diff --git a/lib/src/widgets/window_caption_button.dart b/lib/src/widgets/window_caption_button.dart
index 5e1eecff..44b4185e 100644
--- a/lib/src/widgets/window_caption_button.dart
+++ b/lib/src/widgets/window_caption_button.dart
@@ -12,34 +12,36 @@ class _IconChromeMinimizePainter extends CustomPainter {
 
   final Color color;
 
+  // The 16×16 icon geometry does not depend on its color or paint size.
+  // Build the native Path once instead of on every hover/theme repaint.
+  static final Path _glyph = Path()
+    ..moveTo(3.49805, 8)
+    ..cubicTo(3.42969, 8, 3.36458, 7.98698, 3.30273, 7.96094)
+    ..cubicTo(3.24414, 7.9349, 3.19206, 7.89909, 3.14648, 7.85352)
+    ..cubicTo(3.10091, 7.80794, 3.0651, 7.75586, 3.03906, 7.69727)
+    ..cubicTo(3.01302, 7.63542, 3, 7.57031, 3, 7.50195)
+    ..cubicTo(3, 7.43359, 3.01302, 7.37012, 3.03906, 7.31152)
+    ..cubicTo(3.0651, 7.24967, 3.10091, 7.19596, 3.14648, 7.15039)
+    ..cubicTo(3.19206, 7.10156, 3.24414, 7.06413, 3.30273, 7.03809)
+    ..cubicTo(3.36458, 7.01204, 3.42969, 6.99902, 3.49805, 6.99902)
+    ..lineTo(12.502, 6.99902)
+    ..cubicTo(12.5703, 6.99902, 12.6338, 7.01204, 12.6924, 7.03809)
+    ..cubicTo(12.7542, 7.06413, 12.8079, 7.10156, 12.8535, 7.15039)
+    ..cubicTo(12.8991, 7.19596, 12.9349, 7.24967, 12.9609, 7.31152)
+    ..cubicTo(12.987, 7.37012, 13, 7.43359, 13, 7.50195)
+    ..cubicTo(13, 7.57031, 12.987, 7.63542, 12.9609, 7.69727)
+    ..cubicTo(12.9349, 7.75586, 12.8991, 7.80794, 12.8535, 7.85352)
+    ..cubicTo(12.8079, 7.89909, 12.7542, 7.9349, 12.6924, 7.96094)
+    ..cubicTo(12.6338, 7.98698, 12.5703, 8, 12.502, 8)
+    ..close();
+
   @override
   void paint(Canvas canvas, Size size) {
     final paint = Paint()
       ..color = color
       ..style = PaintingStyle.fill;
 
-    final path = Path()
-      ..moveTo(3.49805, 8)
-      ..cubicTo(3.42969, 8, 3.36458, 7.98698, 3.30273, 7.96094)
-      ..cubicTo(3.24414, 7.9349, 3.19206, 7.89909, 3.14648, 7.85352)
-      ..cubicTo(3.10091, 7.80794, 3.0651, 7.75586, 3.03906, 7.69727)
-      ..cubicTo(3.01302, 7.63542, 3, 7.57031, 3, 7.50195)
-      ..cubicTo(3, 7.43359, 3.01302, 7.37012, 3.03906, 7.31152)
-      ..cubicTo(3.0651, 7.24967, 3.10091, 7.19596, 3.14648, 7.15039)
-      ..cubicTo(3.19206, 7.10156, 3.24414, 7.06413, 3.30273, 7.03809)
-      ..cubicTo(3.36458, 7.01204, 3.42969, 6.99902, 3.49805, 6.99902)
-      ..lineTo(12.502, 6.99902)
-      ..cubicTo(12.5703, 6.99902, 12.6338, 7.01204, 12.6924, 7.03809)
-      ..cubicTo(12.7542, 7.06413, 12.8079, 7.10156, 12.8535, 7.15039)
-      ..cubicTo(12.8991, 7.19596, 12.9349, 7.24967, 12.9609, 7.31152)
-      ..cubicTo(12.987, 7.37012, 13, 7.43359, 13, 7.50195)
-      ..cubicTo(13, 7.57031, 12.987, 7.63542, 12.9609, 7.69727)
-      ..cubicTo(12.9349, 7.75586, 12.8991, 7.80794, 12.8535, 7.85352)
-      ..cubicTo(12.8079, 7.89909, 12.7542, 7.9349, 12.6924, 7.96094)
-      ..cubicTo(12.6338, 7.98698, 12.5703, 8, 12.502, 8)
-      ..close();
-
-    canvas.drawPath(path, paint);
+    canvas.drawPath(_glyph, paint);
   }
 
