In Perl_hv_iternext_flags(), clarify and generalise the empty hash bailout code.

diff --git a/hv.c b/hv.c
index 5f233d6..ebb10fb 100644 (file)
--- a/hv.c
+++ b/hv.c
@@ -2144,10 +2144,9 @@ Perl_hv_iternext_flags(pTHX_ HV *hv, I32 flags)
        }
     }
 
-    /* Quick bailout if the hash is empty anyway.
-       I don't know if placeholders are included in the KEYS count, so a defensive check
-    */
-    if (HvKEYS(hv) || (flags & HV_ITERNEXT_WANTPLACEHOLDERS)) {
+    /* Skip the entire loop if the hash is empty.   */
+    if ((flags & HV_ITERNEXT_WANTPLACEHOLDERS)
+       ? HvTOTALKEYS(hv) : HvUSEDKEYS(hv)) {
        while (!entry) {
            /* OK. Come to the end of the current list.  Grab the next one.  */