diff --git a/src/channel.c b/src/channel.c
index 1fcb845..68adbc3 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -2399,7 +2399,7 @@
 	list_T	    *l = item->jq_value->vval.v_list;
 	typval_T    *tv;
 
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 	tv = &l->lv_first->li_tv;
 
 	if ((without_callback || !item->jq_no_callback)
@@ -5302,7 +5302,7 @@
 		    return FAIL;
 		}
 
-		range_list_materialize(item->vval.v_list);
+		CHECK_LIST_MATERIALIZE(item->vval.v_list);
 		li = item->vval.v_list->lv_first;
 		for (; li != NULL && n < 16; li = li->li_next, n++)
 		{
@@ -5729,7 +5729,7 @@
     listitem_T  *li;
     char_u	*s;
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     FOR_ALL_LIST_ITEMS(l, li)
     {
 	s = tv_get_string_chk(&li->li_tv);
diff --git a/src/eval.c b/src/eval.c
index b7003a8..2100d80 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1449,7 +1449,7 @@
 		else
 		{
 		    // Need a real list here.
-		    range_list_materialize(l);
+		    CHECK_LIST_MATERIALIZE(l);
 
 		    // No need to increment the refcount, it's already set for
 		    // the list being used in "tv".
diff --git a/src/evalbuffer.c b/src/evalbuffer.c
index f11727c..adbbca3 100644
--- a/src/evalbuffer.c
+++ b/src/evalbuffer.c
@@ -183,7 +183,7 @@
 		rettv->vval.v_number = 1;	// FAIL
 	    goto done;
 	}
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 	li = l->lv_first;
     }
     else
diff --git a/src/evalfunc.c b/src/evalfunc.c
index c499890..7579208 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -2275,7 +2275,7 @@
     {
 	listitem_T	*item;
 
-	range_list_materialize(list);
+	CHECK_LIST_MATERIALIZE(list);
 	item = list->lv_first;
 	do_cmdline(NULL, get_list_line, (void *)&item,
 		      DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT|DOCMD_KEYTYPED);
@@ -2820,7 +2820,7 @@
 			copy_tv(&arg_pt->pt_argv[i], &pt->pt_argv[i]);
 		    if (lv_len > 0)
 		    {
-			range_list_materialize(list);
+			CHECK_LIST_MATERIALIZE(list);
 			FOR_ALL_LIST_ITEMS(list, li)
 			    copy_tv(&li->li_tv, &pt->pt_argv[i++]);
 		    }
@@ -4912,7 +4912,7 @@
     l = argvars[0].vval.v_list;
     if (l != NULL)
     {
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 	item = l->lv_first;
 	if (argvars[2].v_type != VAR_UNKNOWN)
 	{
@@ -5018,7 +5018,7 @@
     msg_clr_eos();
 
     l = argvars[0].vval.v_list;
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     FOR_ALL_LIST_ITEMS(l, li)
     {
 	msg_puts((char *)tv_get_string(&li->li_tv));
@@ -5494,7 +5494,7 @@
     {
 	if ((l = argvars[0].vval.v_list) == NULL)
 	    goto theend;
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 	li = l->lv_first;
     }
     else
@@ -6279,7 +6279,7 @@
 	list_T *list = rettv->vval.v_list;
 
 	// Create a non-materialized list.  This is much more efficient and
-	// works with ":for".  If used otherwise range_list_materialize() must
+	// works with ":for".  If used otherwise CHECK_LIST_MATERIALIZE() must
 	// be called.
 	list->lv_first = &range_list_item;
 	list->lv_u.nonmat.lv_start = start;
@@ -6290,26 +6290,24 @@
 }
 
