From 34630c671e826ed871e5cf4beb37e79c343cd3c7 Mon Sep 17 00:00:00 2001
From: Vishesh Handa <me@vhanda.in>
Date: Sat, 26 Sep 2020 00:36:58 +0200
Subject: [PATCH] Node: cache the label

Computing the path spec again and again is apparently very very
expensive.
---
 lib/core/graph.dart | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/core/graph.dart b/lib/core/graph.dart
index cf458648..10b3d492 100644
--- a/lib/core/graph.dart
+++ b/lib/core/graph.dart
@@ -17,9 +17,14 @@ class Node {
   double forceX = 0.0;
   double forceY = 0.0;
 
+  String _label;
+
   Node(this.note);
 
-  String get label => note.pathSpec();
+  String get label {
+    _label ??= note.pathSpec();
+    return _label;
+  }
 
   @override
   String toString() => "Node{$label, $x, $y}";