   @override
@@ -53,58 +55,60 @@ class _IconChromeMaximizePainter extends CustomPainter {
 
   final Color color;
 
+  // The 16×16 icon geometry does not depend on its color or paint size.
+  // Build the native Path once instead of on every hover/theme repaint.
+  static final Path _glyph = Path()
+    ..moveTo(4.47461, 13)
+    ..cubicTo(4.2793, 13, 4.09212, 12.9609, 3.91309, 12.8828)
+    ..cubicTo(3.73405, 12.8014, 3.57617, 12.694, 3.43945, 12.5605)
+    ..cubicTo(3.30599, 12.4238, 3.19857, 12.266, 3.11719, 12.0869)
+    ..cubicTo(3.03906, 11.9079, 3, 11.7207, 3, 11.5254)
+    ..lineTo(3, 4.47461)
+    ..cubicTo(3, 4.2793, 3.03906, 4.09212, 3.11719, 3.91309)
+    ..cubicTo(3.19857, 3.73405, 3.30599, 3.5778, 3.43945, 3.44434)
+    ..cubicTo(3.57617, 3.30762, 3.73405, 3.2002, 3.91309, 3.12207)
+    ..cubicTo(4.09212, 3.04069, 4.2793, 3, 4.47461, 3)
+    ..lineTo(11.5254, 3)
+    ..cubicTo(11.7207, 3, 11.9079, 3.04069, 12.0869, 3.12207)
+    ..cubicTo(12.266, 3.2002, 12.4222, 3.30762, 12.5557, 3.44434)
+    ..cubicTo(12.6924, 3.5778, 12.7998, 3.73405, 12.8779, 3.91309)
+    ..cubicTo(12.9593, 4.09212, 13, 4.2793, 13, 4.47461)
+    ..lineTo(13, 11.5254)
+    ..cubicTo(13, 11.7207, 12.9593, 11.9079, 12.8779, 12.0869)
+    ..cubicTo(12.7998, 12.266, 12.6924, 12.4238, 12.5557, 12.5605)
+    ..cubicTo(12.4222, 12.694, 12.266, 12.8014, 12.0869, 12.8828)
+    ..cubicTo(11.9079, 12.9609, 11.7207, 13, 11.5254, 13)
+    ..lineTo(4.47461, 13)
+    ..moveTo(11.501, 11.999)
+    ..cubicTo(11.5693, 11.999, 11.6328, 11.986, 11.6914, 11.96)
+    ..cubicTo(11.7533, 11.9339, 11.807, 11.8981, 11.8525, 11.8525)
+    ..cubicTo(11.8981, 11.807, 11.9339, 11.7549, 11.96, 11.6963)
+    ..cubicTo(11.986, 11.6344, 11.999, 11.5693, 11.999, 11.501)
+    ..lineTo(11.999, 4.49902)
+    ..cubicTo(11.999, 4.43066, 11.986, 4.36719, 11.96, 4.30859)
+    ..cubicTo(11.9339, 4.24674, 11.8981, 4.19303, 11.8525, 4.14746)
+    ..cubicTo(11.807, 4.10189, 11.7533, 4.06608, 11.6914, 4.04004)
+    ..cubicTo(11.6328, 4.014, 11.5693, 4.00098, 11.501, 4.00098)
+    ..lineTo(4.49902, 4.00098)
+    ..cubicTo(4.43066, 4.00098, 4.36556, 4.014, 4.30371, 4.04004)
+    ..cubicTo(4.24512, 4.06608, 4.19303, 4.10189, 4.14746, 4.14746)
+    ..cubicTo(4.10189, 4.19303, 4.06608, 4.24674, 4.04004, 4.30859)
+    ..cubicTo(4.014, 4.36719, 4.00098, 4.43066, 4.00098, 4.49902)
+    ..lineTo(4.00098, 11.501)
+    ..cubicTo(4.00098, 11.5693, 4.014, 11.6344, 4.04004, 11.6963)
+    ..cubicTo(4.06608, 11.7549, 4.10189, 11.807, 4.14746, 11.8525)
+    ..cubicTo(4.19303, 11.8981, 4.24512, 11.9339, 4.30371, 11.96)
+    ..cubicTo(4.36556, 11.986, 4.43066, 11.999, 4.49902, 11.999)
+    ..lineTo(11.501, 11.999)
+    ..close();
+
   @override
   void paint(Canvas canvas, Size size) {
     final paint = Paint()
       ..color = color
       ..style = PaintingStyle.fill;
 
