Saying goodbye to asm.js

#1

Post by eqrion » Wed, May 20, 2026, 12:01 PM UTC

Saying goodbye to asm.js
spidermonkey.dev

Re: Saying goodbye to asm.js

#2

Post by theultdev » Wed, May 20, 2026, 1:09 PM UTC

Sad day. I have a sha256 hasher in asm.js that's faster than any wasm solution.

Re: Saying goodbye to asm.js

#3

Post by koolala » Wed, May 20, 2026, 1:11 PM UTC

Never saw those monkey prints before

https://monkeyink.com/ink/blog/archives/2016/08/_this_is_a_f...

"The image is a collage of antique open source art reflecting the open source code."

Re: Saying goodbye to asm.js

#4

Post by lukan » Wed, May 20, 2026, 1:14 PM UTC

theultdev wrote: post #2

Sad day. I have a sha256 hasher in asm.js that's faster than any wasm solution.

That is surprising. Do you know the reasons? Is it a special use case or was asm really faster? I find that hard to believe.

Re: Saying goodbye to asm.js

#5

Post by css_apologist » Wed, May 20, 2026, 1:20 PM UTC

o7

Re: Saying goodbye to asm.js

#6

Post by theultdev » Wed, May 20, 2026, 1:23 PM UTC

lukan wrote: post #4

theultdev wrote: post #2

Sad day. I have a sha256 hasher in asm.js that's faster than any wasm solution.

That is surprising. Do you know the reasons? Is it a special use case or was asm really faster? I find that hard to believe.

It's a custom solution, but nothing special just incremental hashing for large files.

I took off the shelf wasm crypto libraries to compare it, but the leading one was 10x slower.

Re: Saying goodbye to asm.js

#7

Post by stkdump » Wed, May 20, 2026, 1:30 PM UTC

There goes my plan to use js code generation at runtime to make my algorithms faster. Doing this with wasm will be much harder.

Re: Saying goodbye to asm.js

#8

Post by throawayonthe » Wed, May 20, 2026, 1:32 PM UTC

theultdev wrote: post #6

lukan wrote: post #4

Earlier quoted context omitted.

That is surprising. Do you know the reasons? Is it a special use case or was asm really faster? I find that hard to believe.

It's a custom solution, but nothing special just incremental hashing for large files. I took off the shelf wasm crypto libraries to compare it, but the leading one was 10x slower.

can we see?

Re: Saying goodbye to asm.js

#9

Post by theultdev » Wed, May 20, 2026, 1:33 PM UTC

throawayonthe wrote: post #8

theultdev wrote: post #6

Earlier quoted context omitted.

It's a custom solution, but nothing special just incremental hashing for large files. I took off the shelf wasm crypto libraries to compare it, but the leading one was 10x slower.

can we see?

yeah check back at the end of the day.

will try to rip it out of the project and put it in a standalone benchmark.

Re: Saying goodbye to asm.js

#10

Post by drob518 » Wed, May 20, 2026, 1:39 PM UTC

Asm.js is dead! Long live WebAssembly!