diff rust/Cargo.lock @ 49520:eb02decdf0ab

dirstate-v2: skip evaluation of hgignore regex on cached directories

By making the computation of [has_ignored_ancestor] lazy we're eliding
its computation in the common case when none of its descendants have
changed on disk.

On a ~400k files repo, with a cached status, we saw a ~64% reduction
in CPU time, resulting in a speedup of ~10-15% (on ZFS), and a speedup
of ~38% of XFS (XFS has faster stat operations for some reason).

--- a/rust/Cargo.lock	Fri Sep 30 09:05:48 2022 -0600
+++ b/rust/Cargo.lock	Mon Oct 10 14:48:39 2022 +0100
@@ -468,6 +468,7 @@
  "log",
  "memmap2",
  "micro-timer",
+ "once_cell",
  "ouroboros",
  "pretty_assertions",
  "rand 0.8.5",
@@ -687,6 +688,12 @@
 ]
 
 [[package]]
+name = "once_cell"
+version = "1.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f7254b99e31cad77da24b08ebf628882739a608578bb1bcdfc1f9c21260d7c0"
+
+[[package]]
 name = "opaque-debug"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"