-    Path path = Path()
-      ..moveTo(4.47461, 13)
-      ..cubicTo(4.2793, 13, 4.09212, 12.9609, 3.91309, 12.8828)
-      ..cubicTo(3.73405, 12.8014, 3.57617, 12.694, 3.43945, 12.5605)
-      ..cubicTo(3.30599, 12.4238, 3.19857, 12.266, 3.11719, 12.0869)
-      ..cubicTo(3.03906, 11.9079, 3, 11.7207, 3, 11.5254)
-      ..lineTo(3, 4.47461)
-      ..cubicTo(3, 4.2793, 3.03906, 4.09212, 3.11719, 3.91309)
-      ..cubicTo(3.19857, 3.73405, 3.30599, 3.5778, 3.43945, 3.44434)
-      ..cubicTo(3.57617, 3.30762, 3.73405, 3.2002, 3.91309, 3.12207)
-      ..cubicTo(4.09212, 3.04069, 4.2793, 3, 4.47461, 3)
-      ..lineTo(11.5254, 3)
-      ..cubicTo(11.7207, 3, 11.9079, 3.04069, 12.0869, 3.12207)
-      ..cubicTo(12.266, 3.2002, 12.4222, 3.30762, 12.5557, 3.44434)
-      ..cubicTo(12.6924, 3.5778, 12.7998, 3.73405, 12.8779, 3.91309)
-      ..cubicTo(12.9593, 4.09212, 13, 4.2793, 13, 4.47461)
-      ..lineTo(13, 11.5254)
-      ..cubicTo(13, 11.7207, 12.9593, 11.9079, 12.8779, 12.0869)
-      ..cubicTo(12.7998, 12.266, 12.6924, 12.4238, 12.5557, 12.5605)
-      ..cubicTo(12.4222, 12.694, 12.266, 12.8014, 12.0869, 12.8828)
-      ..cubicTo(11.9079, 12.9609, 11.7207, 13, 11.5254, 13)
-      ..lineTo(4.47461, 13)
-      ..moveTo(11.501, 11.999)
-      ..cubicTo(11.5693, 11.999, 11.6328, 11.986, 11.6914, 11.96)
-      ..cubicTo(11.7533, 11.9339, 11.807, 11.8981, 11.8525, 11.8525)
-      ..cubicTo(11.8981, 11.807, 11.9339, 11.7549, 11.96, 11.6963)
-      ..cubicTo(11.986, 11.6344, 11.999, 11.5693, 11.999, 11.501)
-      ..lineTo(11.999, 4.49902)
-      ..cubicTo(11.999, 4.43066, 11.986, 4.36719, 11.96, 4.30859)
-      ..cubicTo(11.9339, 4.24674, 11.8981, 4.19303, 11.8525, 4.14746)
-      ..cubicTo(11.807, 4.10189, 11.7533, 4.06608, 11.6914, 4.04004)
-      ..cubicTo(11.6328, 4.014, 11.5693, 4.00098, 11.501, 4.00098)
-      ..lineTo(4.49902, 4.00098)
-      ..cubicTo(4.43066, 4.00098, 4.36556, 4.014, 4.30371, 4.04004)
-      ..cubicTo(4.24512, 4.06608, 4.19303, 4.10189, 4.14746, 4.14746)
-      ..cubicTo(4.10189, 4.19303, 4.06608, 4.24674, 4.04004, 4.30859)
-      ..cubicTo(4.014, 4.36719, 4.00098, 4.43066, 4.00098, 4.49902)
-      ..lineTo(4.00098, 11.501)
-      ..cubicTo(4.00098, 11.5693, 4.014, 11.6344, 4.04004, 11.6963)
-      ..cubicTo(4.06608, 11.7549, 4.10189, 11.807, 4.14746, 11.8525)
-      ..cubicTo(4.19303, 11.8981, 4.24512, 11.9339, 4.30371, 11.96)
-      ..cubicTo(4.36556, 11.986, 4.43066, 11.999, 4.49902, 11.999)
-      ..lineTo(11.501, 11.999)
-      ..close();
-
-    canvas.drawPath(path, paint);
+    canvas.drawPath(_glyph, paint);
   }
 
   @override
@@ -118,81 +122,83 @@ class _IconChromeUnmaximizePainter extends CustomPainter {
 
   final Color color;
 
