perf!: reduce work to build and fix bugs in TileLayer, and improve culling of off-screen tiles
#213
| Job | Run time |
|---|---|
| 1m 20s | |
| 52s | |
| 1m 3s | |
| 4m 19s | |
| 1m 30s | |
| 4m 31s | |
| 13m 35s |