1507271 - tripadvisor.ca loads very slowly in GeckoView Example

Status: RESOLVED WORKSFORME

(GeckoView :: General, enhancement, P3)

Description

[Beth Rennie [:beth] (she/her)]

Compared to Chrome beta (71), we load tripadvisor.ca very slowly. Chrome seems to finish loading in a few seconds, whereas we are taking upwards of 30s to do a full load. We also get a slow running script warning while loading, while Chrome does not run into this.

Profiles

Without tracking protection: https://perfht.ml/2TeHKnA
With tracking protection: https://perfht.ml/2zSDlO1

The profiles were captured on a Moto G5 with GeckoView Example 65.

Comment 1

[Beth Rennie [:beth] (she/her)]

Here are profiles without remote devtools open:

Without tracking protection: https://perfht.ml/2Tuwqnr
With tracking protection: 

The look of the website has changed and I am not always getting a slow script warning; I only received one on the profile with tracking protection this time, whereas in both of the previous profiles that occurred.

Without tracking protection: https://perfht.ml/2TxZuKr
With tracking protection: https://perfht.ml/2Ty1IJS

Comment 2

[Kannan Vijayan [:djvj]]

Denis Palmiero noted that we're doing a lot of transitions between Interpreter and Baseline in this startup profile.  The overhead of these is currently very high but Jan's compiled interpreter should help that situation (as well as other page-load situations) quite a bit.  Linking as see-also to bug 1499324.

Comment 3

[Chris Peterson [:cpeterson]]

Testing on my Moto G5, tripadvisor.ca page load times doesn't seem much slower in Fennec 68, Focus (GV 69), or Fenix (GV 70 Beta) than in Chrome. I count about 2-3 seconds to first paint and then another 2-4 seconds for complete page load (all images).

Comment 4

[Alex Thayer [:alexical] (she/her)]

I'm not able to reproduce this. Closing - feel free to reopen if you observe it.