Re: Re: Resulting class performance

On 5/7/2010 3:57 PM, Scott Vachalek wrote:
> Look up "Java vs. C++ performance" to see all the problems that can 
> occur with this sort of micro-benchmark.  It could all come down to 
> differences in measurement (whether both VMs are running in the same 
> mode, whether startup time is counted, etc. etc.)  But off the top of 
> my head, I would try replacing that ldc with an iconst.  I'd be 
> surprised if the JIT doesn't produce equivalent code in both cases but 
> that seems to be the most prominent difference.

I understand micro benchmarks are bad and very deceiving but I also 
understand that I should be able to achieve the same performance as 
Java. If something as fundamental as my loop construct is wrong, it can 
have drastic effects on every part of the language and since one takes 3 
seconds and the other 250 ms, I was thinking something is wrong. If one 
was 250 ms and the other 270 ms, I would have kept on chugging along.

BTW... The difference between the existing Josl interpreter and the new 
JVM target was not my real concern. The concern was the Java compiled 
code was 2 3/4 seconds faster on a 3 second long test.

Jeremy

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