"Frank Snow" <fsnow@fsnow.com> wrote in message
news:9b72e465.0406281047.10e6fd3e@posting.google.com...
>I have an application that allocates a large number of strings using
> the String(byte[] bytes, int offset, int length) constructor. A simple
> test case shows that string allocation is between one and two orders
> of magnitude slower in J# relative to JVM 1.4.
>
> Here's the code:
>
> int dataLength = 200000;
> int numStrings = 6000;
> int strLength = 100;
> int offsetIncrement = (dataLength - strLength) / numStrings;
> byte[] data = new byte[dataLength];
> new Random().nextBytes(data);
> String[] strs = new String[numStrings];
> long start = System.currentTimeMillis();
> int j = 0;
> for (int i = 0; i < numStrings; i++)
> {
> strs[i] = new String(data, j, strLength);
> j += offsetIncrement;
> }
> long end = System.currentTimeMillis();
> long duration = end - start;
> System.out.println("Elapsed time: " + new Long(duration).toString());
>
>
> JVM 1.4: 160 ms
> J#: 11086 ms
>
>
> Has anyone seen this before?
>
> FS