diff --git a/lv_objx/lv_bar.c b/lv_objx/lv_bar.c
index 4efe3fdb78..1e938995c3 100644
--- a/lv_objx/lv_bar.c
+++ b/lv_objx/lv_bar.c
@@ -110,6 +110,8 @@ lv_obj_t * lv_bar_create(lv_obj_t * par, lv_obj_t * copy)
 void lv_bar_set_value(lv_obj_t * bar, int16_t value)
 {
 	lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
+	if(ext->cur_value == value) return;
+
 	ext->cur_value = value > ext->max_value ? ext->max_value : value;
     ext->cur_value = ext->cur_value < ext->min_value ? ext->min_value : ext->cur_value;
 	lv_obj_invalidate(bar);
@@ -125,6 +127,8 @@ void lv_bar_set_value(lv_obj_t * bar, int16_t value)
 void lv_bar_set_value_anim(lv_obj_t * bar, int16_t value, uint16_t anim_time)
 {
     lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
+	if(ext->cur_value == value) return;
+
     int16_t new_value;
     new_value = value > ext->max_value ? ext->max_value : value;
     new_value = new_value < ext->min_value ? ext->min_value : new_value;
@@ -157,6 +161,8 @@ void lv_bar_set_value_anim(lv_obj_t * bar, int16_t value, uint16_t anim_time)
 void lv_bar_set_range(lv_obj_t * bar, int16_t min, int16_t max)
 {
 	lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
+	if(ext->min_value == min && ext->max_value == max) return;
+
 	ext->max_value = max;
 	ext->min_value = min;
 	if(ext->cur_value > max) {
diff --git a/lv_objx/lv_chart.c b/lv_objx/lv_chart.c
index e2b302de7f..c424928580 100644
--- a/lv_objx/lv_chart.c
+++ b/lv_objx/lv_chart.c
@@ -159,6 +159,7 @@ lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color)
 void lv_chart_set_div_line_count(lv_obj_t * chart, uint8_t hdiv, uint8_t vdiv)
 {
 	lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+	if(ext->hdiv_cnt == hdiv && ext->vdiv_cnt == vdiv) return;
 
 	ext->hdiv_cnt = hdiv;
 	ext->vdiv_cnt = vdiv;
@@ -175,6 +176,7 @@ void lv_chart_set_div_line_count(lv_obj_t * chart, uint8_t hdiv, uint8_t vdiv)
 void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coord_t ymax)
 {
 	lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+	if(ext->ymin == ymin && ext->ymax == ymax) return;
 
 	ext->ymin = ymin;
 	ext->ymax = ymax;
@@ -190,6 +192,8 @@ void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coord_t ymax)
 void lv_chart_set_type(lv_obj_t * chart, lv_chart_type_t type)
 {
 	lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+	if(ext->type == type) return;
+
 	ext->type = type;
 
 	lv_chart_refresh(chart);
@@ -203,6 +207,8 @@ void lv_chart_set_type(lv_obj_t * chart, lv_chart_type_t type)
 void lv_chart_set_point_count(lv_obj_t * chart, uint16_t point_cnt)
 {
 	lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+	if(ext->point_cnt == point_cnt) return;
+
 	lv_chart_series_t *ser;
 	uint16_t point_cnt_old = ext->point_cnt;
 	uint16_t i;
@@ -233,6 +239,8 @@ void lv_chart_set_point_count(lv_obj_t * chart, uint16_t point_cnt)
 void lv_chart_set_series_opa(lv_obj_t * chart, lv_opa_t opa)
 {
     lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+    if(ext->series.opa == opa) return;
+
     ext->series.opa = opa;
     lv_obj_invalidate(chart);
 }
@@ -245,6 +253,8 @@ void lv_chart_set_series_opa(lv_obj_t * chart, lv_opa_t opa)
 void lv_chart_set_series_width(lv_obj_t * chart, lv_coord_t width)
 {
     lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+    if(ext->series.width == width) return;
+
     ext->series.width = width;
     lv_obj_invalidate(chart);
 }
@@ -256,7 +266,10 @@ void lv_chart_set_series_width(lv_obj_t * chart, lv_coord_t width)
 void lv_chart_set_series_darking(lv_obj_t * chart, lv_opa_t dark_eff)
 {
     lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
+    if(ext->series.dark == dark_eff) return;
+
     ext->series.dark = dark_eff;
+    lv_obj_invalidate(chart);
 }
 
