diff --git a/src/lv_draw/lv_draw_blend.c b/src/lv_draw/lv_draw_blend.c
index 9961e182b..38f56c2ed 100644
--- a/src/lv_draw/lv_draw_blend.c
+++ b/src/lv_draw/lv_draw_blend.c
@@ -31,7 +31,7 @@ static void fill_set_px(const lv_area_t * disp_area, lv_color_t * disp_buf,  con
                         lv_color_t color, lv_opa_t opa,
                         const lv_opa_t * mask, lv_draw_mask_res_t mask_res);
 
-static void fill_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
+LV_ATTRIBUTE_FAST_MEM static void fill_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
                         lv_color_t color, lv_opa_t opa,
                         const lv_opa_t * mask, lv_draw_mask_res_t mask_res);
 
@@ -43,7 +43,7 @@ static void map_set_px(const lv_area_t * disp_area, lv_color_t * disp_buf,  cons
                        const lv_area_t * map_area, const lv_color_t * map_buf, lv_opa_t opa,
                        const lv_opa_t * mask, lv_draw_mask_res_t mask_res);
 
-static void map_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
+LV_ATTRIBUTE_FAST_MEM static void map_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
                        const lv_area_t * map_area, const lv_color_t * map_buf, lv_opa_t opa,
                        const lv_opa_t * mask, lv_draw_mask_res_t mask_res);
 
@@ -115,7 +115,7 @@ mask_tmp_x++;
  * @param opa
  * @param mode
  */
-void lv_blend_fill(const lv_area_t * clip_area, const lv_area_t * fill_area,
+LV_ATTRIBUTE_FAST_MEM void lv_blend_fill(const lv_area_t * clip_area, const lv_area_t * fill_area,
                    lv_color_t color, lv_opa_t * mask, lv_draw_mask_res_t mask_res, lv_opa_t opa,
                    lv_blend_mode_t mode)
 {
@@ -169,7 +169,7 @@ void lv_blend_fill(const lv_area_t * clip_area, const lv_area_t * fill_area,
 }
 
 
-void lv_blend_map(const lv_area_t * clip_area, const lv_area_t * map_area, const lv_color_t * map_buf,
+LV_ATTRIBUTE_FAST_MEM void lv_blend_map(const lv_area_t * clip_area, const lv_area_t * map_area, const lv_color_t * map_buf,
                   lv_opa_t * mask, lv_draw_mask_res_t mask_res,
                   lv_opa_t opa, lv_blend_mode_t mode)
 {
@@ -262,7 +262,7 @@ static void fill_set_px(const lv_area_t * disp_area, lv_color_t * disp_buf,  con
     }
 }
 
-static void fill_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
+LV_ATTRIBUTE_FAST_MEM static void fill_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
                         lv_color_t color, lv_opa_t opa,
                         const lv_opa_t * mask, lv_draw_mask_res_t mask_res)
 {
@@ -598,7 +598,7 @@ static void map_set_px(const lv_area_t * disp_area, lv_color_t * disp_buf,  cons
 }
 
 
-static void map_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
+LV_ATTRIBUTE_FAST_MEM static void map_normal(const lv_area_t * disp_area, lv_color_t * disp_buf,  const lv_area_t * draw_area,
                        const lv_area_t * map_area, const lv_color_t * map_buf, lv_opa_t opa,
                        const lv_opa_t * mask, lv_draw_mask_res_t mask_res)
 {
diff --git a/src/lv_draw/lv_draw_blend.h b/src/lv_draw/lv_draw_blend.h
index 07c6f576c..728f8ac46 100644
--- a/src/lv_draw/lv_draw_blend.h
+++ b/src/lv_draw/lv_draw_blend.h
@@ -36,11 +36,11 @@ typedef uint8_t lv_blend_mode_t;
  * GLOBAL PROTOTYPES
  **********************/
 
-void lv_blend_fill(const lv_area_t * clip_area, const lv_area_t * fill_area, lv_color_t color,
+LV_ATTRIBUTE_FAST_MEM void lv_blend_fill(const lv_area_t * clip_area, const lv_area_t * fill_area, lv_color_t color,
                    lv_opa_t * mask, lv_draw_mask_res_t mask_res, lv_opa_t opa, lv_blend_mode_t mode);
 
 
-void lv_blend_map(const lv_area_t * clip_area, const lv_area_t * map_area, const lv_color_t * map_buf,
+LV_ATTRIBUTE_FAST_MEM void lv_blend_map(const lv_area_t * clip_area, const lv_area_t * map_area, const lv_color_t * map_buf,
                   lv_opa_t * mask, lv_draw_mask_res_t mask_res, lv_opa_t opa, lv_blend_mode_t mode);
 