 /*
- * If "list" is a non-materialized list then materialize it now.
+ * Materialize "list".
+ * Do not call directly, use CHECK_LIST_MATERIALIZE()
  */
     void
 range_list_materialize(list_T *list)
 {
-    if (list->lv_first == &range_list_item)
-    {
-	varnumber_T start = list->lv_u.nonmat.lv_start;
-	varnumber_T end = list->lv_u.nonmat.lv_end;
-	int	    stride = list->lv_u.nonmat.lv_stride;
-	varnumber_T i;
+    varnumber_T start = list->lv_u.nonmat.lv_start;
+    varnumber_T end = list->lv_u.nonmat.lv_end;
+    int	    stride = list->lv_u.nonmat.lv_stride;
+    varnumber_T i;
 
-	list->lv_first = NULL;
-	list->lv_u.mat.lv_last = NULL;
-	list->lv_len = 0;
-	list->lv_u.mat.lv_idx_item = NULL;
-	for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
-	    if (list_append_number(list, (varnumber_T)i) == FAIL)
-		break;
-    }
+    list->lv_first = NULL;
+    list->lv_u.mat.lv_last = NULL;
+    list->lv_len = 0;
+    list->lv_u.mat.lv_idx_item = NULL;
+    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
+	if (list_append_number(list, (varnumber_T)i) == FAIL)
+	    break;
 }
 
     static void
@@ -7327,7 +7325,7 @@
 
 	if (ll != NULL)
 	{
-	    range_list_materialize(ll);
+	    CHECK_LIST_MATERIALIZE(ll);
 	    FOR_ALL_LIST_ITEMS(ll, li)
 	    {
 		strval = tv_get_string_buf_chk(&li->li_tv, buf);
diff --git a/src/evalvars.c b/src/evalvars.c
index 01aef1a..e747230 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -863,7 +863,7 @@
 	return FAIL;
     }
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     item = l->lv_first;
     while (*arg != ']')
     {
diff --git a/src/filepath.c b/src/filepath.c
index 81f90c3..27a26e5 100644
--- a/src/filepath.c
+++ b/src/filepath.c
@@ -1917,7 +1917,7 @@
 	list = argvars[0].vval.v_list;
 	if (list == NULL)
 	    return;
-	range_list_materialize(list);
+	CHECK_LIST_MATERIALIZE(list);
 	FOR_ALL_LIST_ITEMS(list, li)
 	    if (tv_get_string_chk(&li->li_tv) == NULL)
 		return;
diff --git a/src/highlight.c b/src/highlight.c
index 64f37a4..7a7e537 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -3743,7 +3743,7 @@
 	listitem_T	*li;
 	int		i;
 
-	range_list_materialize(pos_list);
+	CHECK_LIST_MATERIALIZE(pos_list);
 	for (i = 0, li = pos_list->lv_first; li != NULL && i < MAXPOSMATCH;
 							i++, li = li->li_next)
 	{
diff --git a/src/if_py_both.h b/src/if_py_both.h
index a13a5e3..9f563f0 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -785,7 +785,7 @@
 	    return NULL;
 	}
 
-	range_list_materialize(list);
+	CHECK_LIST_MATERIALIZE(list);
 	FOR_ALL_LIST_ITEMS(list, curr)
 	{
 	    if (!(newObj = VimToPython(&curr->li_tv, depth + 1, lookup_dict)))
@@ -2256,7 +2256,7 @@
 	return NULL;
     self->list = list;
     ++list->lv_refcount;
-    range_list_materialize(list);
+    CHECK_LIST_MATERIALIZE(list);
 
     pyll_add((PyObject *)(self), &self->ref, &lastlist);
 
@@ -2824,7 +2824,7 @@
 	return NULL;
     }
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     list_add_watch(l, &lii->lw);
     lii->lw.lw_item = l->lv_first;
     lii->list = l;
@@ -3021,7 +3021,7 @@
 		return NULL;
 	    }
 	    argslist = argstv.vval.v_list;
-	    range_list_materialize(argslist);
+	    CHECK_LIST_MATERIALIZE(argslist);
 
 	    argc = argslist->lv_len;
 	    if (argc != 0)
diff --git a/src/insexpand.c b/src/insexpand.c
index bd809b0..6963baf 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -2334,7 +2334,7 @@
     int		dir = compl_direction;
 
