| Methods Summary |
|---|
| public static void | bufferedInputStreamCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
BufferedInputStream rdr = new BufferedInputStream(new FileInputStream(f1), 16*1024);
BufferedOutputStream wrtr = new BufferedOutputStream(new FileOutputStream(f2), 16*1024);
int c;
while( (c = rdr.read()) != -1)
{
wrtr.write(c);
}
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" bufferedInputStreamCopy time: " + time);
|
| public static void | bufferedReaderCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
BufferedReader rdr = new BufferedReader(new FileReader(f1), 16*1024);
BufferedWriter wrtr = new BufferedWriter(new FileWriter(f2), 16*1024);
int c;
while( (c = rdr.read()) != -1)
{
wrtr.write(c);
}
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" bufferedReaderCopy time: " + time);
|
| public static void | directBufferCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
ByteBuffer buffer = ByteBuffer.allocateDirect(16*1024);
FileChannel rdr = (new FileInputStream(f1)).getChannel();
FileChannel wrtr = (new FileOutputStream(f2)).getChannel();
while( rdr.read(buffer) > 0)
{
buffer.flip();
wrtr.write(buffer);
buffer.clear();
}
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" directBufferCopy time: " + time);
|
| public static void | directTransferCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
FileChannel rdr = (new FileInputStream(f1)).getChannel();
FileChannel wrtr = (new FileOutputStream(f2)).getChannel();
rdr.transferTo(0, (int) rdr.size(), wrtr);
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" directTransferCopy time: " + time);
|
| public static void | explicitBufferInputStreamCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
byte[] buffer = new byte[1024*16];
FileInputStream rdr = new FileInputStream(f1);
FileOutputStream wrtr = new FileOutputStream(f2);
int readLen;
while( (readLen = rdr.read(buffer)) != -1)
{
wrtr.write(buffer, 0, readLen);
}
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" explicitBufferInputStreamCopy time: " + time);
|
| public static void | main(java.lang.String[] args)
String f1 = args[0];
String f2 = args[1];
test(f1,f2);
test(f1,f2+'a");
|
| public static void | mappedBufferCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
FileChannel rdr = (new FileInputStream(f1)).getChannel();
FileChannel wrtr = (new FileOutputStream(f2)).getChannel();
ByteBuffer buffer = rdr.map(FileChannel.MapMode.READ_ONLY, 0, (int) rdr.size());
wrtr.write(buffer);
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" mappedBufferCopy time: " + time);
|
| public static void | nonDirectBufferCopy(java.lang.String f1, java.lang.String f2)
long time = System.currentTimeMillis();
ByteBuffer buffer = ByteBuffer.allocate(16*1024);
FileChannel rdr = (new FileInputStream(f1)).getChannel();
FileChannel wrtr = (new FileOutputStream(f2)).getChannel();
while( rdr.read(buffer) > 0)
{
buffer.flip();
wrtr.write(buffer);
buffer.clear();
}
rdr.close();
wrtr.close();
time = System.currentTimeMillis() - time;
System.out.println(" nonDirectBufferCopy time: " + time);
|
| public static void | test(java.lang.String f1, java.lang.String f2)
bufferedReaderCopy(f1, f2+'1");
bufferedInputStreamCopy(f1, f2+'2");
explicitBufferInputStreamCopy(f1, f2+'3");
nonDirectBufferCopy(f1, f2+'4");
directBufferCopy(f1, f2+'5");
mappedBufferCopy(f1, f2+'6");
directTransferCopy(f1, f2+'7");
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