1458073 - Nimbledroid's abcnews.go.com page load test is 2x slower in GeckoView than WebView

Status: RESOLVED WORKSFORME

(GeckoView :: General, defect, P2)

Description

[Chris Peterson [:cpeterson]]

Nimbledroid test results:

Klar+WebView = 6.0 seconds

https://nimbledroid.com/my_apps/org.mozilla.focus.debug?a=d78f816d-3591-4203-9820-bed76f107406

Klar+GeckoView = 11.5 seconds 

https://nimbledroid.com/my_apps/org.mozilla.klar.gecko.debug?a=aa414153-e579-4f7b-a5ee-850b48f5b70a#summary 

Randell saw similar Firefox performance problems on desktop when profiling abcnews.go.com, so this is not an Android-specific problem.

Randell says: "the redirect to abcnews.go.com takes 930ms for us, 434 for Chrome(!)  I see some explanation of this when I look at the size: 41.4K for Chrome, 197.41K for us!  (201793 bytes vs 42004 bytes).  So nowhere *near* the same content."

Is abcnews.go.com serving different content to Firefox and Chrome? To my eye, the pages look the same.

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Hey miketaylr, sounds like we're being served different content compared to Chrome here... does anybody on your team have cycles to figure out why that might be?

Comment 2

[Mike Taylor [:miketaylr]]

Chris, do you have UA strings for both versions you're testing against? I don't have access to those links.

(leaving ni?)

Comment 3

[David Bolter [:davidb] (NeedInfo me for attention)]

P2 feels right as a default for performance bugs tied to our nimbledroid informed perf work.

Comment 4

[Chris Peterson [:cpeterson]]

Klar+GV is not blocking tracking scripts correctly (bug 1459037), so we can't fairly compare Focus+WebView vs Klar+GeckoView yet.

Comment 5

[Chris Peterson [:cpeterson]]

WFM because Fenix is currently only 6.67% slower than Chrome Beta:

Chrome Beta: 7.80 ms
Fenix: 8.32 ms
Fenix slowdown: -6.67%
GVE: 13.29ms (Why is GVE so much slower than Fenix??)

https://health.graphics/android/graph?site=https://abcnews.go.com/