Composer lag

[lampholder]

Steps to reproduce

1. Where are you starting? What can you see?
   Over the past week or so I've noticed worse and worse lag when typing in the normal, non-WYSIWYG composer.

I've been signed in forever, have slept/woken the computer a few times since the last reboot. There's no typing lag elsewhere on the machine.

Element is using between 5% and 30% CPU and ~1GB RAM.
Machine specs:

• Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz 4.00 GHz
• 32.0 GB
• Windows 10 Pro 22H2 19045.3086

Outcome

What did you expect?

No lag

What happened instead?

Lag

Operating system

Windows 10

Application version

Element version: 1.11.34 Olm version: 3.2.14

How did you install the app?

Website

Homeserver

lant.uk

Will you send logs?

Yes

[lampholder]

Chat effects such as confetti are also very slow.

[weeman1337]

Could be #24091 or #23268

@lampholder thank you for opening the issue. If possible, can you send logs when the composer is lagging? A profile would also help

[lampholder]

I can't generate a profile out of Element Desktop on Windows - the profile generates but saving it saves an empty file.

[lampholder]

I'm getting (less pronounced, but still noticeable) composer lag on Mac, too. I'll send logs for that (attached to this issue) and see if I can dump a profile out of Electron Mac

[lampholder]

Nope, mac profiles also save as zero byte files.

[lampholder]

Is this normal (from activity monitor on the mac)?:

Here's Element X for comparison:

My Electron instance does have encrypted search enabled:

[lampholder]

I've filed another rageshake for this - on firefox at least I'm now seeing regular 10 second pauses interacting with the client at all (so not just typing into the composer, but scrolling/dismissing modals/even copying a link is blocked whilst the browser does whatever it's doing.

[andybalaam]

Firefox 2023-11-24 11.27 profile.json.gz

^ profiling info from Firefox while the composer was lagging (in Element R, local build, though, which muddies the water)

[t3chguy]

@andybalaam is it a development or production build? Development React builds are known to be laggy and it isn't something we can do much if anything about

[andybalaam]

@andybalaam is it a development or production build? Development React builds are known to be laggy and it isn't something we can do much if anything about

This was a dev build, so I guess ignore for now until I can get something more useful.

[richvdh]

presumably it is no longer correct for this to be labelled as X-Needs-Info

[lampholder]

I've got composer lag again having updated to Element version: 1.11.62
Crypto version: Olm 3.2.15 this morning :(

[lampholder]

Suggestion from web team is that (on this occasion at least):

its likely due to element-hq/synapse#16987 which causes #27173

Aside from this, I haven't experience composer lag in recent versions prior to 1.11.62, so perhaps this issue can be closed.

[dasJ]

so perhaps this issue can be closed

Please don't, I have this exact issue on 1.11.79, Crypto version: Rust SDK 0.7.2 (7a21514), Vodozemac 0.7.0