av_create_and_push/unshift_one: faster create via newAV_alloc_xz

Perl · Jul 31, 2021 · 71ca71b · 71ca71b
1 parent 541e9af
commit 71ca71b
Showing 1 changed file with 13 additions and 7 deletions.
diff --git a/av.c b/av.c
@@ -638,9 +638,11 @@ Perl_av_create_and_push(pTHX_ AV **const avp, SV *const val)
 {
     PERL_ARGS_ASSERT_AV_CREATE_AND_PUSH;
 
-    if (!*avp)
-        *avp = newAV();
-    av_push(*avp, val);
+    if (!*avp) {
+        *avp = newAV_alloc_xz(4);
+        AvARRAY(*avp)[ ++AvFILLp(*avp) ] = val;
+    } else
+        av_push(*avp, val);
 }
 
 /*
@@ -727,10 +729,14 @@ Perl_av_create_and_unshift_one(pTHX_ AV **const avp, SV *const val)
 {
     PERL_ARGS_ASSERT_AV_CREATE_AND_UNSHIFT_ONE;
 
-    if (!*avp)
-        *avp = newAV();
-    av_unshift(*avp, 1);
-    return av_store(*avp, 0, val);
+    if (!*avp) {
+        *avp = newAV_alloc_xz(4);
+        AvARRAY(*avp)[ ++AvFILLp(*avp) ] = val;
+        return val;
+    } else {
+        av_unshift(*avp, 1);
+        return av_store(*avp, 0, val);
+    }
 }
 
 /*