Emoji autocomplete is very slow

[f0x52]

Description

When typing text emoticons like :P the whole UI freezes, calculating the possible emoji shortcode completions.

Steps to reproduce

just typing a :P it's not quite 100% reproducible, but rather consistent

Logs being sent: yes

Version information

• Platform: web

For the web app:

• Browser: Firefox developer 83.0b6
• OS: btw i use Arch Linux
• URL: riot.im/develop

[dbkr]

Logs being sent: yes

No logs have come in for this yet, although I'm not sure they'd be useful for this

I do see a tiny bit of stuttering when the emoji completions are displayed. How long does the UI freeze for you?

[f0x52]

whoops forgot to send those, but yeah

according to the performance profiler, it's about 6 seconds, which seems consistent across test as well

[dbkr]

Wow, looks like the browser is spending 6s doing layout. Is there anything notable about your account or setup that might be causing it do render huge amounts of DOM at that point?

[f0x52]

It's a rather big account (sync takes ages) but not sure if any of that would be relevant to the emoji picker?

[f0x52]

Seems it is related to the whole autocomplete UI, as it happens for /command completion as well. Switched to a new session on develop.element.io and it's the same

[yannicka]

@f0x52 are you still experiencing the problem with the most recent versions of Element?

[robintown]

Closing due to lack of info

[Benjamin-L]

I'm still experiencing this on the most recent version any time the autocomplete UI is invoked. One thing that's notable is that I've experienced this behavior on multiple different devices. Two linux machines running firefox and two different macs with firefox. I haven't tested any other browsers.