Introduce a zval-specific cache - 5-15% speed improvement

Zend/zend.h

@@ -284,10 +284,6 @@ END_EXTERN_C()
 
 #define INIT_ZVAL(z) z = zval_used_for_init;
 
-#define ALLOC_ZVAL(z) (z) = (zval *) emalloc(sizeof(zval))
-
-#define FREE_ZVAL(z) efree(z)
-
 #define ALLOC_INIT_ZVAL(zp)						\
 	ALLOC_ZVAL(zp);		\
 	INIT_ZVAL(*zp);

Zend/zend_API.h

@@ -23,6 +23,7 @@
 
 #include "modules.h"
 #include "zend_list.h"
+#include "zend_zval_alloc.h"
 
 
 #define ZEND_NAMED_FUNCTION(name) void name(INTERNAL_FUNCTION_PARAMETERS)

Zend/zend_alloc.c

@@ -23,6 +23,7 @@
 #include "zend.h"
 #include "zend_alloc.h"
 #include "zend_globals.h"
+#include "zend_zval_alloc.h"
 #ifdef HAVE_SIGNAL_H
 # include <signal.h>
 #endif
@@ -31,7 +32,7 @@
 #endif
 
 #ifndef ZTS
-static zend_alloc_globals alloc_globals;
+zend_alloc_globals alloc_globals;
 #endif
 
 
@@ -321,6 +322,10 @@ ZEND_API void start_memory_manager(ALS_D)
 	AG(memory_exhausted)=0;
 #endif
 
+#if ZEND_DEBUG
+	AG(zval_list_head) = NULL;
+#endif
+
 	memset(AG(cache_count),0,MAX_CACHED_MEMORY*sizeof(unsigned char));
 }
 
@@ -330,9 +335,21 @@ ZEND_API void shutdown_memory_manager(int silent, int clean_cache)
 	zend_mem_header *p, *t;
 #if ZEND_DEBUG
 	int had_leaks=0;
+#else
+	zend_zval_list_entry *zval_list_entry, *next_zval_list_entry;
 #endif
 	ALS_FETCH();
 
+#if !ZEND_DEBUG
+	zval_list_entry = AG(zval_list_head);
+	while (zval_list_entry) {
+		next_zval_list_entry = zval_list_entry->next;
+		efree(zval_list_entry);
+		zval_list_entry = next_zval_list_entry;
+	}
+	AG(zval_list_head) = NULL;
+#endif
+
 	p=AG(head);
 	t=AG(head);
 	while (t) {

Zend/zend_compile.c

@@ -25,6 +25,7 @@
 #include "zend_API.h"
 #include "zend_variables.h"
 #include "zend_operators.h"
+#include "zend_zval_alloc.h"
 
 
 ZEND_API zend_op_array *(*zend_compile_files)(int mark_as_ref CLS_DC, int file_count, ...);

Zend/zend_execute.c

@@ -30,6 +30,7 @@
 #include "zend_operators.h"
 #include "zend_constants.h"
 #include "zend_extensions.h"
+#include "zend_zval_alloc.h"
 
 #if defined(HAVE_ALLOCA) && defined(HAVE_ALLOCA_H)
 # include <alloca.h>

Zend/zend_globals.h

@@ -179,6 +179,9 @@ struct _zend_alloc_globals {
 	zend_mem_header *phead;		/* persistent list */
 	void *cache[MAX_CACHED_MEMORY][MAX_CACHED_ENTRIES];
 	unsigned char cache_count[MAX_CACHED_MEMORY];
+#if !ZEND_DEBUG
+	void *zval_list_head;
+#endif
 
 #if MEMORY_LIMIT
 	unsigned int memory_limit;

Zend/zend_operators.c

@@ -29,6 +29,7 @@
 #include "zend_variables.h"
 #include "zend_globals.h"
 #include "zend_list.h"
+#include "zend_zval_alloc.h"
 
 #if WITH_BCMATH
 #include "functions/number.h"