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perf: compute the tile cover once per camera - #2288
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The tile layer computed the cover, its buffer and its keep set for both the build and the tile update event of each camera, and the separating axis test allocated for every tile it tested. While rotating at 60° on a Pixel 4a, the median build time per frame drops from 7.3 ms to 4.7 ms; the tiles loaded don't change.
greensopinion
added this pull request to stack #2284
October 25, 2026 23:28
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The tile layer computed the cover, its buffer and its keep set for both
the build and the tile update event of each camera, and the separating
axis test allocated for every tile it tested. While rotating at 60° on a
Pixel 4a, the median build time per frame drops from 7.3 ms to 4.7 ms;
the tiles loaded don't change.
Depends on #2287.
I wrote this with Claude Code (Claude Opus 5.5). I directed the design,
reviewed the code, and tested it on a Mac, an iPhone 13, an iPhone 15 Pro
Max, a Pixel 4a (5G), and in Chrome.