Bug 247261

Summary:

Audio elements with preload=none still result in metadata request

Product:

WebKit

Reporter:

Aphrodite <kokopelli.games>

Component:

Web Audio

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Critical

CC:

cdumez, eric.carlson, jer.noble, karlcow, webkit-bug-importer

Priority:

Keywords:

BrowserCompat, InRadar

Version:

Safari 16

Hardware:

iPhone / iPad

OS:

iOS 16

Attachments:

Description	Flags
Example audio media elements	none
When a large number of audio tag are created, even when preload=none, there is a long period of max CPU and little other activity	none
Whereas the issue fully disappears if audio is moved, leading us to the conclusion that the page is trying to either preload the audio or fetch metadata	none

Aphrodite

Reported 2022-10-31 08:42:38 PDT

Created attachment 463319 [details] Example audio media elements Our application has a significant number of audio elements that are created, with preload=none. On all non-webkit browsers, this currently does not cause a problem. However on iOS safari, chrome, firefox, and Mac Safari, there are several seconds of the page fully freezing when the new audio tracks are created. This issue completely disappears when the audio elements are removed from their locations, so the web application is clearly reading them. See attached screenshots of the behavior.

Attachments
Example audio media elements (36.80 KB, image/png) 2022-10-31 08:42 PDT, Aphrodite	no flags	Details
When a large number of audio tag are created, even when preload=none, there is a long period of max CPU and little other activity (142.45 KB, image/png) 2022-10-31 08:53 PDT, Aphrodite	no flags	Details
Whereas the issue fully disappears if audio is moved, leading us to the conclusion that the page is trying to either preload the audio or fetch metadata (421.85 KB, image/png) 2022-10-31 08:54 PDT, Aphrodite	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Aphrodite

Comment 1 2022-10-31 08:53:13 PDT

Created attachment 463320 [details] When a large number of audio tag are created, even when preload=none, there is a long period of max CPU and little other activity

Aphrodite

Comment 2 2022-10-31 08:54:08 PDT

Created attachment 463321 [details] Whereas the issue fully disappears if audio is moved, leading us to the conclusion that the page is trying to either preload the audio or fetch metadata

Radar WebKit Bug Importer

Comment 3 2022-11-07 07:43:19 PST

<rdar://problem/102040607>

Note You need to log in before you can comment on or make changes to this bug.