Hacker News new | ask | show | jobs
by johndough 100 days ago
I ran two experiments:

~20x slower for a naive recursive Fibonacci implementation in Python (1300 ms for fib(30) in this VM vs 65ms on bare metal. For comparison, CPython directly compiled to WASM without VM overhead does it in 140ms.)

~2500x slower for 1024x1024 matrix multiplication with NumPy (0.25 GFLOPS in VM vs 575 GFLOPS on bare metal).
1 comments
apignotti 100 days ago
This is not correct. You are using WebVM here, not BrowserPod.

WebVM is based on x86 emulation and JIT compilation, which at this time lowers vector instructions as scalar. This explains the slowdowns you observe. WebVM is still much faster than v86 in most cases.

BrowserPod is based on a pure WebAssembly kernel and WebAssembly payload. Performance is close to native speed.

link
johndough 100 days ago
I see. I thought they were the same and https://vitedemo.browserpod.io/ failed to load, so I was not able to test there.
link
apignotti 100 days ago
Demo works as expected for me, please share information if possible or join our Discord for further help: https://discord.leaningtech.com
link
johndough 100 days ago
I dug a bit deeper. The cause was that navigator.storage.getDirectory() is not available in Firefox private browsing mode.

The performance is pretty amazing. fib(35) runs in 60ms, compared to 65ms in NodeJS on Desktop.

But I can't find a shell. Is there only support for NodeJS at the moment?

link
apignotti 100 days ago
Only node is supported as of version 1.1, but the next version is fully focused on command line tooling (git, bash, ssh, grep, ...).

See the launch blog post for our full timeline: https://labs.leaningtech.com/blog/browserpod-10

Also, could I ask you to quickly edit your previous comment to clarify you were benchmarking against the older project?

link
johndough 100 days ago
Unfortunately, that comment can not be edited anymore. Maybe @dang can change it or remove the comment chain. I am fine with both.
link