Jonas Schievink e8dc07c242
Rollup merge of #77005 - ssomers:btree_cleanup_3, r=Mark-Simulacrum
BtreeMap: refactoring around edges

Parts chipped off a more daring effort, that the btree benchmarks judge to be performance-neutral.

r? @Mark-Simulacrum
2020-09-25 19:42:31 +02:00
..