1110024 - [e10s] Slow performance of back button with complex site

Status: RESOLVED FIXED

(Core :: DOM: Content Processes, defect)

Description

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

STR:
1. Visit the given URL.
2. Click the "earth" button and change some parameters several times (to accumulate history).
3. Hold down on the back button.

The menu will take a long time to come up and the UI will be frozen during that time. We're using CPOWs here, but I wonder why it's so slow. We're continuing to draw the web content the whole time, so the content process is making progress.

Perhaps the content process only answers one CPOW per frame and we're sending a lot of CPOWs to build the history menu? It looks like we use about 6 CPOW messages per menu item. I only get a few frames per second, so this is conceivable.

Comment 1

[Neil Deakin]

We're not using cpows anymore since bug 1148505. Maybe we could retest.

Comment 2

[Neil Deakin]

This menu comes up at a good speed for me from just looking at it. I suspect we can close this.

Comment 3

[Brad Lassey [:blassey] (use needinfo?)]

Works pretty decently for me as well. Bill, do you think we can close this?

Comment 4

[Bill McCloskey [inactive unless it's an emergency] (:billm)]

Thanks.