From: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
Bump the maximum specification node depth from 3 to 4 based on updated
benchmark on Fedora 41:
Benchmark 1: /tmp/destdir3/sbin/restorecon -vRn /
Time (mean ± σ): 1.397 s ± 0.018 s [User: 0.755 s, System: 0.641 s]
Range (min … max): 1.353 s … 1.419 s 20 runs
Benchmark 1: /tmp/destdir4/sbin/restorecon -vRn /
Time (mean ± σ): 1.376 s ± 0.021 s [User: 0.737 s, System: 0.637 s]
Range (min … max): 1.348 s … 1.414 s 20 runs
Benchmark 1: /tmp/destdir5/sbin/restorecon -vRn /
Time (mean ± σ): 1.389 s ± 0.021 s [User: 0.748 s, System: 0.640 s]
Range (min … max): 1.351 s … 1.420 s 20 runs
---
libselinux/src/label_file.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libselinux/src/label_file.h b/libselinux/src/label_file.h
index 597b756e..41b2a939 100644
--- a/libselinux/src/label_file.h
+++ b/libselinux/src/label_file.h
@@ -105,10 +105,10 @@ struct literal_spec {
* Max depth of specification nodes
*
* Measure before changing:
- * - 2 leads to slower lookup
- * - >4 require more memory (and allocations) for no performance gain
+ * < leads to slower lookup
+ * > require more memory (and allocations) for no performance gain
*/
-#define SPEC_NODE_MAX_DEPTH 3
+#define SPEC_NODE_MAX_DEPTH 4
/* A specification node */
struct spec_node {
--
2.45.2
