[Soot-list] strange performance issue: slower on 4-Core CPU than on a dual-Core CPU

[Patrick Lam]

On 24/06/11 06:09 AM, Ding Sun wrote:
> Dear All
>
> Recently I encountered a strange problem. I wrote a programming for
> static path analysis using Soot Jimple API. The first step is to load
> sample classes by using:
>
> Scene./v/().loadNecessaryClasses();
>
> On an older PC with dual-Core (Intel Core2 Duo E6750 2.66GHz @ 2.7 GHz,
> 3GB System RAM), this step normally cost 5--10 seconds. However, when I
> moved the program to a better PC with 4-Core(Intel Core2 Q8200 2.33GHz @
> 2.3 GHz,3GB System RAM), this step cost nearlly 2-3 minutes and
> sometimes even hang on for more than 5 minutes.

I bet you're using a different Java VM on the two machines, and the 
older PC has an old JVM as well, which is much faster to analyze. If you 
install the same JVM on the two machines, or use the same 
soot-class-path, you should get more normal results.

pat