add big file test to cellfs

tests/cellfs.ce

@@ -5,6 +5,7 @@ var cellfs = use('cellfs')
 var io = use('io')
 var time = use('time')
 var json = use('json')
+var blob = use('blob')
 
 log.console("CellFS vs IO Performance Test")
 log.console("=================================")
@@ -32,7 +33,7 @@ for (var i = 0; i < io_paths.length; i++) {
   }
 }
 
-io.slurpwrite(test_content, test_file)
+io.slurpwrite(test_file, test_content)
 
 // Verify both systems have the same search paths
 log.console(`IO search paths: ${json.encode(io.searchpath())}`)
@@ -136,9 +137,43 @@ log.console(`CellFS ZIP read (100 iterations): ${cellfs_time}ms`)
 speedup = io_time / cellfs_time
 log.console(`CellFS is ${speedup.toFixed(2)}x ${speedup > 1 ? "faster" : "slower"} than IO for ZIP reading`)
 
+// Test large file operations
+log.console("\nTesting large file operations...")
+
+var large_file = "large_test.bin"
+var size_mb = 10
+var size_bits = size_mb * 1024 * 1024 * 8
+log.console(`Creating ${size_mb}MB large file...`)
+
+var blob = new blob(size_bits, function() { return Math.floor(Math.random() * (1 << 52)) })
+stone(blob)
+io.slurpwrite(large_file, blob)
+
+log.console("Testing large file reading...")
+
+// Test io.slurpbytes
+start_time = time.number()
+for (var i = 0; i < 10; i++) {
+  var large_content = io.slurpbytes(large_file)
+}
+io_time = time.number() - start_time
+log.console(`IO large file read (10 iterations): ${io_time}ms`)
+
+// Test cellfs.slurpbytes
+start_time = time.number()
+for (var i = 0; i < 10; i++) {
+  var large_content = cellfs.slurpbytes(large_file)
+}
+cellfs_time = time.number() - start_time
+log.console(`CellFS large file read (10 iterations): ${cellfs_time}ms`)
+
+speedup = io_time / cellfs_time
+log.console(`CellFS is ${speedup.toFixed(2)}x ${speedup > 1 ? "faster" : "slower"} than IO for large file reading`)
+
 // Cleanup
-//io.rm(test_file)
-//io.rm("test_archive.zip")
+io.rm(test_file)
+io.rm("test_archive.zip")
+io.rm(large_file)
 //io.unmount("/test_zip")
 //cellfs.unmount("/test_zip")
 
@@ -152,3 +187,5 @@ for (var path of io_paths) {
 }
 
 log.console("\nTest completed!")
+
+$_.stop()