 /**********************
diff --git a/src/lv_draw/lv_draw_img.c b/src/lv_draw/lv_draw_img.c
index e9ab8f584..3c7316027 100644
--- a/src/lv_draw/lv_draw_img.c
+++ b/src/lv_draw/lv_draw_img.c
@@ -25,10 +25,10 @@
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
+LV_ATTRIBUTE_FAST_MEM static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
                                  lv_draw_img_dsc_t * draw_dsc);
 
-static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
+LV_ATTRIBUTE_FAST_MEM static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
                         lv_draw_img_dsc_t * draw_dsc,
                         bool chroma_key, bool alpha_byte);
 
@@ -228,7 +228,7 @@ lv_img_src_t lv_img_src_get_type(const void * src)
  *   STATIC FUNCTIONS
  **********************/
 
-static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
+LV_ATTRIBUTE_FAST_MEM static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mask, const void * src,
                                  lv_draw_img_dsc_t * draw_dsc)
 {
     if(draw_dsc->opa <= LV_OPA_MIN) return LV_RES_OK;
@@ -333,7 +333,7 @@ static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * mas
  * @param zoom zoom factor
  * @param antialias anti-alias transformations (rotate, zoom) or not
  */
-static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
+LV_ATTRIBUTE_FAST_MEM static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area, const uint8_t * map_p,
                         lv_draw_img_dsc_t * draw_dsc, bool chroma_key, bool alpha_byte)
 {
     /* Use the clip area as draw area*/
diff --git a/src/lv_draw/lv_draw_label.c b/src/lv_draw/lv_draw_label.c
index 13b15dd58..13edf110f 100644
--- a/src/lv_draw/lv_draw_label.c
+++ b/src/lv_draw/lv_draw_label.c
@@ -32,9 +32,9 @@ typedef uint8_t cmd_state_t;
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void lv_draw_letter(const lv_point_t * pos_p, const lv_area_t * clip_area, const lv_font_t * font_p,
+LV_ATTRIBUTE_FAST_MEM static void lv_draw_letter(const lv_point_t * pos_p, const lv_area_t * clip_area, const lv_font_t * font_p,
                            uint32_t letter, lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode);
-static void draw_letter_normal(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_dsc_t * g, const lv_area_t * clip_area,
+LV_ATTRIBUTE_FAST_MEM static void draw_letter_normal(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_dsc_t * g, const lv_area_t * clip_area,
                                const uint8_t * map_p, lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode);
 static void draw_letter_subpx(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_dsc_t * g, const lv_area_t * clip_area,
                               const uint8_t * map_p, lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode);
@@ -87,7 +87,7 @@ const uint8_t _lv_bpp8_opa_table[256] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1
  *   GLOBAL FUNCTIONS
  **********************/
 
-void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc)
 {
     lv_memset_00(dsc, sizeof(lv_draw_label_dsc_t));
     dsc->opa = LV_OPA_COVER;
@@ -106,7 +106,7 @@ void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc)
  * @param dsc pointer to draw descriptor
  * @param txt `\0` terminated text to write
  */
-void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
                    const char * txt, lv_draw_label_hint_t * hint)
 {
 
@@ -390,7 +390,7 @@ void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_lab
  * @param color color of letter
  * @param opa opacity of letter (0..255)
  */
-static void lv_draw_letter(const lv_point_t * pos_p, const lv_area_t * clip_area, const lv_font_t * font_p,
+LV_ATTRIBUTE_FAST_MEM static void lv_draw_letter(const lv_point_t * pos_p, const lv_area_t * clip_area, const lv_font_t * font_p,
                            uint32_t letter,
                            lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode)
 {
@@ -443,7 +443,7 @@ static void lv_draw_letter(const lv_point_t * pos_p, const lv_area_t * clip_area
 }
 
 
-static void draw_letter_normal(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_dsc_t * g, const lv_area_t * clip_area,
+LV_ATTRIBUTE_FAST_MEM static void draw_letter_normal(lv_coord_t pos_x, lv_coord_t pos_y, lv_font_glyph_dsc_t * g, const lv_area_t * clip_area,
                                const uint8_t * map_p, lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode)
 {
     const uint8_t * bpp_opa_table_p;
diff --git a/src/lv_draw/lv_draw_label.h b/src/lv_draw/lv_draw_label.h
index 93186fcc5..07c85aba1 100644
--- a/src/lv_draw/lv_draw_label.h
+++ b/src/lv_draw/lv_draw_label.h
@@ -64,7 +64,7 @@ typedef struct {
  * GLOBAL PROTOTYPES
  **********************/
 