     // Go through the List with matches and add each of them.
-    range_list_materialize(list);
+    CHECK_LIST_MATERIALIZE(list);
     FOR_ALL_LIST_ITEMS(list, li)
     {
 	if (ins_compl_add_tv(&li->li_tv, dir) == OK)
@@ -2519,7 +2519,7 @@
     else
     {
 	what_flag = 0;
-	range_list_materialize(what_list);
+	CHECK_LIST_MATERIALIZE(what_list);
 	FOR_ALL_LIST_ITEMS(what_list, item)
 	{
 	    char_u *what = tv_get_string(&item->li_tv);
diff --git a/src/json.c b/src/json.c
index c1c6e85..ec3355e 100644
--- a/src/json.c
+++ b/src/json.c
@@ -265,7 +265,7 @@
 
 		    l->lv_copyID = copyID;
 		    ga_append(gap, '[');
-		    range_list_materialize(l);
+		    CHECK_LIST_MATERIALIZE(l);
 		    for (li = l->lv_first; li != NULL && !got_int; )
 		    {
 			if (json_encode_item(gap, &li->li_tv, copyID,
diff --git a/src/list.c b/src/list.c
index eb76cc6..6242e52 100644
--- a/src/list.c
+++ b/src/list.c
@@ -378,8 +378,8 @@
     if (l1 == NULL || l2 == NULL)
 	return FALSE;
 
-    range_list_materialize(l1);
-    range_list_materialize(l2);
+    CHECK_LIST_MATERIALIZE(l1);
+    CHECK_LIST_MATERIALIZE(l2);
 
     for (item1 = l1->lv_first, item2 = l2->lv_first;
 	    item1 != NULL && item2 != NULL;
@@ -411,7 +411,7 @@
     if (n < 0 || n >= l->lv_len)
 	return NULL;
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
 
     // When there is a cached index may start search from there.
     if (l->lv_u.mat.lv_idx_item != NULL)
@@ -541,7 +541,7 @@
 
     if (l == NULL)
 	return -1;
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     idx = 0;
     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
 	++idx;
@@ -556,7 +556,7 @@
     void
 list_append(list_T *l, listitem_T *item)
 {
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     if (l->lv_u.mat.lv_last == NULL)
     {
 	// empty list
@@ -706,7 +706,7 @@
     void
 list_insert(list_T *l, listitem_T *ni, listitem_T *item)
 {
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     if (item == NULL)
 	// Append new item at end of list.
 	list_append(l, ni);
@@ -741,8 +741,8 @@
     listitem_T	*item;
     int		todo = l2->lv_len;
 
-    range_list_materialize(l1);
-    range_list_materialize(l2);
+    CHECK_LIST_MATERIALIZE(l1);
+    CHECK_LIST_MATERIALIZE(l2);
 
     // We also quit the loop when we have inserted the original item count of
     // the list, avoid a hang when we extend a list with itself.
@@ -801,7 +801,7 @@
 	    orig->lv_copyID = copyID;
 	    orig->lv_copylist = copy;
 	}
-	range_list_materialize(orig);
+	CHECK_LIST_MATERIALIZE(orig);
 	for (item = orig->lv_first; item != NULL && !got_int;
 							 item = item->li_next)
 	{
@@ -842,7 +842,7 @@
 {
     listitem_T	*ip;
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
 
     // notify watchers
     for (ip = item; ip != NULL; ip = ip->li_next)
@@ -877,7 +877,7 @@
 	return NULL;
     ga_init2(&ga, (int)sizeof(char), 80);
     ga_append(&ga, '[');
-    range_list_materialize(tv->vval.v_list);
+    CHECK_LIST_MATERIALIZE(tv->vval.v_list);
     if (list_join(&ga, tv->vval.v_list, (char_u *)", ",
 				       FALSE, restore_copyID, copyID) == FAIL)
     {
@@ -915,7 +915,7 @@
     char_u	*s;
 
