1635979 - Slow page loading on YouTube

Status: RESOLVED WORKSFORME

(Core :: Networking, defect)

Description

[Asif Youssuff]

Reported on https://www.reddit.com/r/firefox/comments/geqsw9/massive_webpage_loading_delay_and_slowdown/

Basic information

More information

Profile URL: https://profiler.firefox.com/public/017fd09c643750716176e0da00303666112ad832/calltree/?globalTrackOrder=6-7-8-0-1-2-3-4-5&hiddenGlobalTracks=1-2-3&hiddenLocalTracksByPid=40308-2&localTrackOrderByPid=17140-1-0~18916-0~40400-0~40308-0-1-2~&thread=5&v=4

Basic systems configuration:

OS version: Windows 10

GPU model: Nvidia GeForce GTX 1080

Number of cores: 4 (i7-3820)

Amount of memory (RAM): 16GB

Thanks so much for your help.

Comment 1

[Asif Youssuff]

Attachment: about:support

Comment 2

[Sean Feng [:sefeng211]]

It looks like just some slow network requests. When the Browser starts, it made some requests to mozilla services which took a long time, so they looked concerning.

Markus, sorry to bother your again, would you be able to tell anything?

Comment 3

[Markus Stange [:mstange]]

I agree - the delay is due to something on the network side or in the network code.
For example, in this 1.2 second excerpt, only four images finish loading: https://perfht.ml/2yOGa6u (you can see them pop in in the screenshots track). They're spaced apart by 300ms of nothingness.
In the network panel, the tooltip says that we are "Waiting for socket thread" during the delay, but that is misleading and could mean anything (bug 1618687).

Comment 4

[Denis Palmeiro [:denispal]]

Sending it to the necko folks to see if they notice anything.

Comment 5

[Dragana Damjanovic [:dragana]]

Nhi, we need someone to investigate this?

Comment 6

[Nhi Nguyen (:nhi)]

Honza, could you please investigate?

Comment 7

[Honza Bambas (:mayhemer)]

I'll ask for an http log. Thanks.
Profiles are not detailed enough to look deeper in the networking core.

Comment 8

[Asif Youssuff]

From the user:

I have solved my issue by total reformat and reinstalling clean windows. Whatever the bug is it must have been buried pretty deep.