OPTIM: vars: inline vars_prune() to avoid many calls

Many configs don't have variables and call it for no reason, and even
configs with variables don't necessarily have some in all scopes.

Author: wtarreau

include/haproxy/vars.h

@@ -35,7 +35,6 @@ struct arg;
 void vars_init_head(struct vars *vars, enum vars_scope scope);
 void var_accounting_diff(struct vars *vars, struct session *sess, struct stream *strm, int size);
 unsigned int var_clear(struct var *var, int force);
-void vars_prune(struct vars *vars, struct session *sess, struct stream *strm);
 void vars_prune_per_sess(struct vars *vars);
 int var_set(const struct var_desc *desc, struct sample *smp, uint flags);
 int var_unset(const struct var_desc *desc, struct sample *smp);
@@ -74,4 +73,19 @@ static inline void vars_rdunlock(struct vars *vars)
 		HA_RWLOCK_RDUNLOCK(VARS_LOCK, &vars->rwlock);
 }
 
+/* This function free all the memory used by all the variables
+ * in the list.
+ */
+static inline void vars_prune(struct vars *vars, struct session *sess, struct stream *strm)
+{
+	struct var *var, *tmp;
+	unsigned int size = 0;
+
+	list_for_each_entry_safe(var, tmp, &vars->head, l) {
+		size += var_clear(var, 1);
+	}
+
+	var_accounting_diff(vars, sess, strm, -size);
+}
+
 #endif

src/vars.c

@@ -195,21 +195,6 @@ unsigned int var_clear(struct var *var, int force)
 	return size;
 }
 
-/* This function free all the memory used by all the variables
- * in the list.
- */
-void vars_prune(struct vars *vars, struct session *sess, struct stream *strm)
-{
-	struct var *var, *tmp;
-	unsigned int size = 0;
-
-	list_for_each_entry_safe(var, tmp, &vars->head, l) {
-		size += var_clear(var, 1);
-	}
-
-	var_accounting_diff(vars, sess, strm, -size);
-}
-
 /* This function frees all the memory used by all the session variables in the
  * list starting at <vars>.
  */