skip extra check

Author: ndossche

ext/json/json_encoder.c

@@ -587,9 +587,10 @@ zend_result php_json_escape_string(
 			int input_range_mask = _mm_movemask_epi8(input_range);
 			if (input_range_mask != 0) {
 				max_shift = zend_ulong_ntz(input_range_mask);
-				if (max_shift <= 1) {
+				if (UNEXPECTED(max_shift <= 1)) {
 					/* not worth it */
-					break;
+					us = (unsigned char)s[pos];
+					goto fallback;
 				}
 			}
 
@@ -650,6 +651,7 @@ zend_result php_json_escape_string(
 			pos++;
 			len--;
 		} else {
+fallback:;
 			if (UNEXPECTED(us >= 0x80)) {
 				zend_result status;
 				size_t pos_old = pos;