diff --git a/memory-vault/src/main/java/com/memoryvault/BackupManager.kt b/memory-vault/src/main/java/com/memoryvault/BackupManager.kt
index 050178a0..19f7b975 100644
--- a/memory-vault/src/main/java/com/memoryvault/BackupManager.kt
+++ b/memory-vault/src/main/java/com/memoryvault/BackupManager.kt
@@ -75,6 +75,16 @@ class BackupManager(private val vaultFile: File) {
             backupSize = restoredSize
         )
     }
+
+    suspend fun cleanupOldBackups(backupDir: File, maxBackups: Int) = withContext(Dispatchers.IO) {
+        val backups = backupDir.listFiles { file ->
+            file.name.startsWith("vault_") && file.name.endsWith(".mvlt.gz")
+        }?.sortedByDescending { it.lastModified() } ?: return@withContext
+
+        if (backups.size > maxBackups) {
+            backups.drop(maxBackups).forEach { it.delete() }
+        }
+    }
 }
 
 data class BackupResult(
diff --git a/memory-vault/src/test/java/com/memoryvault/BackupManagerBenchmark.kt b/memory-vault/src/test/java/com/memoryvault/BackupManagerBenchmark.kt
new file mode 100644
index 00000000..75217ec1
--- /dev/null
+++ b/memory-vault/src/test/java/com/memoryvault/BackupManagerBenchmark.kt
@@ -0,0 +1,33 @@
+package com.memoryvault
+
+import kotlinx.coroutines.runBlocking
+import org.junit.Test
+import java.io.File
+import kotlin.system.measureTimeMillis
+
+class BackupManagerBenchmark {
+
+    @Test
+    fun benchmarkCleanup() {
+        runBlocking {
+            val tempDir = File(System.getProperty("java.io.tmpdir"), "backup_benchmark")
+            tempDir.mkdirs()
+
+            // Create 30000 dummy backup files
+            for (i in 1..30000) {
+                val file = File(tempDir, "vault_backup_$i.mvlt.gz")
+                file.createNewFile()
+            }
+
+            val manager = BackupManager(File("dummy"))
+
+            val time = measureTimeMillis {
+                manager.cleanupOldBackups(tempDir, 10)
+            }
+
+            // Print to standard error as it might bypass gradle's output buffering
+            System.err.println("Baseline Cleanup Time: $time ms")
+            tempDir.deleteRecursively()
+        }
+    }
+}