David,
For me 1.5 and 1.6 perform about the same...1.6 is a little faster.
However, -server yields the surprisingly fast results that you are seeing
under 1.6 and -client yields the slow results that you are seeing under 1.5.
It still doesn't explain why it's so fast...but it's another data point.
I'm using an ancient computer with Linux.
-Erik
On Nov 30, 2007 5:49 PM, David Pollak <[EMAIL PROTECTED]> wrote:
> I've got the following Scala code:
> object Foo {
> def main(argv: Array[String]) {
> var bits = 0L
> val start = System.currentTimeMillis()
> var n = 2000000001
> // var n = 2000000001L // makes things very slow
> while (n > 0) {
> bits = bits ^ (1 << 5)
> n = n - 1
> }
> System.out.println(bits)
> val end = System.currentTimeMillis()
> System.out.println(end-start)
> }
> }
>
> I'm enclosing the source and the bytecode.
>
> There are 2B iterations.
>
> On my Core 2 Quad running JDK 1.6 (32 bit), the code takes 2 ms to run.
>
> On my Mac Book Pro (Core Duo, JDK 1.5) it takes 6,600 ms.
>
> The run time on the Mac seems more "reasonable". What's going on?
>
>
>
> --
> lift, the secure, simple, powerful web framework http://liftweb.net
> Collaborative Task Management http://much4.us
> >
>
--
http://erikengbrecht.blogspot.com/
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