-void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc);
 
 /**
  * Write a text
@@ -73,7 +73,7 @@ void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc);
  * @param dsc pointer to draw descriptor
  * @param txt `\0` terminated text to write
  */
-void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
                    const char * txt, lv_draw_label_hint_t * hint);
 
 /***********************
diff --git a/src/lv_draw/lv_draw_line.c b/src/lv_draw/lv_draw_line.c
index b842979ba..3b9316327 100644
--- a/src/lv_draw/lv_draw_line.c
+++ b/src/lv_draw/lv_draw_line.c
@@ -24,11 +24,11 @@
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                            lv_draw_line_dsc_t * dsc);
-static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                           lv_draw_line_dsc_t * dsc);
-static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                           lv_draw_line_dsc_t * dsc);
 
 /**********************
@@ -43,7 +43,7 @@ static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2,
  *   GLOBAL FUNCTIONS
  **********************/
 
-void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc)
 {
     lv_memset_00(dsc, sizeof(lv_draw_line_dsc_t));
     dsc->width = 1;
@@ -59,7 +59,7 @@ void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc)
  * @param style pointer to a line's style
  * @param opa_scale scale down all opacities by the factor
  */
-void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                   lv_draw_line_dsc_t * dsc)
 {
     if(dsc->width == 0) return;
@@ -115,7 +115,7 @@ void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv
  *   STATIC FUNCTIONS
  **********************/
 
-static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                           lv_draw_line_dsc_t * dsc)
 {
     lv_opa_t opa = dsc->opa;
@@ -215,7 +215,7 @@ static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2,
 }
 
 
-static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                           lv_draw_line_dsc_t * dsc)
 {
     lv_opa_t opa = dsc->opa;
@@ -309,7 +309,7 @@ static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2,
 }
 
 
-static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
+LV_ATTRIBUTE_FAST_MEM static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
                            lv_draw_line_dsc_t * dsc)
 {
     /*Keep the great y in p1*/
diff --git a/src/lv_draw/lv_draw_line.h b/src/lv_draw/lv_draw_line.h
index 1616209d9..948013bf3 100644
--- a/src/lv_draw/lv_draw_line.h
+++ b/src/lv_draw/lv_draw_line.h
@@ -46,10 +46,10 @@ typedef struct {
  * @param style pointer to a line's style
  * @param opa_scale scale down all opacities by the factor
  */
-void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * mask,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * mask,
                   lv_draw_line_dsc_t * dsc);
 
-void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc);
 
 /**********************
  *      MACROS
diff --git a/src/lv_draw/lv_draw_rect.c b/src/lv_draw/lv_draw_rect.c
index 377490b34..90ce11cfe 100644
--- a/src/lv_draw/lv_draw_rect.c
+++ b/src/lv_draw/lv_draw_rect.c
@@ -28,14 +28,14 @@
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
-static void draw_border(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM static void draw_border(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
 static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
-static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i);
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i);
 #if LV_USE_SHADOW
-static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
-static void shadow_draw_corner_buf(const lv_area_t * coords,  uint16_t * sh_buf, lv_coord_t s, lv_coord_t r);
-static void shadow_blur_corner(lv_coord_t size, lv_coord_t sw, uint16_t * sh_ups_buf);
+LV_ATTRIBUTE_FAST_MEM static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM static void shadow_draw_corner_buf(const lv_area_t * coords,  uint16_t * sh_buf, lv_coord_t s, lv_coord_t r);
+LV_ATTRIBUTE_FAST_MEM static void shadow_blur_corner(lv_coord_t size, lv_coord_t sw, uint16_t * sh_ups_buf);
 #endif
 static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
 static void draw_value(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
@@ -57,7 +57,7 @@ static int32_t sh_cache_r = -1;
  *   GLOBAL FUNCTIONS
  **********************/
 
-void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc)
 {
     lv_memset_00(dsc, sizeof(lv_draw_rect_dsc_t));
     dsc->bg_color = LV_COLOR_WHITE;
@@ -137,7 +137,7 @@ void lv_draw_px(const lv_point_t * point, const lv_area_t * clip_area, const lv_
  *   STATIC FUNCTIONS
  **********************/
 
-static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->bg_opa <= LV_OPA_MIN) return;
 
@@ -346,7 +346,7 @@ static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_re
 
 }
 
-static void draw_border(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM static void draw_border(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->border_opa <= LV_OPA_MIN) return;
     if(dsc->border_width == 0) return;
@@ -559,7 +559,7 @@ static void draw_border(const lv_area_t * coords, const lv_area_t * clip, lv_dra
     lv_mem_buf_release(mask_buf);
 }
 
