diff --git a/src/bin/Makefile.am b/src/bin/Makefile.am
--- a/src/bin/Makefile.am
+++ b/src/bin/Makefile.am
@@ -86,6 +86,7 @@
 textblock_intl.c \
 textblock_auto_align.c \
 textblock_text_append.c \
+textblock_text_fill_format.c \
 rect_blend.c \
 rect_blend_pow2.c \
 rect_solid.c \
diff --git a/src/bin/meson.build b/src/bin/meson.build
--- a/src/bin/meson.build
+++ b/src/bin/meson.build
@@ -76,6 +76,7 @@
 	'textblock_intl.c',
 	'textblock_auto_align.c',
 	'textblock_text_append.c',
+	'textblock_text_fill_format.c',
 	'rect_blend.c',
 	'rect_blend_pow2.c',
 	'rect_solid.c',
diff --git a/src/bin/tests.h b/src/bin/tests.h
--- a/src/bin/tests.h
+++ b/src/bin/tests.h
@@ -69,6 +69,7 @@
 #include "textblock_intl.c"
 #include "textblock_auto_align.c"
 #include "textblock_text_append.c"
+#include "textblock_text_fill_format.c"
 #include "rect_blend.c"
 #include "rect_blend_pow2.c"
 #include "rect_solid.c"
diff --git a/src/bin/textblock_text_fill_format.c b/src/bin/textblock_text_fill_format.c
new file mode 100644
--- /dev/null
+++ b/src/bin/textblock_text_fill_format.c
@@ -0,0 +1,103 @@
+#undef FNAME
+#undef NAME
+#undef ICON
+
+/* metadata */
+#define FNAME textblock_text_fill_format
+#define NAME "Textblock text_fill_format"
+#define ICON "text.png"
+
+#ifndef PROTO
+# ifndef UI
+#  include "main.h"
+
+/* standard var */
+static int done = 0;
+
+/* private data */
+static Evas_Object *o_text;
+static int sizes[] = {500, 600};
+Evas_Coord ll, rr, tt, bb;
+
+/* setup */
+static void _setup(void)
+{
+   Evas_Object *o;
+   Evas_Textblock_Style *st;
+
+   o = evas_object_textblock_add(evas);
+   o_text = o;
+   st = evas_textblock_style_new();
+   evas_textblock_style_set (st, "DEFAULT='font=Sans font_size=10 color=#000000 wrap=word align=left outline_color=#000 shadow_color=#fff8 shadow_color=#0002 glow2_color=#fe87 glow_color=#f214 underline_color=#00f linesize=40'");
+   evas_object_textblock_style_set(o, st);
+   evas_object_textblock_clear(o);
+   evas_object_textblock_text_markup_set(o, "This test resize text block and keep style (style parsed only once)");
+
+   efl_gfx_entity_position_set(o, EINA_POSITION2D(0, 0)); \
+   efl_gfx_entity_size_set(o, EINA_SIZE2D(win_w, win_h)); \
+   efl_gfx_entity_visible_set(o, EINA_TRUE);
+
+   evas_textblock_style_free(st);
+
+   done = 0;
+}
+
+/* cleanup */
+static void _cleanup(void)
+{
+   efl_del(o_text);
+   o_text = NULL;
+}
+
+/* loop - do things */
+static void _loop(double t, int f)
+{
+   for (int i = 0; i < 10000; i++)
+     {
+        evas_object_resize(o_text,sizes[i%2],sizes[i%2]);
+        evas_object_textblock_style_insets_get((Efl_Canvas_Object*) o_text, &ll, &rr, &tt, &bb);
+     }
+   FPS_STD(NAME);
+}
+
+/* prepend special key handlers if interactive (before STD) */
+static void _key(const char *key)
+{
+   KEY_STD;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+/* template stuff - ignore */
+# endif
+#endif
+
+#ifdef UI
+_ui_menu_item_add(ICON, NAME, FNAME);
+#endif
+
+#ifdef PROTO
+void FNAME(void);
+#endif
+
+#ifndef PROTO
+# ifndef UI
+void FNAME(void)
+{
+   ui_func_set(_key, _loop);
+   _setup();
+}
+# endif
+#endif
+#undef FNAME
+#undef NAME
+#undef ICON