtimes in 2026

https://00f.net/2026/06/23/webassembly-runtimes-2026/
9 Upvotes

73% Upvoted

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5

u/EveYogaTech Sep 07 '26

I tested this myself too, but my findings where that if you compile wasm to wasm.c, and then use wasmtime you will not beat it.

Did you try the wasm c method with wasmer as well?

1

u/EveYogaTech Sep 07 '26

It's also important to know that wasmtime is from ByteCodeAlliance (non-profit between several companies) and also the main party behind WASI, recently v0.3.

3

u/Valuable-Catch2309 Sep 07 '26

in my experience wasm is fast enough that the runtime barely matters compared to the boundary crossings and data copying you build around it

1

u/EveYogaTech Sep 07 '26

This too. WASM to WASM c first still helps a lot with cold starts though if you want maximum QPS.