 /**
diff --git a/lv_objx/lv_cont.c b/lv_objx/lv_cont.c
index 7a3e09be8e..9d8cc01114 100644
--- a/lv_objx/lv_cont.c
+++ b/lv_objx/lv_cont.c
@@ -113,6 +113,8 @@ lv_obj_t * lv_cont_create(lv_obj_t * par, lv_obj_t * copy)
 void lv_cont_set_layout(lv_obj_t * cont, lv_layout_t layout)
 {
 	lv_cont_ext_t * ext = lv_obj_get_ext_attr(cont);
+	if(ext->layout == layout) return;
+
 	ext->layout = layout;
 
 	/*Send a signal to refresh the layout*/
@@ -131,6 +133,8 @@ void lv_cont_set_fit(lv_obj_t * cont, bool hor_en, bool ver_en)
 {
 	lv_obj_invalidate(cont);
 	lv_cont_ext_t * ext = lv_obj_get_ext_attr(cont);
+	if(ext->hor_fit == hor_en && ext->ver_fit == ver_en) return;
+
 	ext->hor_fit = hor_en == false ? 0 : 1;
 	ext->ver_fit = ver_en == false ? 0 : 1;
 
diff --git a/lv_objx/lv_ddlist.c b/lv_objx/lv_ddlist.c
index 0e3b90968f..314fcdb2a4 100644
--- a/lv_objx/lv_ddlist.c
+++ b/lv_objx/lv_ddlist.c
@@ -172,6 +172,7 @@ void lv_ddlist_set_options(lv_obj_t * ddlist, const char * options)
 void lv_ddlist_set_selected(lv_obj_t * ddlist, uint16_t sel_opt)
 {
     lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
+    if(ext->sel_opt_id == sel_opt) return;
 
     ext->sel_opt_id = sel_opt < ext->option_cnt ? sel_opt : ext->option_cnt - 1;
 
@@ -203,6 +204,8 @@ void lv_ddlist_set_action(lv_obj_t * ddlist, lv_action_t action)
 void lv_ddlist_set_fix_height(lv_obj_t * ddlist, lv_coord_t h)
 {
     lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
+    if(ext->fix_height == h) return;
+
     ext->fix_height = h;
 
     lv_ddlist_refr_size(ddlist, false);
@@ -218,7 +221,6 @@ void lv_ddlist_set_hor_fit(lv_obj_t * ddlist, bool fit_en)
     lv_cont_set_fit(ddlist, fit_en, lv_cont_get_ver_fit(ddlist));
     lv_page_set_scrl_fit(ddlist, fit_en, lv_page_get_scrl_fit_ver(ddlist));
 
-
     lv_ddlist_refr_size(ddlist, false);
 }
 
diff --git a/lv_objx/lv_gauge.c b/lv_objx/lv_gauge.c
index 4fbb580c5f..2242d32a5e 100644
--- a/lv_objx/lv_gauge.c
+++ b/lv_objx/lv_gauge.c
@@ -127,20 +127,24 @@ lv_obj_t * lv_gauge_create(lv_obj_t * par, lv_obj_t * copy)
 void lv_gauge_set_needle_count(lv_obj_t * gauge, uint8_t needle_cnt, const lv_color_t * colors)
 {
     lv_gauge_ext_t * ext = lv_obj_get_ext_attr(gauge);
-    if(ext->values != NULL) {
-        lv_mem_free(ext->values);
-        ext->values = NULL;
+
+    if(ext->needle_count != needle_cnt) {
+		if(ext->values != NULL) {
+			lv_mem_free(ext->values);
+			ext->values = NULL;
+		}
+
+		ext->values = lv_mem_realloc(ext->values, needle_cnt * sizeof(int16_t));
+
+		int16_t min = lv_gauge_get_min_value(gauge);
+		uint8_t n;
+		for(n = ext->needle_count; n < needle_cnt; n++) {
+			ext->values[n] = min;
+		}
+
+		ext->needle_count = needle_cnt;
     }
 
