diff --git a/app/modules/u8g.c b/app/modules/u8g.c
index e3ae55e8..9876616f 100644
--- a/app/modules/u8g.c
+++ b/app/modules/u8g.c
@@ -25,15 +25,28 @@ static const u8g_fntpgm_uint8_t *font_array[] =
 };
 
 
+static uint32_t *u8g_pgm_cached_iadr = NULL;
+static uint32_t u8g_pgm_cached_data;
+
 // function to read 4-byte aligned from program memory AKA irom0
-u8g_pgm_uint8_t u8g_pgm_read(const u8g_pgm_uint8_t *adr)
+u8g_pgm_uint8_t ICACHE_FLASH_ATTR u8g_pgm_read(const u8g_pgm_uint8_t *adr)
 {
     uint32_t iadr = (uint32_t)adr;
     // set up pointer to 4-byte aligned memory location
     uint32_t *ptr = (uint32_t *)(iadr & ~0x3);
+    uint32_t pgm_data;
 
-    // read 4-byte aligned
-    uint32_t pgm_data = *ptr;
+    if (ptr == u8g_pgm_cached_iadr)
+    {
+        pgm_data = u8g_pgm_cached_data;
+    }
+    else
+    {
+        // read 4-byte aligned
+        pgm_data = *ptr;
+        u8g_pgm_cached_iadr = ptr;
+        u8g_pgm_cached_data = pgm_data;
+    }
 
     // return the correct byte within the retrieved 32bit word
     return pgm_data >> ((iadr % 4) * 8);
@@ -962,7 +975,7 @@ const LUA_REG_TYPE lu8g_map[] =
     { LNILKEY, LNILVAL }
 };
 
-LUALIB_API int ICACHE_FLASH_ATTR luaopen_u8g( lua_State *L )
+LUALIB_API int luaopen_u8g( lua_State *L )
 {
 #if LUA_OPTIMIZE_MEMORY > 0
     luaL_rometatable(L, "u8g.display", (void *)lu8g_display_map);  // create metatable