enable-throttle-display-none-and-visibility-hidden-cross-origin-iframes flag about devtools HOT 2 OPEN

Interesting, the flag isn't in Edge indeed. Even if Edge is also based on Chromium, it's not surprising that there would be subtle differences like this one. That being said if you tested in chrome with/without the flag and it didn't make a difference, then it's most likely something else.

Curious: how do you test for performance in the hidden iframe? What tool do you use?

from devtools.

@captainbrosset I did some performance profiling with the DevTools. It accentuates the slowness with the added overhead, so that's pretty easy to replicate by doing some "heavy" task in an iframe while "display: none" is applied to it. In our case we're loading/parsing/executing JS in it.

I know it's probably something else than this flag, but I'm still curious as to what Edge is/isn't doing in this case (there must be something I would imagine)

from devtools.