update: sample for listFiles().size vs count().

Author: ItzNotABug

app/src/main/java/com/lazygeniouz/filecompat/example/performance/DirectoryPerformance.kt

@@ -24,7 +24,10 @@ object DirectoryPerformance {
         results += "Fetching only Uris will always be faster (after File)" + "\nBut try fetching the Documents' Names.\n\n"
         results += calculateDocumentFileCompatPerformanceWithName(context, uri) + "\n"
         results += calculateDocumentFilePerformanceOnlyUri(context, uri) + "\n"
-        results += calculateDocumentFilePerformanceWithName(context, uri)
+        results += calculateDocumentFilePerformanceWithName(context, uri) + "\n\n"
+
+        results += "=".repeat(48).plus("\n\n")
+        results += calculateCountVsListSize(context, uri)
         return results
     }
 
@@ -141,4 +144,25 @@ object DirectoryPerformance {
             return ("DFC Performance (With Names) = ${time}s")
         }
     }
+
+    private fun calculateCountVsListSize(context: Context, uri: Uri): String {
+        val documentFile = DocumentFileCompat.fromTreeUri(context, uri)
+            ?: return "Failed to access directory"
+
+        val dfListSizeTime = measureTimeSeconds {
+            DocumentFile.fromTreeUri(context, uri)?.listFiles()?.size
+        }
+
+        val dfcCountTime = measureTimeSeconds {
+            documentFile.count()
+        }
+
+        val dfcListSizeTime = measureTimeSeconds {
+            documentFile.listFiles().size
+        }
+
+        return "DocumentFile.listFiles().size = ${dfListSizeTime}s\n" +
+                "DFC count() Performance = ${dfcCountTime}s\n" +
+                "DFC listFiles().size Performance = ${dfcListSizeTime}s"
+    }
 }

app/src/main/java/com/lazygeniouz/filecompat/example/performance/ProjectionPerformance.kt

@@ -3,6 +3,7 @@ package com.lazygeniouz.filecompat.example.performance
 import android.content.Context
 import android.net.Uri
 import android.provider.DocumentsContract.Document
+import androidx.documentfile.provider.DocumentFile
 import com.lazygeniouz.dfc.file.DocumentFileCompat
 import com.lazygeniouz.filecompat.example.performance.Performance.measureTimeSeconds
 
@@ -25,6 +26,11 @@ object ProjectionPerformance {
 
         results += "=".repeat(48).plus("\n\n")
 
+        // Test 4: count() vs listFiles().size
+        results += testCountVsListSize(context, uri) + "\n\n"
+
+        results += "=".repeat(48).plus("\n\n")
+
         return results
     }
 
@@ -91,4 +97,26 @@ object ProjectionPerformance {
                     "Time: ${time}s"
         }
     }
+
+    private fun testCountVsListSize(context: Context, uri: Uri): String {
+        val documentFile = DocumentFileCompat.fromTreeUri(context, uri)
+            ?: return "Failed to access directory"
+
+        val dfListSizeTime = measureTimeSeconds {
+            DocumentFile.fromTreeUri(context, uri)?.listFiles()?.size
+        }
+
+        val dfcCountTime = measureTimeSeconds {
+            documentFile.count()
+        }
+
+        val dfcListSizeTime = measureTimeSeconds {
+            documentFile.listFiles().size
+        }
+
+        return "count() vs listFiles().size:\n\n" +
+                "DocumentFile.listFiles().size = ${dfListSizeTime}s\n" +
+                "DFC.count() = ${dfcCountTime}s\n" +
+                "DFC.listFiles().size = ${dfcListSizeTime}s"
+    }
 }