Hacker News Reader

HNHacker News

Top New Best Ask Show Jobs

Comment by Retr0id | Hacker News Reader

Parent Full thread

Retr0id·

Based on the screen recording demo it looks unexpectedly slow. What's the bottleneck?

View on HN

Software linked with Cosmopolitan Libc usually goes 2x faster than Musl.

- https://justine.lol/cosmo3/

- https://twitter.com/JustineTunney/status/1726141024597324189...

What exactly looked slow to you?

In the screen recorded demo gif in the article, it takes several seconds for the "/python" and "/cosmopolitan" requests to load (although the index page seemed to load pretty quick).

It's probably due to Chrome penalizing the connection for not being HTTPS

The interpreter is linked to a cross-platform libc-like library, and compiled to a funky executable format, supporting multiple OS targets simultaneously. The initialisation and startup are probably computationally-intensive.

We can see the initial startup speed from the time it takes the command in the terminal to print something, which isn't so bad (looks like under a second).

Maybe Flask is forking on each request, which I could imagine being slow, but not slower than the initial process startup.

ahgamut is a college student. He doesn't have $15,000 workstations like us.

My 4-core computer's probably building Cosmopolitan Libc in the background + the Python binary is 2.7 unoptimized. This blog post is originally from 2021.

The "Python", the "Actually" and the "Portable" parts.

I'm aware of both Python and Cosmopolitan implementation details and neither of these things explain a multi-second page load.

Reply on news.ycombinator.com