updated for version 7.3.988

Problem:    New regexp engine is slow.
Solution:   Break out of the loop when the state list is empty.

src/regexp_nfa.c

@@ -2951,6 +2951,11 @@ again:
 #ifdef NFA_REGEXP_DEBUG_LOG
 	fprintf(debug, "\n-------------------\n");
 #endif
+	/*
+	 * If the state lists are empty we can stop.
+	 */
+	if (thislist->n == 0 && neglist->n == 0)
+	    break;
 
 	/* compute nextlist */
 	for (i = 0; i < thislist->n || neglist->n > 0; ++i)

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    988,
 /**/
     987,
 /**/