1945316 - Testcase generating N sine waves spends infinite time in GraphRunner (and uses some time on parent-process and content-process)

Status: RESOLVED WORKSFORME

(Core :: Web Audio, defect)

Description

[Mayank Bansal]

Attachment: Audio generate sine wave.HTML

Open attached testcase
Enter 5000 or 50000
Press enter
Dont try this at home with Chrome, or you gonna have a bad time.

5000

• Nightly: https://share.firefox.dev/3Q1CWQW
• Chrome: LoL

50000

• Nightly: https://share.firefox.dev/3PXTsRM
• Chrome: You serious bro?

I noticed that the graphrunner thread continues to use CPU. Not sure if thats expected. Appears to be a defect, but what do i know.

Ni? from :padenot

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Paul Adenot (:padenot)]

Interesting testcase, creating a few thousand AudioContext. Usually you'd create a single AudioContext and a few thousand OscillatorNode.

Because of our architecture, it works, but it's really strange code.

Comment 3

[Mayank Bansal]

Attachment: audio oneaudiocontext multiple convolvers.HTML

500K generating and playing
Nightly: , https://share.firefox.dev/40ZTnDC (50 second to geenrate, infinite time to play)
Chrome: better

500k generating and reloading: https://share.firefox.dev/3WJKv2z (60 second to generate, 75 seconds around cc)

100k
Chrome: https://share.firefox.dev/4aJHu7Y (3.6s)
Nightly: https://share.firefox.dev/3Eq24OU (2.1s)

200k Cleanup: https://share.firefox.dev/4gp8N94

Comment 4

[Paul Adenot (:padenot)]

We're spending the CPU as expected in those very heavy test cases, thanks for verifying it doesn't fall apart!

Closing as WORKSFORME.