Micro optimization for array_diff

diff --git a/ext/standard/array.c b/ext/standard/array.c
index 808992a2716b1494ee17b1db0a86d844bcdc73fb..91b66615b105b682eab1aec125f1488476e36278 100644 (file)
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -4090,6 +4090,7 @@ PHP_FUNCTION(array_diff)
        zval *value;
        zend_string *str, *key;
        zend_long idx;
+       zval dummy;
 
        if (ZEND_NUM_ARGS() < 2) {
                php_error_docref(NULL, E_WARNING, "at least 2 parameters are required, %d given", ZEND_NUM_ARGS());
@@ -4120,12 +4121,13 @@ PHP_FUNCTION(array_diff)
                return;
        }
 
+       ZVAL_NULL(&dummy);
        /* create exclude map */
        zend_hash_init(&exclude, num, NULL, NULL, 0);
        for (i = 1; i < argc; i++) {
                ZEND_HASH_FOREACH_VAL_IND(Z_ARRVAL(args[i]), value) {
                        str = zval_get_string(value);
-                       zend_hash_add_empty_element(&exclude, str);
+                       zend_hash_add(&exclude, str, &dummy);
                        zend_string_release(str);
                } ZEND_HASH_FOREACH_END();
        }