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Rendering slows down under load #1736

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opened 2026-01-30 22:35:07 +00:00 by claunia · 0 comments
claunia commented 2026-01-30 22:35:07 +00:00
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Originally created by @MSFTFox on GitHub (Jun 19, 2019).

Originally assigned to: @miniksa on GitHub.

Environment

Windows build number: Microsoft Windows [Version 10.0.18922.1000]

Steps to reproduce

When working under load, (was building an Android project at the time), I had a second tab open trying to copy/paste or type git commands.

Expected behavior

One tab shouldn't affect another. Rendering on the new tab was error prone with strange behavior at times.

Performing the same actions in a separately opened PowerShell or command prompt window performed as expected with little to no input latency.

Actual behavior

Each character from the pasted text appeared individually, one after another with a noticeable pause in between. Typing regular characters seemed to print out an incorrect character at times which was overwritten moments later by the correct one. At other times, the current line would re-render to the right of the cursor just to be overwritten as the cursor progressed.

Originally created by @MSFTFox on GitHub (Jun 19, 2019). Originally assigned to: @miniksa on GitHub. <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: Microsoft Windows [Version 10.0.18922.1000] ``` # Steps to reproduce When working under load, (was building an Android project at the time), I had a second tab open trying to copy/paste or type git commands. <!-- A description of how to trigger this bug. --> # Expected behavior One tab shouldn't affect another. Rendering on the new tab was error prone with strange behavior at times. Performing the same actions in a separately opened PowerShell or command prompt window performed as expected with little to no input latency. <!-- A description of what you're expecting, possibly containing screenshots or reference material. --> # Actual behavior <!-- What's actually happening? --> Each character from the pasted text appeared individually, one after another with a noticeable pause in between. Typing regular characters seemed to print out an incorrect character at times which was overwritten moments later by the correct one. At other times, the current line would re-render to the right of the cursor just to be overwritten as the cursor progressed.
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Reference: starred/terminal#1736
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