-    ext->values = lv_mem_realloc(ext->values, needle_cnt * sizeof(int16_t));
-
-    int16_t min = lv_gauge_get_min_value(gauge);
-    uint8_t n;
-    for(n = ext->needle_count; n < needle_cnt; n++) {
-        ext->values[n] = min;
-    }
-
-    ext->needle_count = needle_cnt;
     ext->needle_colors = colors;
     lv_obj_invalidate(gauge);
 }
@@ -156,6 +160,8 @@ void lv_gauge_set_value(lv_obj_t * gauge, uint8_t needle_id, int16_t value)
     lv_gauge_ext_t * ext = lv_obj_get_ext_attr(gauge);
 
     if(needle_id >= ext->needle_count) return;
+    if(ext->values[needle_id] == value) return;
+
 
     int16_t min = lv_gauge_get_min_value(gauge);
     int16_t max = lv_gauge_get_max_value(gauge);
@@ -183,6 +189,7 @@ void lv_gauge_set_scale(lv_obj_t * gauge, uint16_t angle, uint8_t line_cnt, uint
 
     lv_gauge_ext_t * ext = lv_obj_get_ext_attr(gauge);
     ext->label_count = label_cnt;
+    lv_obj_invalidate(gauge);
 }
 
 /*=====================
diff --git a/lv_objx/lv_kb.c b/lv_objx/lv_kb.c
index d7254954fa..a9b7eac1be 100644
--- a/lv_objx/lv_kb.c
+++ b/lv_objx/lv_kb.c
@@ -146,6 +146,7 @@ void lv_kb_set_ta(lv_obj_t * kb, lv_obj_t * ta)
     lv_kb_ext_t * ext = lv_obj_get_ext_attr(kb);
     lv_cursor_type_t cur_type;
 
+    /*Hide the cursor of the old Text area if cursor management is enabled*/
     if(ext->ta && ext->cursor_mng) {
         cur_type = lv_ta_get_cursor_type(ext->ta);
         lv_ta_set_cursor_type(ext->ta,  cur_type | LV_CURSOR_HIDDEN);
@@ -153,6 +154,7 @@ void lv_kb_set_ta(lv_obj_t * kb, lv_obj_t * ta)
 
     ext->ta = ta;
 
+    /*Show the cursor of the new Text area if cursor management is enabled*/
     if(ext->ta && ext->cursor_mng) {
         cur_type = lv_ta_get_cursor_type(ext->ta);
         lv_ta_set_cursor_type(ext->ta,  cur_type & (~LV_CURSOR_HIDDEN));
@@ -167,6 +169,8 @@ void lv_kb_set_ta(lv_obj_t * kb, lv_obj_t * ta)
 void lv_kb_set_mode(lv_obj_t * kb, lv_kb_mode_t mode)
 {
     lv_kb_ext_t * ext = lv_obj_get_ext_attr(kb);
+    if(ext->mode == mode) return;
+
     ext->mode = mode;
     if(mode == LV_KB_MODE_TEXT) lv_btnm_set_map(kb, kb_map_lc);
     else if(mode == LV_KB_MODE_NUM) lv_btnm_set_map(kb, kb_map_num);
@@ -181,6 +185,8 @@ void lv_kb_set_mode(lv_obj_t * kb, lv_kb_mode_t mode)
 void lv_kb_set_cursor_manage(lv_obj_t * kb, bool en)
 {
     lv_kb_ext_t * ext = lv_obj_get_ext_attr(kb);
+    if(ext->cursor_mng == en) return;
+
     ext->cursor_mng = en == false? 0 : 1;
 
     if(ext->ta) {
diff --git a/lv_objx/lv_label.c b/lv_objx/lv_label.c
index f6f40fd09b..3463098138 100644
--- a/lv_objx/lv_label.c
+++ b/lv_objx/lv_label.c
@@ -253,6 +253,7 @@ void lv_label_set_long_mode(lv_obj_t * label, lv_label_long_mode_t long_mode)
 void lv_label_set_align(lv_obj_t *label, lv_label_align_t align)
 {
     lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
+    if(ext->align == align) return;
 
     ext->align = align;
 
@@ -268,6 +269,7 @@ void lv_label_set_align(lv_obj_t *label, lv_label_align_t align)
 void lv_label_set_recolor(lv_obj_t * label, bool recolor_en)
 {
     lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
+    if(ext->recolor == recolor_en) return;
 
     ext->recolor = recolor_en == false ? 0 : 1;
 
