Add fine-grained tree-structure tracking in xilem and effcient tree-updates in xilem_web
#163
| Job | Run time |
|---|---|
| 13s | |
| 2m 17s | |
| 1m 32s | |
| 1m 40s | |
| 1m 0s | |
| 1m 1s | |
| 1m 30s | |
| 9m 13s |