Replaced SSGROW with SSCHECK inside regcppush

Observed is huge slow-down on Win32 machines
with many leveled nested recursive patterns.
Bottleneck identified to be SSGROW reallocations
inside regcppush.

Replacing with SSCHECK yields huge performance gains
(to the extened for it to be called a "fix") on said platform.

1 files changed, 1 insertions, 1 deletions

diff --git a/regexec.c b/regexec.c
index eeaa40e90f..92154c555b 100644
--- a/regexec.c
+++ b/regexec.c
@@ -262,7 +262,7 @@ S_regcppush(pTHX_ const regexp *rex, I32 parenfloor, U32 maxopenparen _pDEPTH)
             );
     );
 
-    SSGROW(total_elems + REGCP_FRAME_ELEMS);
+    SSCHECK(total_elems + REGCP_FRAME_ELEMS);
 
     /* memcpy the offs inside the stack - it's faster than for loop */
     memcpy(&PL_savestack[PL_savestack_ix], rex->offs + parenfloor + 1, paren_bytes_to_push);