     // Stringify each item in the list.
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
     {
 	s = echo_string_core(&item->li_tv, &tofree, numbuf, copyID,
@@ -1116,7 +1116,7 @@
     int		ret = OK;
     char_u	*s;
 
-    range_list_materialize(list);
+    CHECK_LIST_MATERIALIZE(list);
     FOR_ALL_LIST_ITEMS(list, li)
     {
 	for (s = tv_get_string(&li->li_tv); *s != NUL; ++s)
@@ -1203,7 +1203,7 @@
     if (argvars[1].v_type != VAR_UNKNOWN)
 	utf8 = (int)tv_get_number_chk(&argvars[1], NULL);
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     ga_init2(&ga, 1, 80);
     if (has_mbyte || utf8)
     {
@@ -1496,7 +1496,7 @@
 									TRUE))
 	    goto theend;
 	rettv_list_set(rettv, l);
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 
 	len = list_len(l);
 	if (len <= 1)
@@ -1873,7 +1873,7 @@
 	    // set_vim_var_nr() doesn't set the type
 	    set_vim_var_type(VV_KEY, VAR_NUMBER);
 
-	    range_list_materialize(l);
+	    CHECK_LIST_MATERIALIZE(l);
 	    if (map && l->lv_lock == 0)
 		l->lv_lock = VAR_LOCKED;
 	    for (li = l->lv_first; li != NULL; li = nli)
@@ -2011,7 +2011,7 @@
 
 	if ((l = argvars[0].vval.v_list) != NULL)
 	{
-	    range_list_materialize(l);
+	    CHECK_LIST_MATERIALIZE(l);
 	    li = l->lv_first;
 	    if (argvars[2].v_type != VAR_UNKNOWN)
 	    {
diff --git a/src/macros.h b/src/macros.h
index 9a3d4e1..2ac705d 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -373,3 +373,9 @@
 # define ESTACK_CHECK_NOW
 # define CHECK_CURBUF
 #endif
+
+// Inline the condition for performance.
+#define CHECK_LIST_MATERIALIZE(l) if ((l)->lv_first == &range_list_item) range_list_materialize(l)
+
+// Inlined version of ga_grow().  Especially useful if "n" is a constant.
+#define GA_GROW(gap, n) (((gap)->ga_maxlen - (gap)->ga_len < n) ? ga_grow_inner((gap), (n)) : OK)
diff --git a/src/misc2.c b/src/misc2.c
index 50efde7..678b73c 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -2054,30 +2054,35 @@
     int
 ga_grow(garray_T *gap, int n)
 {
+    if (gap->ga_maxlen - gap->ga_len < n)
+	return ga_grow_inner(gap, n);
+    return OK;
+}
+
+    int
+ga_grow_inner(garray_T *gap, int n)
+{
     size_t	old_len;
     size_t	new_len;
     char_u	*pp;
 
-    if (gap->ga_maxlen - gap->ga_len < n)
-    {
-	if (n < gap->ga_growsize)
-	    n = gap->ga_growsize;
+    if (n < gap->ga_growsize)
+	n = gap->ga_growsize;
 
-	// A linear growth is very inefficient when the array grows big.  This
-	// is a compromise between allocating memory that won't be used and too
-	// many copy operations. A factor of 1.5 seems reasonable.
-	if (n < gap->ga_len / 2)
-	    n = gap->ga_len / 2;
+    // A linear growth is very inefficient when the array grows big.  This
+    // is a compromise between allocating memory that won't be used and too
+    // many copy operations. A factor of 1.5 seems reasonable.
+    if (n < gap->ga_len / 2)
+	n = gap->ga_len / 2;
 