+  // The 16×16 icon geometry does not depend on its color or paint size.
+  // Build the native Path once instead of on every hover/theme repaint.
+  static final Path _glyph = Path()
+    ..moveTo(11.999, 5.96387)
+    ..cubicTo(11.999, 5.69368, 11.9453, 5.43978, 11.8379, 5.20215)
+    ..cubicTo(11.7305, 4.96126, 11.584, 4.75293, 11.3984, 4.57715)
+    ..cubicTo(11.2161, 4.39811, 11.0029, 4.25814, 10.7588, 4.15723)
+    ..cubicTo(10.5179, 4.05306, 10.264, 4.00098, 9.99707, 4.00098)
+    ..lineTo(5.08496, 4.00098)
+    ..cubicTo(5.13704, 3.85124, 5.21029, 3.71452, 5.30469, 3.59082)
+    ..cubicTo(5.39909, 3.46712, 5.50814, 3.36133, 5.63184, 3.27344)
+    ..cubicTo(5.75553, 3.18555, 5.89062, 3.11882, 6.03711, 3.07324)
+    ..cubicTo(6.18685, 3.02441, 6.34147, 3, 6.50098, 3)
+    ..lineTo(9.99707, 3)
+    ..cubicTo(10.4105, 3, 10.7995, 3.07975, 11.1641, 3.23926)
+    ..cubicTo(11.5286, 3.39551, 11.846, 3.60872, 12.1162, 3.87891)
+    ..cubicTo(12.3896, 4.14909, 12.6045, 4.46647, 12.7607, 4.83105)
+    ..cubicTo(12.9202, 5.19564, 13, 5.58464, 13, 5.99805)
+    ..lineTo(13, 9.49902)
+    ..cubicTo(13, 9.65853, 12.9756, 9.81315, 12.9268, 9.96289)
+    ..cubicTo(12.8812, 10.1094, 12.8145, 10.2445, 12.7266, 10.3682)
+    ..cubicTo(12.6387, 10.4919, 12.5329, 10.6009, 12.4092, 10.6953)
+    ..cubicTo(12.2855, 10.7897, 12.1488, 10.863, 11.999, 10.915)
+    ..lineTo(11.999, 5.96387)
+    ..close()
+    ..moveTo(4.47461, 13)
+    ..cubicTo(4.2793, 13, 4.09212, 12.9609, 3.91309, 12.8828)
+    ..cubicTo(3.73405, 12.8014, 3.57617, 12.694, 3.43945, 12.5605)
+    ..cubicTo(3.30599, 12.4238, 3.19857, 12.266, 3.11719, 12.0869)
+    ..cubicTo(3.03906, 11.9079, 3, 11.7207, 3, 11.5254)
+    ..lineTo(3, 6.47656)
+    ..cubicTo(3, 6.27799, 3.03906, 6.09082, 3.11719, 5.91504)
+    ..cubicTo(3.19857, 5.736, 3.30599, 5.57975, 3.43945, 5.44629)
+    ..cubicTo(3.57617, 5.30957, 3.73242, 5.20215, 3.9082, 5.12402)
+    ..cubicTo(4.08724, 5.04264, 4.27604, 5.00195, 4.47461, 5.00195)
+    ..lineTo(9.52344, 5.00195)
