> -----Original Message-----
> From: java-dev-bounces+rgenter=email@hidden
[mailto:java-dev-bounces+rgenter=email@hidden] On Behalf Of
William Groppe
> Sent: Friday, July 29, 2005 3:56 AM
> To: email@hidden
> Subject: Mac OS X File IO Performance Issue?
>
> private long testStraightFileIO(File fileToTest) throws Exception {
> byte[] buffer = new byte[new
Long(fileToTest.length()).intValue()];
> FileInputStream fis = new FileInputStream(fileToTest);
> testStart = System.currentTimeMillis();
> int bytesRead = 0;
> int read = fis.read(buffer, 0, buffer.length);
> bytesRead += read;
> while(bytesRead < buffer.length && read != -1) {
> read = fis.read(buffer, bytesRead, buffer.length - bytesRead);
> bytesRead += read;
> }
> System.out.println("bytes read:"+bytesRead);
> testEnd = System.currentTimeMillis();
> return (testEnd - testStart);
> }
One obvious change to make here: *don't* call System.out.println() *before*
getting your end time. Otherwise you're timing the time it takes to write
your "bytes read:" message to whatever stream System.out is pointing to
(file, console, whatever).
Rick
--
Rick Genter
email@hidden
(781) 771-9677
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