From bf55c2d0a95722ca617c8633b72d8fa817ab2fef Mon Sep 17 00:00:00 2001
From: Imbus <>
Date: Sun, 15 Feb 2026 03:10:54 +0100
Subject: [PATCH] Performance: Update progress bar only when changed

---
 writeimg.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/writeimg.c b/writeimg.c
index f606624..1e473bf 100644
--- a/writeimg.c
+++ b/writeimg.c
@@ -3,6 +3,7 @@
 #include <fcntl.h>
 #include <getopt.h>
 #include <libgen.h>
+#include <limits.h>
 #include <signal.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -41,8 +42,12 @@
 #define BAR_WIDTH 50
 
 void print_progress(int current, int total) {
-    float fraction = (float)current / total;
-    int   filled = (int)(fraction * BAR_WIDTH);
+    static int last = INT_MAX;
+    float      fraction = (float)current / total;
+    int        filled = (int)(fraction * BAR_WIDTH);
+
+    if (filled == last)
+        return; /* Avoid unnecessary io/flushes */
 
     printf("\r[");
     for (int i = 0; i < BAR_WIDTH; i++) {