+    ..cubicTo(9.72201, 5.00195, 9.91081, 5.04264, 10.0898, 5.12402)
+    ..cubicTo(10.2689, 5.20215, 10.4251, 5.30794, 10.5586, 5.44141)
+    ..cubicTo(10.6921, 5.57487, 10.7979, 5.73112, 10.876, 5.91016)
+    ..cubicTo(10.9574, 6.08919, 10.998, 6.27799, 10.998, 6.47656)
+    ..lineTo(10.998, 11.5254)
+    ..cubicTo(10.998, 11.724, 10.9574, 11.9128, 10.876, 12.0918)
+    ..cubicTo(10.7979, 12.2676, 10.6904, 12.4238, 10.5537, 12.5605)
+    ..cubicTo(10.4202, 12.694, 10.264, 12.8014, 10.085, 12.8828)
+    ..cubicTo(9.90918, 12.9609, 9.72201, 13, 9.52344, 13)
+    ..lineTo(4.47461, 13)
+    ..close()
+    ..moveTo(9.49902, 11.999)
+    ..cubicTo(9.56738, 11.999, 9.63086, 11.986, 9.68945, 11.96)
+    ..cubicTo(9.7513, 11.9339, 9.80501, 11.8981, 9.85059, 11.8525)
+    ..cubicTo(9.89941, 11.807, 9.93685, 11.7549, 9.96289, 11.6963)
+    ..cubicTo(9.98893, 11.6344, 10.002, 11.5693, 10.002, 11.501)
+    ..lineTo(10.002, 6.50098)
+    ..cubicTo(10.002, 6.43262, 9.98893, 6.36751, 9.96289, 6.30566)
+    ..cubicTo(9.93685, 6.24382, 9.90104, 6.1901, 9.85547, 6.14453)
+    ..cubicTo(9.8099, 6.09896, 9.75618, 6.06315, 9.69434, 6.03711)
+    ..cubicTo(9.63249, 6.01107, 9.56738, 5.99805, 9.49902, 5.99805)
+    ..lineTo(4.49902, 5.99805)
+    ..cubicTo(4.43066, 5.99805, 4.36556, 6.01107, 4.30371, 6.03711)
+    ..cubicTo(4.24512, 6.06315, 4.19303, 6.10059, 4.14746, 6.14941)
+    ..cubicTo(4.10189, 6.19499, 4.06608, 6.2487, 4.04004, 6.31055)
+    ..cubicTo(4.014, 6.36914, 4.00098, 6.43262, 4.00098, 6.50098)
+    ..lineTo(4.00098, 11.501)
+    ..cubicTo(4.00098, 11.5693, 4.014, 11.6344, 4.04004, 11.6963)
+    ..cubicTo(4.06608, 11.7549, 4.10189, 11.807, 4.14746, 11.8525)
+    ..cubicTo(4.19303, 11.8981, 4.24512, 11.9339, 4.30371, 11.96)
+    ..cubicTo(4.36556, 11.986, 4.43066, 11.999, 4.49902, 11.999)
+    ..lineTo(9.49902, 11.999)
+    ..close();
+
   @override
   void paint(Canvas canvas, Size size) {
     final paint = Paint()
       ..color = color
       ..style = PaintingStyle.fill;
 
