Engineering of the fastest WebAssembly interpreters (wasmi-labs.github.io)

64 pointsby herobird2 days ago4 comments

josephg 4 hours ago

Very cool!

How does the performance of this wasm interpreter compare to native execution? Are we getting close?

And you’re comparing against wasmtime.pulley, which is their optimising interpreter. How does it stack up against wasmtime’s cranelift compiler?

achierius 3 hours ago

No, they're not getting close. Top performing Wasm runtimes (like those in V8 and JSC) are generally between 10% (for pure math workloads) and 2x (conservatively, for ef allocation heavy ones) the speed of equivalent native implementations. But that's including the JIT compilation tiers; the performance of interpreters alone lags by an order of magnitude.

paulddraper 3 hours ago

Between 10% and 100% ? Am I understanding that right?

achierius 5 minutes ago

I put that poorly: read as 110% and 200%