perf!: reduce work to build and fix bugs in TileLayer, and improve culling of off-screen tiles
#210
| Job | Run time |
|---|---|
| 1m 3s | |
| 1m 26s | |
| 1m 29s | |
| 1m 26s | |
| 5m 12s | |
| 4m 16s | |
| 14m 52s |