-    final path = Path()
-      ..moveTo(11.999, 5.96387)
-      ..cubicTo(11.999, 5.69368, 11.9453, 5.43978, 11.8379, 5.20215)
-      ..cubicTo(11.7305, 4.96126, 11.584, 4.75293, 11.3984, 4.57715)
-      ..cubicTo(11.2161, 4.39811, 11.0029, 4.25814, 10.7588, 4.15723)
-      ..cubicTo(10.5179, 4.05306, 10.264, 4.00098, 9.99707, 4.00098)
-      ..lineTo(5.08496, 4.00098)
-      ..cubicTo(5.13704, 3.85124, 5.21029, 3.71452, 5.30469, 3.59082)
-      ..cubicTo(5.39909, 3.46712, 5.50814, 3.36133, 5.63184, 3.27344)
-      ..cubicTo(5.75553, 3.18555, 5.89062, 3.11882, 6.03711, 3.07324)
-      ..cubicTo(6.18685, 3.02441, 6.34147, 3, 6.50098, 3)
-      ..lineTo(9.99707, 3)
-      ..cubicTo(10.4105, 3, 10.7995, 3.07975, 11.1641, 3.23926)
-      ..cubicTo(11.5286, 3.39551, 11.846, 3.60872, 12.1162, 3.87891)
-      ..cubicTo(12.3896, 4.14909, 12.6045, 4.46647, 12.7607, 4.83105)
-      ..cubicTo(12.9202, 5.19564, 13, 5.58464, 13, 5.99805)
-      ..lineTo(13, 9.49902)
-      ..cubicTo(13, 9.65853, 12.9756, 9.81315, 12.9268, 9.96289)
-      ..cubicTo(12.8812, 10.1094, 12.8145, 10.2445, 12.7266, 10.3682)
-      ..cubicTo(12.6387, 10.4919, 12.5329, 10.6009, 12.4092, 10.6953)
-      ..cubicTo(12.2855, 10.7897, 12.1488, 10.863, 11.999, 10.915)
-      ..lineTo(11.999, 5.96387)
-      ..close()
-      ..moveTo(4.47461, 13)
-      ..cubicTo(4.2793, 13, 4.09212, 12.9609, 3.91309, 12.8828)
-      ..cubicTo(3.73405, 12.8014, 3.57617, 12.694, 3.43945, 12.5605)
-      ..cubicTo(3.30599, 12.4238, 3.19857, 12.266, 3.11719, 12.0869)
-      ..cubicTo(3.03906, 11.9079, 3, 11.7207, 3, 11.5254)
-      ..lineTo(3, 6.47656)
-      ..cubicTo(3, 6.27799, 3.03906, 6.09082, 3.11719, 5.91504)
-      ..cubicTo(3.19857, 5.736, 3.30599, 5.57975, 3.43945, 5.44629)
-      ..cubicTo(3.57617, 5.30957, 3.73242, 5.20215, 3.9082, 5.12402)
-      ..cubicTo(4.08724, 5.04264, 4.27604, 5.00195, 4.47461, 5.00195)
-      ..lineTo(9.52344, 5.00195)
-      ..cubicTo(9.72201, 5.00195, 9.91081, 5.04264, 10.0898, 5.12402)
-      ..cubicTo(10.2689, 5.20215, 10.4251, 5.30794, 10.5586, 5.44141)
-      ..cubicTo(10.6921, 5.57487, 10.7979, 5.73112, 10.876, 5.91016)
-      ..cubicTo(10.9574, 6.08919, 10.998, 6.27799, 10.998, 6.47656)
-      ..lineTo(10.998, 11.5254)
-      ..cubicTo(10.998, 11.724, 10.9574, 11.9128, 10.876, 12.0918)
-      ..cubicTo(10.7979, 12.2676, 10.6904, 12.4238, 10.5537, 12.5605)
-      ..cubicTo(10.4202, 12.694, 10.264, 12.8014, 10.085, 12.8828)
-      ..cubicTo(9.90918, 12.9609, 9.72201, 13, 9.52344, 13)
-      ..lineTo(4.47461, 13)
-      ..close()
-      ..moveTo(9.49902, 11.999)
-      ..cubicTo(9.56738, 11.999, 9.63086, 11.986, 9.68945, 11.96)
-      ..cubicTo(9.7513, 11.9339, 9.80501, 11.8981, 9.85059, 11.8525)
-      ..cubicTo(9.89941, 11.807, 9.93685, 11.7549, 9.96289, 11.6963)
-      ..cubicTo(9.98893, 11.6344, 10.002, 11.5693, 10.002, 11.501)
-      ..lineTo(10.002, 6.50098)
-      ..cubicTo(10.002, 6.43262, 9.98893, 6.36751, 9.96289, 6.30566)
-      ..cubicTo(9.93685, 6.24382, 9.90104, 6.1901, 9.85547, 6.14453)
-      ..cubicTo(9.8099, 6.09896, 9.75618, 6.06315, 9.69434, 6.03711)
-      ..cubicTo(9.63249, 6.01107, 9.56738, 5.99805, 9.49902, 5.99805)
-      ..lineTo(4.49902, 5.99805)
-      ..cubicTo(4.43066, 5.99805, 4.36556, 6.01107, 4.30371, 6.03711)
-      ..cubicTo(4.24512, 6.06315, 4.19303, 6.10059, 4.14746, 6.14941)
-      ..cubicTo(4.10189, 6.19499, 4.06608, 6.2487, 4.04004, 6.31055)
-      ..cubicTo(4.014, 6.36914, 4.00098, 6.43262, 4.00098, 6.50098)
-      ..lineTo(4.00098, 11.501)
-      ..cubicTo(4.00098, 11.5693, 4.014, 11.6344, 4.04004, 11.6963)
-      ..cubicTo(4.06608, 11.7549, 4.10189, 11.807, 4.14746, 11.8525)
-      ..cubicTo(4.19303, 11.8981, 4.24512, 11.9339, 4.30371, 11.96)
-      ..cubicTo(4.36556, 11.986, 4.43066, 11.999, 4.49902, 11.999)
-      ..lineTo(9.49902, 11.999)
-      ..close();
-
-    canvas.drawPath(path, paint);
+    canvas.drawPath(_glyph, paint);
   }
 
