DUK_REFZERO_CHECK() macro slow/fast variant

src-input/duk_api_stack.c

@@ -456,7 +456,7 @@ DUK_EXTERNAL void duk_set_top(duk_context *ctx, duk_idx_t idx) {
 			DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv);
 		} while (tv != tv_end);
 		thr->valstack_top = tv_end;
-		DUK_REFZERO_CHECK(thr);
+		DUK_REFZERO_CHECK_FAST(thr);
 #else  /* DUK_USE_REFERENCE_COUNTING */
 		duk_uidx_t count;
 		duk_tval *tv_end;
@@ -4448,7 +4448,7 @@ DUK_EXTERNAL void duk_pop_n(duk_context *ctx, duk_idx_t count) {
 		DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv);
 	}
 	thr->valstack_top = tv;
-	DUK_REFZERO_CHECK(thr);
+	DUK_REFZERO_CHECK_FAST(thr);
 #else
 	tv = thr->valstack_top;
 	while (count > 0) {

src-input/duk_heaphdr.h

@@ -518,11 +518,14 @@ struct duk_heaphdr_string {
 /* Free pending refzero entries; quick check to avoid call because often
  * the queue is empty.
  */
-#define DUK_REFZERO_CHECK(thr) do { \
+#define DUK_REFZERO_CHECK_FAST(thr) do { \
 		if ((thr)->heap->refzero_list != NULL) { \
 			duk_refzero_free_pending((thr)); \
 		} \
 	} while (0)
+#define DUK_REFZERO_CHECK_SLOW(thr) do { \
+		duk_refzero_free_pending((thr)); \
+	} while (0)
 
 /*
  *  Macros to set a duk_tval and update refcount of the target (decref the
@@ -767,7 +770,8 @@ struct duk_heaphdr_string {
 #define DUK_HOBJECT_INCREF_ALLOWNULL(thr,h)    do {} while (0) /* nop */
 #define DUK_HOBJECT_DECREF_ALLOWNULL(thr,h)    do {} while (0) /* nop */
 #define DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr,h)  do {} while (0) /* nop */
-#define DUK_REFZERO_CHECK(thr)                 do {} while (0) /* nop */
+#define DUK_REFZERO_CHECK_FAST(thr)            do {} while (0) /* nop */
+#define DUK_REFZERO_CHECK_SLOW(thr)            do {} while (0) /* nop */
 
 #define DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0(thr,tvptr_dst) do { \
 		duk_tval *tv__dst; tv__dst = (tvptr_dst); \
@@ -872,6 +876,7 @@ struct duk_heaphdr_string {
 	} while (0)
 
 #define DUK_TVAL_SET_UNDEFINED_UPDREF         DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0
+#define DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ    DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0
 #define DUK_TVAL_SET_UNUSED_UPDREF            DUK_TVAL_SET_UNUSED_UPDREF_ALT0
 #define DUK_TVAL_SET_NULL_UPDREF              DUK_TVAL_SET_NULL_UPDREF_ALT0
 #define DUK_TVAL_SET_BOOLEAN_UPDREF           DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0