@@ -282,6 +284,8 @@ void lv_label_set_recolor(lv_obj_t * label, bool recolor_en)
 void lv_label_set_no_break(lv_obj_t * label, bool no_break_en)
 {
     lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
+    if(ext->no_break == no_break_en) return;
+
     ext->no_break = no_break_en == false ? 0 : 1;
 
     lv_label_refr_text(label);
@@ -295,6 +299,8 @@ void lv_label_set_no_break(lv_obj_t * label, bool no_break_en)
 void lv_label_set_body_draw(lv_obj_t *label, bool body_en)
 {
     lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
+    if(ext->body_draw == body_en) return;
+
     ext->body_draw = body_en == false ? 0 : 1;
 
     lv_obj_refresh_ext_size(label);
@@ -310,6 +316,8 @@ void lv_label_set_body_draw(lv_obj_t *label, bool body_en)
 void lv_label_set_anim_speed(lv_obj_t *label, uint16_t anim_speed)
 {
     lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
+    if(ext->anim_speed == anim_speed) return;
+
     ext->anim_speed = anim_speed;
 
     if(ext->long_mode == LV_LABEL_LONG_ROLL || ext->long_mode == LV_LABEL_LONG_SCROLL) {
diff --git a/lv_objx/lv_led.c b/lv_objx/lv_led.c
index e14630c4ba..4a11607df4 100644
--- a/lv_objx/lv_led.c
+++ b/lv_objx/lv_led.c
@@ -104,6 +104,8 @@ void lv_led_set_bright(lv_obj_t * led, uint8_t bright)
 {
 	/*Set the brightness*/
 	lv_led_ext_t * ext = lv_obj_get_ext_attr(led);
+	if(ext->bright == bright) return;
+
 	ext->bright = bright;
 
 	/*Invalidate the object there fore it will be redrawn*/
diff --git a/lv_objx/lv_line.c b/lv_objx/lv_line.c
index d3de7b5785..b6e71d35e6 100644
--- a/lv_objx/lv_line.c
+++ b/lv_objx/lv_line.c
@@ -129,6 +129,7 @@ void lv_line_set_points(lv_obj_t * line, const lv_point_t * point_a, uint16_t po
 void lv_line_set_auto_size(lv_obj_t * line, bool autosize_en)
 {
 	lv_line_ext_t * ext = lv_obj_get_ext_attr(line);
+	if(ext->auto_size == autosize_en) return;
 
 	ext->auto_size = autosize_en == false ? 0 : 1;
 
@@ -146,6 +147,7 @@ void lv_line_set_auto_size(lv_obj_t * line, bool autosize_en)
 void lv_line_set_y_invert(lv_obj_t * line, bool yinv_en)
 {
 	lv_line_ext_t * ext = lv_obj_get_ext_attr(line);
+	if(ext->y_inv == yinv_en) return;
 
 	ext->y_inv = yinv_en == false ? 0 : 1;
 
diff --git a/lv_objx/lv_list.c b/lv_objx/lv_list.c
index 9da62addad..f272efd227 100644
--- a/lv_objx/lv_list.c
+++ b/lv_objx/lv_list.c
@@ -211,6 +211,8 @@ void lv_list_set_anim_time(lv_obj_t *list, uint16_t anim_time)
 #if USE_LV_ANIMATION == 0
     anim_time = 0;
 #endif
+
+    if(ext->anim_time == anim_time) return;
     ext->anim_time = anim_time;
 }
 
