Performance of WebAssembly Runtimes in 2026

In one line

I wanted to know if WebAssembly runtimes are getting faster.

Opening excerpt

This is a follow-up to the earlier libsodium WebAssembly benchmarks from 2019 , 2021 and 2023 .

Not “does the newest version beat native code in one microbenchmark?”, and not “which runtime has the prettiest benchmark chart?”, but something more boring and more useful:

If I take the same C crypto code, compile it to WebAssembly, and run it on the latest runtime, a runtime from one year ago, and a runtime from two years ago, are things actually improving?

So I benchmarked libsodium on WebAssembly runtimes released around June 2024, June 2025, and June 2026.

(Excerpted from the original; full article via the source link below.)

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