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From: markspace <-@.>
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Subject: Re: alias for Integer
Date: Fri, 18 Nov 2011 07:11:51 -0800
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On 11/18/2011 6:50 AM, jrobinss wrote:
>
> 3. is there any
> performance issue in defining my own classes instead of Integer?


To me yes, there is a performance issue, and you should definitely 
consider using something besides Integer and Map for this.


> Note that (exceptionnally for me) performance *is* an issue here. I
> haven't yet narrowed it down, but the code executes very slowly and
> eats up much too much memory at the moment. I'm starting to optimize
> it, that's why I'm starting with strongly typing it to prevent
> errors.


Good, you're doing this the right way.  You should look into profiling 
your code.  NetBeans has an excellent profiler built in, and will handle 
most "user made" projects as well as its own format.  You should look 
into it.

The most important thing is to pinpoint where the code is slow and work 
on those bits.  I suspect that auto-boxing and unboxing is costing you 
too much time, but I couldn't prove it.  The profiler could.