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Optimize ImGui renderer: viewport culling and width caching
kyle released this
2026-04-20 22:12:44 +00:00 | 0 commits to master since this releaseLarge files made idle CPU spike because every frame re-measured every
line, recompiled the search regex per line, and ran full per-line
rendering work even for off-screen rows.- Render only visible rows (with a small margin for smooth scrolling)
and advance the layout cursor to preserve total content height. - Hoist the search std::regex compilation out of the per-line loop.
- Cache the max line width on the renderer; reset only when the buffer
or font changes, not on every edit.
Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com
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- Render only visible rows (with a small margin for smooth scrolling)