From: Dmitry Stogov <dmitry@zend.com>
Date: Thu, 11 Jan 2018 16:50:27 +0000 (+0300)
Subject: Reorder zend_op_array fields for better data locality and packing
X-Git-Tag: php-7.3.0alpha1~657
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=70aa967d81666dd7044c1b827530b41b563eda17;p=php

Reorder zend_op_array fields for better data locality and packing
---

diff --git a/Zend/zend_compile.h b/Zend/zend_compile.h
index 1b0d0d9d32..e26faf89eb 100644
--- a/Zend/zend_compile.h
+++ b/Zend/zend_compile.h
@@ -373,23 +373,23 @@ struct _zend_op_array {
 	zend_arg_info *arg_info;
 	/* END of common elements */
 
-	uint32_t *refcount;
+	int cache_size;     /* number of run_time_cache_slots * sizeof(void*) */
+	int last_var;       /* number of CV variables */
+	uint32_t T;         /* numner of temporary variables */
+	uint32_t last;      /* number of opcodes */
 
-	uint32_t last;
 	zend_op *opcodes;
+	void **run_time_cache;
+	HashTable *static_variables;
+	zend_string **vars; /* names of CV variables */
 
-	int last_var;
-	uint32_t T;
-	zend_string **vars;
+	uint32_t *refcount;
 
 	int last_live_range;
 	int last_try_catch;
 	zend_live_range *live_range;
 	zend_try_catch_element *try_catch_array;
 
-	/* static variables support */
-	HashTable *static_variables;
-
 	zend_string *filename;
 	uint32_t line_start;
 	uint32_t line_end;
@@ -398,9 +398,6 @@ struct _zend_op_array {
 	int last_literal;
 	zval *literals;
 
-	int  cache_size;
-	void **run_time_cache;
-
 	void *reserved[ZEND_MAX_RESERVED_RESOURCES];
 };