diff --git a/user/screen.c b/user/screen.c
index c75bd8e..9b3006c 100644
--- a/user/screen.c
+++ b/user/screen.c
@@ -1373,7 +1373,8 @@ screen_report_sgr(char *buffer)
 
 //region --- Printing ---
 
-static const char *putchar_graphic(const char *ch)
+static const char* ICACHE_FLASH_ATTR
+putchar_graphic(const char *ch)
 {
 	static char buf[4];
 
diff --git a/user/serial.c b/user/serial.c
index 74a31d1..f2dcae3 100644
--- a/user/serial.c
+++ b/user/serial.c
@@ -21,7 +21,7 @@ static void buf_putc(char c)
 static void ICACHE_FLASH_ATTR
 buf_pop(void *unused)
 {
-	u32 quantity = 32;
+	u32 quantity = 16;
 	u32 old_ls;
 	while (quantity > 0) {
 		// stop when done
diff --git a/user/utf8.h b/user/utf8.h
index 81f9372..d0c0e57 100644
--- a/user/utf8.h
+++ b/user/utf8.h
@@ -8,7 +8,7 @@
 #include <c_types.h>
 
 // 160 is maximum possible
-#define UNICODE_CACHE_SIZE 160
+#define UNICODE_CACHE_SIZE 100
 
 typedef u8 UnicodeCacheRef;
 #define IS_UNICODE_CACHE_REF(c) ((c) < 32 || (c) >= 127)