diff --git a/lv_objx/lv_lmeter.c b/lv_objx/lv_lmeter.c
index d9d0a1a845..6bda4c0506 100644
--- a/lv_objx/lv_lmeter.c
+++ b/lv_objx/lv_lmeter.c
@@ -112,8 +112,10 @@ lv_obj_t * lv_lmeter_create(lv_obj_t * par, lv_obj_t * copy)
  */
 void lv_lmeter_set_value(lv_obj_t *lmeter, int16_t value)
 {
-    lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
-    ext->cur_value = value > ext->max_value ? ext->max_value : value;
+	lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
+    if(ext->cur_value == value) return;
+
+	ext->cur_value = value > ext->max_value ? ext->max_value : value;
     ext->cur_value = ext->cur_value < ext->min_value ? ext->min_value : ext->cur_value;
     lv_obj_invalidate(lmeter);
 }
@@ -127,6 +129,8 @@ void lv_lmeter_set_value(lv_obj_t *lmeter, int16_t value)
 void lv_lmeter_set_range(lv_obj_t *lmeter, int16_t min, int16_t max)
 {
     lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
+    if(ext->min_value == min && ext->max_value == max) return;
+
     ext->max_value = max;
     ext->min_value = min;
     if(ext->cur_value > max) {
@@ -149,6 +153,8 @@ void lv_lmeter_set_range(lv_obj_t *lmeter, int16_t min, int16_t max)
 void lv_lmeter_set_scale(lv_obj_t * lmeter, uint16_t angle, uint8_t line_cnt)
 {
     lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
+    if(ext->scale_angle == angle && ext->line_cnt == line_cnt) return;
+
     ext->scale_angle = angle;
     ext->line_cnt = line_cnt;
 
diff --git a/lv_objx/lv_mbox.c b/lv_objx/lv_mbox.c
index 4c3e57f40d..5156a3a6d7 100644
--- a/lv_objx/lv_mbox.c
+++ b/lv_objx/lv_mbox.c
@@ -191,6 +191,7 @@ void lv_mbox_set_anim_time(lv_obj_t * mbox, uint16_t anim_time)
 #if USE_LV_ANIMATION == 0
     anim_time = 0;
 #endif
+
     ext->anim_time = anim_time;
 }
 
diff --git a/lv_objx/lv_page.c b/lv_objx/lv_page.c
index 024eea3045..2f0c0fcc94 100644
--- a/lv_objx/lv_page.c
+++ b/lv_objx/lv_page.c
@@ -170,6 +170,8 @@ void lv_page_set_pr_action(lv_obj_t * page, lv_action_t pr_action)
 void lv_page_set_sb_mode(lv_obj_t * page, lv_sb_mode_t sb_mode)
 {
     lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
+    if(ext->sb.mode == sb_mode) return;
+
     ext->sb.mode = sb_mode;
     ext->sb.hor_draw = 0;
     ext->sb.ver_draw = 0;
diff --git a/lv_objx/lv_roller.c b/lv_objx/lv_roller.c
index 361d4e389a..de9e33c17d 100644
--- a/lv_objx/lv_roller.c
+++ b/lv_objx/lv_roller.c
@@ -125,6 +125,9 @@ void lv_roller_set_selected(lv_obj_t *roller, uint16_t sel_opt, bool anim_en)
 #if USE_LV_ANIMATION == 0
     anim_en = false;
 #endif
+
+    if(lv_roller_get_selected(roller) == sel_opt) return;
+
     lv_ddlist_set_selected(roller, sel_opt);
     refr_position(roller, anim_en);
 }
diff --git a/lv_objx/lv_slider.c b/lv_objx/lv_slider.c
index e115e54e04..ed188be25e 100644
--- a/lv_objx/lv_slider.c
+++ b/lv_objx/lv_slider.c
@@ -127,6 +127,8 @@ void lv_slider_set_action(lv_obj_t * slider, lv_action_t action)
 void lv_slider_set_knob_in(lv_obj_t * slider, bool in)
 {
     lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
+    if(ext->knob_in == in) return;
+
     ext->knob_in = in == false ? 0 : 1;
     lv_obj_invalidate(slider);
 }
diff --git a/lv_objx/lv_sw.c b/lv_objx/lv_sw.c
index 4b667bd093..79495438ed 100644
--- a/lv_objx/lv_sw.c
+++ b/lv_objx/lv_sw.c
@@ -112,6 +112,8 @@ lv_obj_t * lv_sw_create(lv_obj_t * par, lv_obj_t * copy)
  */
 void lv_sw_on(lv_obj_t *sw)
 {
+	if(lv_sw_get_state(sw)) return;		/*Do nothing is already turned on*/
+
     lv_sw_ext_t *ext = lv_obj_get_ext_attr(sw);
     lv_slider_set_value(sw, 1);
     lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB,ext->style_knob_on);
@@ -123,6 +125,8 @@ void lv_sw_on(lv_obj_t *sw)
  */
 void lv_sw_off(lv_obj_t *sw)
 {
+	if(!lv_sw_get_state(sw)) return;	/*Do nothing is already turned off*/
+
     lv_sw_ext_t *ext = lv_obj_get_ext_attr(sw);
     lv_slider_set_value(sw, 0);
     lv_slider_set_style(sw, LV_SLIDER_STYLE_KNOB,ext->style_knob_off);
diff --git a/lv_objx/lv_ta.c b/lv_objx/lv_ta.c
index 86c5ce199d..f3cca7828e 100644
--- a/lv_objx/lv_ta.c
+++ b/lv_objx/lv_ta.c
@@ -347,6 +347,8 @@ void lv_ta_set_text(lv_obj_t * ta, const char * txt)
 void lv_ta_set_cursor_pos(lv_obj_t * ta, int16_t pos)
 {
 	lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
+	if(ext->cursor.pos == pos) return;
+
     uint16_t len = lv_txt_get_length(lv_label_get_text(ext->label));
 
