1813557 - JS demo (https://www.fxhash.xyz/generative/19596) takes half the time to load in Chrome compared to Nightly

Status: NEW

(Core :: JavaScript Engine, task, P3)

Description

[Mayank Bansal]

Go to https://www.fxhash.xyz/generative/19596 (The exact hash is profiled is https://gateway.fxhash2.xyz/ipfs/QmaYyWpvzuLn8aPB7V4bX4GxyUKmKeoz1nDmSfZmTytZHE/?fxhash=ooaotgDQD5C11PgwDs7386ydt2J7RJAEYndfTnW9vYsLSSYSWwh)

Click on "Open"

Nightly: https://share.firefox.dev/3RgRv2J (67 seconds to load)
Chrome (Partial profile of first 10 seconds) : https://share.firefox.dev/3Y5R7GK ( Took 29 seconds wall clock time)

Comment 1

[Jan de Mooij [:jandem]]

This is showing a lot of bound function overhead.

Comment 2

[Mayank Bansal]

Profile with the latest Nightly: https://share.firefox.dev/3SypGUa

Comment 3

[Jan de Mooij [:jandem]]

What times are you seeing now, compared to the 67 seconds in comment 0? I don't see anything related to bound function calls in your latest profile, so that suggests the JIT optimization for it works.

Comment 4

[Jan de Mooij [:jandem]]

There are other things too, for example some very slow Math.hypot calls because the JIT isn't optimizing them for some reason.

Comment 5

[Mayank Bansal]

(In reply to Jan de Mooij [:jandem] from comment #3)

What times are you seeing now, compared to the 67 seconds in comment 0? I don't see anything related to bound function calls in your latest profile, so that suggests the JIT optimization for it works.

It is now ~55 seconds (what the profiler shows) and ~44 second wall-clock time
Chrome is 23-30 second (wall-clock time)

Comment 6

[Mayank Bansal]

Nightly: https://share.firefox.dev/3W5FaS5 (36s with profiler, 26s wall clock)
Chrome: https://share.firefox.dev/4f4jdeu (20s with profiler 16s wall clock)