From b54df05569c3a48ad6341d4844e323aa9b7fce55 Mon Sep 17 00:00:00 2001
From: Stephen Vaudreuil <55300279+PvtPuddles@users.noreply.github.com>
Date: Fri, 15 May 2026 09:15:23 -0400
Subject: [PATCH] Improved performance of
 `LineChartPainter.getNearestTouchedSpot`

---
 .../chart/line_chart/line_chart_painter.dart   | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/lib/src/chart/line_chart/line_chart_painter.dart b/lib/src/chart/line_chart/line_chart_painter.dart
index 3932f6d3c..6b10bb51b 100644
--- a/lib/src/chart/line_chart/line_chart_painter.dart
+++ b/lib/src/chart/line_chart/line_chart_painter.dart
@@ -1385,7 +1385,7 @@ class LineChartPainter extends AxisChartPainter<LineChartData> {
     }
 
     /// Find the nearest spot (based on distanceCalculator)
-    final sortedSpots = <FlSpot>[];
+    FlSpot? nearestSpot;
     double? smallestDistance;
     for (final spot in barData.spots) {
       if (spot.isNull()) continue;
@@ -1398,22 +1398,24 @@ class LineChartPainter extends AxisChartPainter<LineChartData> {
       );
 
       if (distance <= data.lineTouchData.touchSpotThreshold) {
-        smallestDistance ??= distance;
+        if (nearestSpot == null) {
+          nearestSpot = spot;
+          smallestDistance = distance;
+          continue;
+        }
 
-        if (distance < smallestDistance) {
-          sortedSpots.insert(0, spot);
+        if (distance < smallestDistance!) {
+          nearestSpot = spot;
           smallestDistance = distance;
-        } else {
-          sortedSpots.add(spot);
         }
       }
     }
 
-    if (sortedSpots.isNotEmpty) {
+    if (nearestSpot != null) {
       return TouchLineBarSpot(
         barData,
         barDataPosition,
-        sortedSpots.first,
+        nearestSpot,
         smallestDistance!,
       );
     } else {