   @override
@@ -206,47 +212,49 @@ class _IconChromeClosePainter extends CustomPainter {
 
   final Color color;
 
+  // The 16×16 icon geometry does not depend on its color or paint size.
+  // Build the native Path once instead of on every hover/theme repaint.
+  static final Path _glyph = Path()
+    ..moveTo(8, 8.70801)
+    ..lineTo(3.85449, 12.8535)
+    ..cubicTo(3.75684, 12.9512, 3.63965, 13, 3.50293, 13)
+    ..cubicTo(3.3597, 13, 3.23926, 12.9528, 3.1416, 12.8584)
+    ..cubicTo(3.0472, 12.7607, 3, 12.6403, 3, 12.4971)
+    ..cubicTo(3, 12.3604, 3.04883, 12.2432, 3.14648, 12.1455)
+    ..lineTo(7.29199, 8)
+    ..lineTo(3.14648, 3.85449)
+    ..cubicTo(3.04883, 3.75684, 3, 3.63802, 3, 3.49805)
+    ..cubicTo(3, 3.42969, 3.01302, 3.36458, 3.03906, 3.30273)
+    ..cubicTo(3.0651, 3.24089, 3.10091, 3.1888, 3.14648, 3.14648)
+    ..cubicTo(3.19206, 3.10091, 3.24577, 3.0651, 3.30762, 3.03906)
+    ..cubicTo(3.36947, 3.01302, 3.43457, 3, 3.50293, 3)
+    ..cubicTo(3.63965, 3, 3.75684, 3.04883, 3.85449, 3.14648)
+    ..lineTo(8, 7.29199)
+    ..lineTo(12.1455, 3.14648)
+    ..cubicTo(12.2432, 3.04883, 12.362, 3, 12.502, 3)
+    ..cubicTo(12.5703, 3, 12.6338, 3.01302, 12.6924, 3.03906)
+    ..cubicTo(12.7542, 3.0651, 12.8079, 3.10091, 12.8535, 3.14648)
+    ..cubicTo(12.8991, 3.19206, 12.9349, 3.24577, 12.9609, 3.30762)
+    ..cubicTo(12.987, 3.36621, 13, 3.42969, 13, 3.49805)
+    ..cubicTo(13, 3.63802, 12.9512, 3.75684, 12.8535, 3.85449)
+    ..lineTo(8.70801, 8)
+    ..lineTo(12.8535, 12.1455)
+    ..cubicTo(12.9512, 12.2432, 13, 12.3604, 13, 12.4971)
+    ..cubicTo(13, 12.5654, 12.987, 12.6305, 12.9609, 12.6924)
+    ..cubicTo(12.9349, 12.7542, 12.8991, 12.8079, 12.8535, 12.8535)
+    ..cubicTo(12.8112, 12.8991, 12.7591, 12.9349, 12.6973, 12.9609)
+    ..cubicTo(12.6354, 12.987, 12.5703, 13, 12.502, 13)
+    ..cubicTo(12.362, 13, 12.2432, 12.9512, 12.1455, 12.8535)
+    ..lineTo(8, 8.70801)
+    ..close();
+
   @override
   void paint(Canvas canvas, Size size) {
     final paint = Paint()
       ..color = color
       ..style = PaintingStyle.fill;
 
-    final path = Path()
-      ..moveTo(8, 8.70801)
-      ..lineTo(3.85449, 12.8535)
-      ..cubicTo(3.75684, 12.9512, 3.63965, 13, 3.50293, 13)
-      ..cubicTo(3.3597, 13, 3.23926, 12.9528, 3.1416, 12.8584)
-      ..cubicTo(3.0472, 12.7607, 3, 12.6403, 3, 12.4971)
-      ..cubicTo(3, 12.3604, 3.04883, 12.2432, 3.14648, 12.1455)
-      ..lineTo(7.29199, 8)
-      ..lineTo(3.14648, 3.85449)
-      ..cubicTo(3.04883, 3.75684, 3, 3.63802, 3, 3.49805)
-      ..cubicTo(3, 3.42969, 3.01302, 3.36458, 3.03906, 3.30273)
-      ..cubicTo(3.0651, 3.24089, 3.10091, 3.1888, 3.14648, 3.14648)
-      ..cubicTo(3.19206, 3.10091, 3.24577, 3.0651, 3.30762, 3.03906)
-      ..cubicTo(3.36947, 3.01302, 3.43457, 3, 3.50293, 3)
-      ..cubicTo(3.63965, 3, 3.75684, 3.04883, 3.85449, 3.14648)
-      ..lineTo(8, 7.29199)
-      ..lineTo(12.1455, 3.14648)
-      ..cubicTo(12.2432, 3.04883, 12.362, 3, 12.502, 3)
-      ..cubicTo(12.5703, 3, 12.6338, 3.01302, 12.6924, 3.03906)
-      ..cubicTo(12.7542, 3.0651, 12.8079, 3.10091, 12.8535, 3.14648)
-      ..cubicTo(12.8991, 3.19206, 12.9349, 3.24577, 12.9609, 3.30762)
-      ..cubicTo(12.987, 3.36621, 13, 3.42969, 13, 3.49805)
-      ..cubicTo(13, 3.63802, 12.9512, 3.75684, 12.8535, 3.85449)
-      ..lineTo(8.70801, 8)
-      ..lineTo(12.8535, 12.1455)
-      ..cubicTo(12.9512, 12.2432, 13, 12.3604, 13, 12.4971)
-      ..cubicTo(13, 12.5654, 12.987, 12.6305, 12.9609, 12.6924)
-      ..cubicTo(12.9349, 12.7542, 12.8991, 12.8079, 12.8535, 12.8535)
-      ..cubicTo(12.8112, 12.8991, 12.7591, 12.9349, 12.6973, 12.9609)
-      ..cubicTo(12.6354, 12.987, 12.5703, 13, 12.502, 13)
-      ..cubicTo(12.362, 13, 12.2432, 12.9512, 12.1455, 12.8535)
-      ..lineTo(8, 8.70801)
-      ..close();
-
-    canvas.drawPath(path, paint);
+    canvas.drawPath(_glyph, paint);
   }
 