 	if(pos < 0) pos = len + pos;
@@ -419,6 +421,8 @@ void lv_ta_set_cursor_pos(lv_obj_t * ta, int16_t pos)
 void lv_ta_set_cursor_type(lv_obj_t * ta, lv_cursor_type_t cur_type)
 {
     lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
+    if(ext->cursor.type == cur_type) return;
+
     ext->cursor.type = cur_type;
     lv_obj_invalidate(ta);
 }
@@ -431,6 +435,7 @@ void lv_ta_set_cursor_type(lv_obj_t * ta, lv_cursor_type_t cur_type)
 void lv_ta_set_pwd_mode(lv_obj_t * ta, bool pwd_en)
 {
     lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
+    if(ext->pwd_mode == pwd_en) return;
 
     /*Pwd mode is now enabled*/
     if(ext->pwd_mode == 0 && pwd_en != false) {
@@ -464,8 +469,10 @@ void lv_ta_set_pwd_mode(lv_obj_t * ta, bool pwd_en)
  */
 void lv_ta_set_one_line(lv_obj_t * ta, bool en)
 {
+    lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
+	if(ext->one_line == en) return;
+
     if(en != false) {
-        lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
         lv_style_t * style_ta = lv_obj_get_style(ta);
         lv_style_t * style_scrl = lv_obj_get_style(lv_page_get_scrl(ta));
         lv_style_t * style_label = lv_obj_get_style(ext->label);
@@ -478,7 +485,6 @@ void lv_ta_set_one_line(lv_obj_t * ta, bool en)
         lv_label_set_no_break(ext->label, true);
         lv_obj_set_pos(lv_page_get_scrl(ta), style_ta->body.padding.hor, style_ta->body.padding.ver);
     } else {
-        lv_ta_ext_t * ext = lv_obj_get_ext_attr(ta);
         lv_style_t * style_ta = lv_obj_get_style(ta);
 
         ext->one_line = 0;
diff --git a/lv_objx/lv_tabview.c b/lv_objx/lv_tabview.c
index 67a55842cc..39cb837d92 100644
--- a/lv_objx/lv_tabview.c
+++ b/lv_objx/lv_tabview.c
@@ -241,6 +241,8 @@ void lv_tabview_set_tab_act(lv_obj_t * tabview, uint16_t id, bool anim_en)
     anim_en = false;
 #endif
     lv_tabview_ext_t * ext = lv_obj_get_ext_attr(tabview);
+    if(ext->tab_cur == id) return;
+
     lv_style_t * style = lv_obj_get_style(ext->content);
 
     if(id >= ext->tab_cnt) id = ext->tab_cnt - 1;
diff --git a/lv_objx/lv_win.c b/lv_objx/lv_win.c
index 00202d5a75..e1dedffa6d 100644
--- a/lv_objx/lv_win.c
+++ b/lv_objx/lv_win.c
@@ -207,6 +207,8 @@ void lv_win_set_title(lv_obj_t * win, const char * title)
 void lv_win_set_btn_size(lv_obj_t * win, lv_coord_t size)
 {
     lv_win_ext_t * ext = lv_obj_get_ext_attr(win);
+    if(ext->btn_size == size) return;
+
     ext->btn_size = size;
 
     lv_win_realign(win);