Tab switch looks slow?

[ThomsonTan]

Environment

Windows build number: 10.0.19042.746
Windows Terminal version (if applicable):

Any other software?

Steps to reproduce

Press ctrl+tab to switch tabs, it shows a drop list of tabs, then switch to the next tab.

Expected behavior

The switch should be down immediately if I press ctrl+tab and release the keys immediately.

Actual behavior

But it seems taking almost 1 sec to complete the switch, this sluggish could be very annoy if I want to switch to the next tab for some peeking and switch back.

[Don-Vito]

@ThomsonTan

1. What version of terminal are you using?
2. Does the sluggishness start immediately or after running the Terminal for a while?
3. How many tabs are open?

[ThomsonTan]

1. The version string is Microsoft.WindowsTerminalPreview_1.4.2652.0_x64.
2. I am not sure it start immediately after launch. I just tried launching a separate instance of wt.exe, also with 4 tabs, seems the switching if very fluent.
3. 4 tabs, starts from powershell, but I launched python under cmd.exe within the powershell tab.

[Don-Vito]

Asking this because there are several very similar discussions, around tab switching and drop-down menu becoming sluggish after some time: #7710 (and #8702 that was closed as duplicate)

[Don-Vito]

Also in 1.4 there was some slowness that was related to the amount of tabs (solved in 1.5) but it might be irrelevant if it happens to you with a small amount of tabs as well.

[JohnLukeBentley]

@ThomsonTan have you tried uninstalling Powershell 64 bit and installing Powershell 32 bit (e.g. from https://github.com/PowerShell/PowerShell/releases > Some release > Assests > PowerShell-7.1.1-win-x86.msi)?

[ThomsonTan]

@JohnLukeBentley I haven't tried 32-bit installer. I'd prefer 64-bit in general, but I could try that if it could help gather data for locating the problem.

[JohnLukeBentley]

That solved the problem for me (over in #7710 and #3515). And so yes, that would help with locating the problem(s).

[zadjii-msft]

Alright, hopefully it does help. Otherwise, I'd suggest updating the Terminal - preview just got updated to 1.6 a week ago, so it's very possible that this was fixed sometime in the last two releases

[ghost]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.

[guillebot]

I have the same problem. Extremely slow switching tabs either via ctrl+tab or mouse click.

[zadjii-msft]

You know what, this seems to be happening to me too (on preview 1.6.10272.0). I thought it was just my slaptop chugging because I was building at first, but now I don't think there's anything else running that should cause such a delay.

Weirdly though, it doesn't happen on fresh terminal windows. It's only happening on my primary on that I've been using for a few days. There's nothing weird about it in Task Manager - CPU, memory, GPU all look like they're in reasonable limits. But tab switching (via clicking AND via the ATS), tab creating, pane splitting are all laggy. The command palette takes a while to appear, and long to repopulate when starting to type in it. Heck, even just navigating the new tab dropdown with the arrow keys seems particularly un-responsive.

I'll keep my eye on this one. Maybe over the course of 1.7 we'll have a better idea of what's going on. Maybe I'll get a consistent repro. If anyone has any thoughts, or wants to profile their terminal and figure it out, I'm all ears.

[guillebot]

You know what, this seems to be happening to me too (on preview 1.6.10272.0). I thought it was just my slaptop chugging because I was building at first, but now I don't think there's anything else running that should cause such a delay.

Weirdly though, it doesn't happen on fresh terminal windows. It's only happening on my primary on that I've been using for a few days. There's nothing weird about it in Task Manager - CPU, memory, GPU all look like they're in reasonable limits. But tab switching (via clicking AND via the ATS), tab creating, pane splitting are all laggy. The command palette takes a while to appear, and long to repopulate when starting to type in it. Heck, even just navigating the new tab dropdown with the arrow keys seems particularly un-responsive.

I'll keep my eye on this one. Maybe over the course of 1.7 we'll have a better idea of what's going on. Maybe I'll get a consistent repro. If anyone has any thoughts, or wants to profile their terminal and figure it out, I'm all ears.

My PC is quite powerfull, its an i9-10900 with 64GB RAM and NVME disks. Everything seems to fly but this terminal. There is definitely some problem here.

It's a shame because it is the best terminal I've ever tried for windows, it replicates a lot of nice features I'm used to use in the *nix world.

[guillebot]

Preview seems to do much better!

[zadjii-msft]

You know what, in retrospect, this seems similar enough to #7710 that I'm gonna close this as a dupe to try and keep the discussion contained. Thanks!

/dup #7710

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!