Poor Terminal Performance

[emreaydinceren]

• VSCode Version: 1.35.0
• OS Version: Win 10 19H1

Tried with --disable-gpu, didn't make any difference.
Tried with terminal.integrated.rendererType = dom , didn't make any difference.

Steps to Reproduce:

1. Open powershell in terminal
2. dir -Recurse

Does this issue occur when all extensions are disabled?: Yes
Benchmark Profile-Fast.zip
Profile-Slow.zip

[Tyriar]

So the fast one is using the canvas renderer and the slow one is using the DOM renderer. Could you set terminal.integrated.rendererType to canvas and do another profile on the slow machine?

[Tyriar]

Something else to try is setting terminal.integrated.windowsEnableConpty to false and relaunching the terminal, if that fixes the problem then this is a duplicate of #74620

[emreaydinceren]

setting terminal.integrated.windowsEnableConpty to false fixed the issue

[reinux]

How long is it supposed to take to print 10,000 lines of ints?

This (F#) code takes upwards of 2 seconds to complete in F# Interactive in VSCode and 0.08 seconds in VS2019:

``for i in 1..10000 do printfn "%A" i`

VSCode:

VS2019:

Tried --disable-gpu, turning off windowsEnableConpty, changing renderType, uninstalling VSCode and removing %appdata% and .vscode, a different computer...

[Tyriar]

@reinux that looks like #74620