From 64d9718c3404781723cecd41b9d0574d9d6d1e02 Mon Sep 17 00:00:00 2001
From: Kanglai Qian <qiankanglai@users.noreply.github.com>
Date: Sat, 21 May 2022 21:10:02 +0800
Subject: [PATCH] avoid useless search for non exist files (#967)

---
 AssetStudio/AssetsManager.cs | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/AssetStudio/AssetsManager.cs b/AssetStudio/AssetsManager.cs
index 9128620..5dc3152 100644
--- a/AssetStudio/AssetsManager.cs
+++ b/AssetStudio/AssetsManager.cs
@@ -17,6 +17,7 @@ namespace AssetStudio
         internal Dictionary<string, BinaryReader> resourceFileReaders = new Dictionary<string, BinaryReader>(StringComparer.OrdinalIgnoreCase);
 
         private List<string> importFiles = new List<string>();
+        private List<string> noexistFiles = new List<string>();
         private HashSet<string> importFilesHash = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         private HashSet<string> assetsFileListHash = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
 
@@ -54,6 +55,7 @@ namespace AssetStudio
 
             importFiles.Clear();
             importFilesHash.Clear();
+            noexistFiles.Clear();
             assetsFileListHash.Clear();
 
             ReadAssets();
@@ -110,19 +112,26 @@ namespace AssetStudio
                         if (!importFilesHash.Contains(sharedFileName))
                         {
                             var sharedFilePath = Path.Combine(Path.GetDirectoryName(reader.FullPath), sharedFileName);
-                            if (!File.Exists(sharedFilePath))
+                            if (!noexistFiles.Contains(sharedFilePath))
                             {
-                                var findFiles = Directory.GetFiles(Path.GetDirectoryName(reader.FullPath), sharedFileName, SearchOption.AllDirectories);
-                                if (findFiles.Length > 0)
+                                if (!File.Exists(sharedFilePath))
                                 {
-                                    sharedFilePath = findFiles[0];
+                                    var findFiles = Directory.GetFiles(Path.GetDirectoryName(reader.FullPath), sharedFileName, SearchOption.AllDirectories);
+                                    if (findFiles.Length > 0)
+                                    {
+                                        sharedFilePath = findFiles[0];
+                                    }
                                 }
-                            }
 
-                            if (File.Exists(sharedFilePath))
-                            {
-                                importFiles.Add(sharedFilePath);
-                                importFilesHash.Add(sharedFileName);
+                                if (File.Exists(sharedFilePath))
+                                {
+                                    importFiles.Add(sharedFilePath);
+                                    importFilesHash.Add(sharedFileName);
+                                }
+                                else
+                                {
+                                    noexistFiles.Add(sharedFilePath);
+                                }
                             }
                         }
                     }