Changes touching this path

• the graph rewrite a finalize pays reads the graph file back deferred and copies each manifest stored frames where Manifest::frames proves them to be what encoding its map writes (no backslash key, keys strictly ascending in Path order, UTF-8 holder names), and falls back to the eager read otherwise, so save_to no longer decodes every path of every change in history to add one change. the new --graph-rewrite opt-in half times that whole save at 200 paths; paired, three interleaved rounds, the gate reading load idle at 1 to 4 percent: 48.18 to 48.48 ms down to 12.65 to 12.72 ms at depth 256, 183.43 to 183.49 down to 39.14 to 39.47 ms at 1024, and 750.3 to 759.4 down to 179.5 to 182.6 ms at 4096. counted by the new graph_rewrite_allocations test, the save at depth 1024 allocates 6,039 and 6,061 times on two runs against 695,198. the file written is byte-identical to the decoding rewrite, pinned over every golden and a lone y//ab key (copied), the legacy separator and the #2273 shapes (not copied, rebuilt from the eager read), and a key or holder name that is not UTF-8 (not copied, and the save still refuses it). red under mutation, counts read each time: the eager read put back (1 passed and 1 failed), the holder check dropped, the ascent check dropped and the eager fallback dropped (1 and 1 each), the counts check dropped (0 and 2), restored to 2 passed each. riding along: HUNT-PERF names the new half, and the visibility census names the moved and new bindings. no migration and no format byte moves, so this owes no deploy. the workspace suite is green (4278 passed over 137 binaries, 11 ignored) (#2280) e7d666e0 · dbf3dbe6…

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.