Use map to quickly find childrens in BuildTreeFromFiles

pkg/gui/filetree/build_tree.go

@@ -10,6 +10,8 @@ import (
 func BuildTreeFromFiles(files []*models.File) *Node[models.File] {
 	root := &Node[models.File]{}
 
+	childrenMapsByNode := make(map[*Node[models.File]]map[string]*Node[models.File])
+
 	var curr *Node[models.File]
 	for _, file := range files {
 		splitPath := split(file.Name)
@@ -23,19 +25,28 @@ func BuildTreeFromFiles(files []*models.File) *Node[models.File] {
 			}
 
 			path := join(splitPath[:i+1])
-			for _, existingChild := range curr.Children {
-				if existingChild.Path == path {
-					curr = existingChild
-					continue outer
-				}
+
+			var childrenMap map[string]*Node[models.File]
+			var ok bool
+			if childrenMap, ok = childrenMapsByNode[curr]; !ok {
+				childrenMap = make(map[string]*Node[models.File])
+				childrenMapsByNode[curr] = childrenMap
+			}
+			child, isFound := childrenMap[path]
+			if isFound {
+				curr = child
+				continue outer
 			}
 
 			newChild := &Node[models.File]{
 				Path: path,
 				File: setFile,
 			}
+
 			curr.Children = append(curr.Children, newChild)
 
+			childrenMap[path] = newChild
+
 			curr = newChild
 		}
 	}