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[Performance] Fast path for RenderData::IsCursorDoubleWidth #14283

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opened 2026-01-31 04:06:10 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 04:06:10 +00:00
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Originally created by @skyline75489 on GitHub (Jun 21, 2021).

This is a sister issue of #10393.

Currently an unreasonable amount of CPU is wasted in checking IsCursorDoubleWidth in the buffer, due to the expensive construction of TextBufferCellIterator. I think it's fair to find a fast path for people who don't use width characters at all.

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Originally created by @skyline75489 on GitHub (Jun 21, 2021). This is a sister issue of #10393. Currently an unreasonable amount of CPU is wasted in checking `IsCursorDoubleWidth` in the buffer, due to the expensive construction of `TextBufferCellIterator`. I think it's fair to find a fast path for people who don't use width characters at all. ![image](https://user-images.githubusercontent.com/4710575/122703646-a757d780-d284-11eb-9f1a-689951091275.png)
claunia added the Help WantedProduct-ConhostIssue-TaskArea-Performance labels 2026-01-31 04:06:10 +00:00
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Reference: starred/terminal#14283
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