-	new_len = gap->ga_itemsize * (gap->ga_len + n);
-	pp = vim_realloc(gap->ga_data, new_len);
-	if (pp == NULL)
-	    return FAIL;
-	old_len = gap->ga_itemsize * gap->ga_maxlen;
-	vim_memset(pp + old_len, 0, new_len - old_len);
-	gap->ga_maxlen = gap->ga_len + n;
-	gap->ga_data = pp;
-    }
+    new_len = gap->ga_itemsize * (gap->ga_len + n);
+    pp = vim_realloc(gap->ga_data, new_len);
+    if (pp == NULL)
+	return FAIL;
+    old_len = gap->ga_itemsize * gap->ga_maxlen;
+    vim_memset(pp + old_len, 0, new_len - old_len);
+    gap->ga_maxlen = gap->ga_len + n;
+    gap->ga_data = pp;
     return OK;
 }
 
diff --git a/src/popupmenu.c b/src/popupmenu.c
index d6993dc..2fe4cff 100644
--- a/src/popupmenu.c
+++ b/src/popupmenu.c
@@ -1318,7 +1318,7 @@
 	balloon_array = ALLOC_CLEAR_MULT(pumitem_T, list->lv_len);
 	if (balloon_array == NULL)
 	    return;
-	range_list_materialize(list);
+	CHECK_LIST_MATERIALIZE(list);
 	for (idx = 0, li = list->lv_first; li != NULL; li = li->li_next, ++idx)
 	{
 	    char_u *text = tv_get_string_chk(&li->li_tv);
diff --git a/src/popupwin.c b/src/popupwin.c
index a244c32..4ee097a 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -98,7 +98,7 @@
 		array[i] = 1;
 	    if (list != NULL)
 	    {
-		range_list_materialize(list);
+		CHECK_LIST_MATERIALIZE(list);
 		for (i = 0, li = list->lv_first; i < 4 && i < list->lv_len;
 							 ++i, li = li->li_next)
 		{
@@ -516,7 +516,7 @@
 	int	    mincol;
 	int	    maxcol;
 
-	range_list_materialize(l);
+	CHECK_LIST_MATERIALIZE(l);
 	li = l->lv_first;
 	if (l->lv_len == 3)
 	{
@@ -756,7 +756,7 @@
 	    listitem_T	*li;
 	    int		i;
 
-	    range_list_materialize(list);
+	    CHECK_LIST_MATERIALIZE(list);
 	    for (i = 0, li = list->lv_first; i < 4 && i < list->lv_len;
 						     ++i, li = li->li_next)
 	    {
@@ -790,7 +790,7 @@
 
 	    if (list != NULL)
 	    {
-		range_list_materialize(list);
+		CHECK_LIST_MATERIALIZE(list);
 		for (i = 0, li = list->lv_first; i < 8 && i < list->lv_len;
 							 ++i, li = li->li_next)
 		{
@@ -845,7 +845,7 @@
 		    break;
 		}
 		else
-		    range_list_materialize(li->li_tv.vval.v_list);
+		    CHECK_LIST_MATERIALIZE(li->li_tv.vval.v_list);
 	    }
 	}
 	if (ok)
diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index 6c047f3..592c7d1 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -59,6 +59,7 @@
 void ga_init(garray_T *gap);
 void ga_init2(garray_T *gap, int itemsize, int growsize);
 int ga_grow(garray_T *gap, int n);
+int ga_grow_inner(garray_T *gap, int n);
 char_u *ga_concat_strings(garray_T *gap, char *sep);
 void ga_add_string(garray_T *gap, char_u *p);
 void ga_concat(garray_T *gap, char_u *s);
diff --git a/src/userfunc.c b/src/userfunc.c
index b33aee7..5a64ccb 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -1718,7 +1718,7 @@
     int		argc = 0;
     int		r = 0;
 
-    range_list_materialize(l);
+    CHECK_LIST_MATERIALIZE(l);
     FOR_ALL_LIST_ITEMS(l, item)
     {
 	if (argc == MAX_FUNC_ARGS - (partial == NULL ? 0 : partial->pt_argc))