diff --git a/src/misc2.c b/src/misc2.c
index 461d23e..69b9347 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -2057,6 +2057,13 @@
     {
 	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;
+
 	new_len = gap->ga_itemsize * (gap->ga_len + n);
 	pp = vim_realloc(gap->ga_data, new_len);
 	if (pp == NULL)
diff --git a/src/version.c b/src/version.c
index 4b380d2..30c0831 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1439,
+/**/
     1438,
 /**/
     1437,