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Performance regressions in NVDA with Windows Terminal #14189

@Neurrone

Description

@Neurrone

/CC @codeofdusk

Steps to reproduce:

Use Windows Terminal. In particular:

  • Type in text
  • Use vim to edit a text file and exit, or use git log - anything that clears the screen and switches back once the command finishes
  • Use commands like git status

Basically normal use of the terminal

Actual behavior:

I've noticed that NVDA now lags noticeably:

  • When typing characters into the prompt, there is now a very noticeable delay before key echo occurs
  • When the screen clears such as when exiting editing of a text file with Vim, there is again a noticeable delay before NVDA starts reading text
  • When using commands like git status and nvda+up arrow to read previous lines, NVDA seems to be "stuck" on the last line or two of output for a few seconds before nvda + up arrow is able to read previous lines of output beyond the last 2 lines.

Expected behavior:

None of this should be happening, unsure if it s aregression with NVDA or Terminal

NVDA logs, crash dumps and other attachments:

None

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

alpha-26524,bc1f92f9 (2022.4.0.26524)

Windows version:

10.0.19044.2006

Name and version of other software in use when reproducing the issue:

Windows terminal 1.14.2281.0

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

I have also seen this on another laptop which is on a more recent alpha build

If NVDA add-ons are disabled, is your problem still occurring?

Yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

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    app/windows-terminalNew terminal app, potentially supersedes app/windows-console (repo: microsoft/terminal)bug/regressionclose/works-for-meneeds-technical-investigationA technical investigation is required to progress the issue.p4https://github.com/nvaccess/nvda/blob/master/projectDocs/issues/triage.md#priorityperformancetriagedHas been triaged, issue is waiting for implementation.

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