PL_registered_mros can start with 1 hash bucket, as it will probably never

contain more than "dfs", and even if C3 is loaded, 2 buckets are less than the
default of 8.

diff --git a/perl.c b/perl.c
index 27aff77..7c5da00 100644 (file)
--- a/perl.c
+++ b/perl.c
@@ -462,6 +462,8 @@ perl_construct(pTHXx)
 #endif
 
     PL_registered_mros = newHV();
+    /* Start with 1 bucket, for DFS.  It's unlikely we'll need more.  */
+    HvMAX(PL_registered_mros) = 0;
 
     ENTER;
 }