   @override
diff --git a/test/window_caption_path_cache_test.dart b/test/window_caption_path_cache_test.dart
new file mode 100644
index 00000000..8da903b0
--- /dev/null
+++ b/test/window_caption_path_cache_test.dart
@@ -0,0 +1,121 @@
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:window_manager/window_manager.dart';
+
+typedef _ButtonFactory = WindowCaptionButton Function(Brightness brightness);
+
+class _Glyph {
+  const _Glyph(this.name, this.create, this.includes, this.excludes);
+
+  final String name;
+  final _ButtonFactory create;
+
+  /// Points (in the 16x16 icon space) that the glyph must fill.
+  final List<Offset> includes;
+
+  /// Points (in the 16x16 icon space) that the glyph must leave empty.
+  final List<Offset> excludes;
+}
+
+final _glyphs = <_Glyph>[
+  _Glyph(
+    'minimize',
+    (b) => WindowCaptionButton.minimize(brightness: b, onPressed: () {}),
+    const [Offset(8, 7.5), Offset(4, 7.5), Offset(12, 7.5)],
+    const [Offset(8, 5), Offset(8, 9), Offset(2, 7.5)],
+  ),
+  _Glyph(
+    'maximize',
+    (b) => WindowCaptionButton.maximize(brightness: b, onPressed: () {}),
+    const [Offset(8, 3.5), Offset(3.5, 8), Offset(12.5, 8), Offset(8, 12.5)],
+    // The center of the frame is a hole.
+    const [Offset(8, 8), Offset(1, 1), Offset(15, 15)],
+  ),
+  _Glyph(
+    'unmaximize',
+    (b) => WindowCaptionButton.unmaximize(brightness: b, onPressed: () {}),
+    // Front frame edges and the back frame's top edge.
+    const [Offset(3.5, 9), Offset(7, 12.5), Offset(8, 3.5)],
+    // Inside the front frame.
+    const [Offset(7, 9), Offset(1, 1)],
+  ),
+  _Glyph(
+    'close',
+    (b) => WindowCaptionButton.close(brightness: b, onPressed: () {}),
+    const [Offset(8, 8), Offset(5, 5), Offset(11, 5), Offset(5, 11)],
+    const [Offset(8, 4), Offset(4, 8), Offset(12, 8), Offset(8, 12)],
+  ),
+];
+
+Widget _host(Widget button) => MaterialApp(
+  home: Center(child: UnconstrainedBox(child: button)),
+);
+
+Finder get _iconPaint => find.descendant(
+  of: find.byType(WindowCaptionButtonIcon),
+  matching: find.byType(CustomPaint),
+);
+
+void main() {
+  for (final glyph in _glyphs) {
+    testWidgets('${glyph.name} glyph keeps its geometry in both themes', (
+      tester,
+    ) async {
+      for (final brightness in Brightness.values) {
+        await tester.pumpWidget(_host(glyph.create(brightness)));
+        final color = tester
+            .widget<WindowCaptionButtonIcon>(
+              find.byType(WindowCaptionButtonIcon),
+            )
+            .color;
+        expect(
+          _iconPaint,
+          paints..path(
+            color: color,
+            style: PaintingStyle.fill,
+            includes: glyph.includes,
+            excludes: glyph.excludes,
+          ),
+        );
+      }
+    });
+
+    testWidgets('${glyph.name} glyph Path is reused across repaints', (
+      tester,
+    ) async {
+      final drawn = <ui.Path>[];
+      for (final brightness in [...Brightness.values, Brightness.light]) {
+        await tester.pumpWidget(_host(glyph.create(brightness)));
+        expect(
+          _iconPaint,
+          paints..something((method, arguments) {
+            if (method != #drawPath) return false;
+            drawn.add(arguments[0] as ui.Path);
+            return true;
+          }),
+        );
+      }
+      expect(drawn, hasLength(3));
+      expect(identical(drawn[0], drawn[1]), isTrue);
+      expect(identical(drawn[1], drawn[2]), isTrue);
+    });
+  }
+
+  testWidgets('glyph types do not share a cached Path', (tester) async {
+    final drawn = <ui.Path>{};
+    for (final glyph in _glyphs) {
+      await tester.pumpWidget(_host(glyph.create(Brightness.light)));
+      expect(
+        _iconPaint,
+        paints..something((method, arguments) {
+          if (method != #drawPath) return false;
+          drawn.add(arguments[0] as ui.Path);
+          return true;
+        }),
+      );
+    }
+    expect(drawn, hasLength(_glyphs.length));
+  });
+}