Re: XML Serialization Performance

It also appears to be a performance problem from within VS too.  I decided
to run the benchmarks again to see what the actual time is:

JDK 7 finishes in 0.4 seconds
Inside of VS with release build 12 seconds
Same code but run on command line 1.5 seconds.

I wonder if VS is still instrumenting the Release code and thus causing the
order of magnitude speed difference...


On Wed, Feb 4, 2015 at 12:24 PM, Michael Kay <[email protected]> wrote:

> For Saxon, many years ago, we used to say that the product ran about 30%
> slower under IKVM on .NET than in native Java. These days we're seeing a
> much bigger difference; .NET is often three times slower. We've done a lot
> of work to try and isolate the reasons, but we've come to the conclusion
> that the Sun/Oracle JDK has simply got better and IKVM/.NET hasn't kept
> pace.
>
> Michael Kay
> Saxonica
> [email protected]
> +44 (0) 118 946 5893
>
>
>
>
> On 4 Feb 2015, at 15:58, Hank Grabowski <[email protected]> wrote:
>
> First, I wanted to say that the IKVM software is a godsend.  It is often
> the case that one has to pick either a MS or a Java stack when you really
> need both.  This gives a third way, where you can build in Java and use in
> .NET.
>
> I've seen the performance benchmarks on your blog and it looks like there
> are many test suites where you are getting good performance. However I'm
> seeing some cases where things run an order of magnitude slower than in the
> JVM directly.  One of the most recent one was in XML
> serialization/deserialization using the built in JAXB providers.  I'd have
> to pull up the timing numbers again but if I recall correctly it was
> something like under a second inside of the JVM and over 10 seconds to
> parse the same file in C#.  Are there any known performance caveats that I
> should read up on?  Would there be interest in performing test cases and
> trying to isolate the problem on my side?  Is that then something that
> you'd like to have code contributed back or just the test cases so that the
> IKVM core development team could look at?
>
> Thanks again for a great piece of technology!
>
> Hank
>
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