-static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i)
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i)
 {
     int32_t min = (dsc->bg_main_color_stop * s) >> 8;
     if(i <= min) return dsc->bg_color;
@@ -575,7 +575,7 @@ static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coo
 }
 
 #if LV_USE_SHADOW
-static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
 {
     /*Check whether the shadow is visible*/
     if(dsc->shadow_width == 0) return;
@@ -1042,7 +1042,7 @@ static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip, lv_dra
  * @param sw shadow width
  * @param r radius
  */
-static void shadow_draw_corner_buf(const lv_area_t * coords, uint16_t * sh_buf, lv_coord_t sw, lv_coord_t r)
+LV_ATTRIBUTE_FAST_MEM static void shadow_draw_corner_buf(const lv_area_t * coords, uint16_t * sh_buf, lv_coord_t sw, lv_coord_t r)
 {
     int32_t sw_ori = sw;
     int32_t size = sw_ori  + r;
@@ -1125,7 +1125,7 @@ static void shadow_draw_corner_buf(const lv_area_t * coords, uint16_t * sh_buf,
 
 }
 
-static void shadow_blur_corner(lv_coord_t size, lv_coord_t sw, uint16_t * sh_ups_buf)
+LV_ATTRIBUTE_FAST_MEM static void shadow_blur_corner(lv_coord_t size, lv_coord_t sw, uint16_t * sh_ups_buf)
 {
     int32_t s_left = sw >> 1;
     int32_t s_right = (sw >> 1);
diff --git a/src/lv_draw/lv_draw_rect.h b/src/lv_draw/lv_draw_rect.h
index f779ae4ed..07cf79049 100644
--- a/src/lv_draw/lv_draw_rect.h
+++ b/src/lv_draw/lv_draw_rect.h
@@ -84,7 +84,7 @@ typedef struct {
  * GLOBAL PROTOTYPES
  **********************/
 
-void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc);
 
 /**
  * Draw a rectangle
diff --git a/src/lv_misc/lv_color.h b/src/lv_misc/lv_color.h
index f53ef0fc9..89e86b164 100644
--- a/src/lv_misc/lv_color.h
+++ b/src/lv_misc/lv_color.h
@@ -433,7 +433,7 @@ static inline uint32_t lv_color_to32(lv_color_t color)
  * @param mix The ratio of the colors. 0: full `c2`, 255: full `c1`, 127: half `c1` and half`c2`
  * @return the mixed color
  */
-static inline lv_color_t lv_color_mix(lv_color_t c1, lv_color_t c2, uint8_t mix)
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix(lv_color_t c1, lv_color_t c2, uint8_t mix)
 {
     lv_color_t ret;
 #if LV_COLOR_DEPTH != 1
@@ -450,7 +450,7 @@ static inline lv_color_t lv_color_mix(lv_color_t c1, lv_color_t c2, uint8_t mix)
     return ret;
 }
 
-static inline void lv_color_premult(lv_color_t c, uint8_t mix, uint16_t * out)
+LV_ATTRIBUTE_FAST_MEM static inline void lv_color_premult(lv_color_t c, uint8_t mix, uint16_t * out)
 {
 #if LV_COLOR_DEPTH != 1
     out[0] = (uint16_t) LV_COLOR_GET_R(c) * mix;
@@ -474,7 +474,7 @@ static inline void lv_color_premult(lv_color_t c, uint8_t mix, uint16_t * out)
  * @return the mixed color
  * @note 255 won't give clearly `c1`.
  */
-static inline lv_color_t lv_color_mix_premult(uint16_t * premult_c1, lv_color_t c2, uint8_t mix)
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix_premult(uint16_t * premult_c1, lv_color_t c2, uint8_t mix)
 {
     lv_color_t ret;
 #if LV_COLOR_DEPTH != 1
@@ -506,7 +506,7 @@ static inline lv_color_t lv_color_mix_premult(uint16_t * premult_c1, lv_color_t
  * @param res_color the result color
  * @param res_opa the result opacity
  */
-static inline void lv_color_mix_with_alpha(lv_color_t bg_color, lv_opa_t bg_opa, lv_color_t fg_color, lv_opa_t fg_opa,
+LV_ATTRIBUTE_FAST_MEM static inline void lv_color_mix_with_alpha(lv_color_t bg_color, lv_opa_t bg_opa, lv_color_t fg_color, lv_opa_t fg_opa,
                                            lv_color_t * res_color, lv_opa_t * res_opa)
 {
     /* Pick the foreground if it's fully opaque or the Background is fully transparent*/