Laggy UI

[rugk]

Threema Web is sometimes a bit laggy. I have got around 30 contacts and the UI sometimes is a bit slow.
I can especially see it when (fastly) opening the context menu of messages:

Personally I'd say in the beta (before the last RC) it was not so laggy…

[lgrahl]

Nah, it was already laggy in the beta. It gets worse when you scroll up to request older messages. The more messages, the more it lags. You can help by creating a CPU profile in the browser and attach it here.

[rugk]

In Firefox 53.0a2 (2017-02-14) about:performance also shows how it behaves:

[ovalseven8]

Can confirm that it is very laggy. Should be one of the top priorities.

[lgrahl]

Yes, it's a lot worse in Firefox.

[dbrgn]

Yes, it's a lot worse in Firefox.

Yes, Webkit (Chrome/Chromium/Opera) is much faster in this regard.

[rugk]

You can help by creating a CPU profile in the browser and attach it here.

I've sent it to *SUPPORT…
What I did there was not even scrolling up but similar things as shown in the video. Typing text, sending some messages to ECHOECHO opening the context menu for some messages.

[ovalseven8]

@dbrgn: Do you have any ideas how to fix this issue? It's really so bad that using the Web Client is not fun at all. Especially with Firefox it's a pain, however even with Chrome the performance is not great.

[screendriver]

Maybe upgrading to Angular 2 should bring a performance boost 🤔

[dbrgn]

@ovalseven8 yes, mostly #40. I hope that should speed up things a lot. We'll tackle that issue once we fixed the low(er) hanging fruits.

@screendriver Angular 2 is a completely different framework. It would mean porting, not upgrading. When development on Threema Web was started, Angular 2 final wasn't released yet.

Note that performance on Chrome seems to be significantly better than on Firefox.

[ovalseven8]

For 1.0.6 I have the feeling that toggling between different chats got slower. Perhaps can some of you check too?

[rugk]

Try out 1.1.0, which was released today. 😃

[ovalseven8]

Try out 1.1.0, which was released today. 😃

Oh, I mean 1.1.0 of course. 😆

[dbrgn]

Since the UI is much less laggy now, let's close this in favor of #39.

[ovalseven8]

Well, I don't really think it's much less laggy. But #40 will hopefully improve things!

[ovalseven8]

It's still a real pain with Firefox. Threema should definitely focus on improving the performance and efficiency.

While it's a lot better with Chromium (that I don't use), I think the performance could also be better there when opening chats.

[lgrahl]

@ovalseven8 Sure but #39 covers that.

[ovalseven8]

Do not understand why this issue is not priority.

A swift application improves UX dramatically and at the moment it's really bad. Some time ago I tried Chrome just for Threema Web and once I was using it for around an hour (and chat history grew) it also got that slow because loading of chats is an issue also for Chrome then.