From 78d620981879065fdb9964d9750d200f008257a1 Mon Sep 17 00:00:00 2001
From: user <user@mail.com>
Date: Sat, 12 Jul 2025 09:12:08 -0400
Subject: [PATCH] only move cursor when needed

---
 src/Aquarium.cpp | 37 ++++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/src/Aquarium.cpp b/src/Aquarium.cpp
index a6cc3eb..46536f7 100644
--- a/src/Aquarium.cpp
+++ b/src/Aquarium.cpp
@@ -280,35 +280,38 @@ void Aquarium::initColorLookup() {
 void Aquarium::renderToScreen() {
   static std::string output;
   output.clear();
-  output.reserve(height * width * 20); // Reserve space for efficiency
+  output.reserve(height * width * 20);
+
+  int cursor_y = -1, cursor_x = -1;
 
   for (int y = 0; y < height; ++y) {
     for (int x = 0; x < width; ++x) {
       const Cell &newCell = currentFrame[y][x];
       Cell &oldCell = previousFrame[y][x];
 
-      if (newCell != oldCell) {
-        oldCell = newCell;
+      if (newCell == oldCell)
+        continue;
 
-        // Move cursor to position
+      oldCell = newCell;
+
+      // Move cursor only when needed
+      if (cursor_y != y || cursor_x != x) {
         output += ANSI::moveTo(y, x);
-
-        // Reset cell
-        output += ANSI::RESET_BLACK_BG;
-
-        // Set color and attributes
-        if (newCell.bold) {
-          output += ANSI::BOLD;
-        }
-        output += colorLookup[static_cast<unsigned char>(newCell.colorChar)];
-
-        // Add the character
-        output += newCell.ch;
+        cursor_y = y;
+        cursor_x = x;
       }
+
+      // Apply cell formatting and character
+      output += ANSI::RESET_BLACK_BG;
+      if (newCell.bold)
+        output += ANSI::BOLD;
+      output += colorLookup[static_cast<unsigned char>(newCell.colorChar)];
+      output += newCell.ch;
+
+      ++cursor_x;
     }
   }
 
-  // Output everything at once
   if (!output.empty()) {
     std::cout << output << std::flush;
   }