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Re: Benchmarking Simple Perl program vs. Java equivalent

by Krambambuli (Deacon)
on Jun 19, 2010 at 11:25 UTC ( #845527=note: print w/ replies, xml ) Need Help??

in reply to Benchmarking Simple Perl program vs. Java equivalent

I'm too much of a Java-ignorant to be able to pinpoint the 'real' differences here, but it seems to me that the Java-hashlike construct you're using is quite a different beast than Perl's hashes.

Whereas in Perl you have real arrays of real hashes, and the hashes deep down there _do have_ _stored_ keys _and_ stored values, I somewhat miss the hash keys in the Java code - but I might be wrong.

Obviously, if the basic underlying data structures used in Perl are indeed much more sophisticated/complicated than what's there for it in Java - despite their 'almost alikeness' - the processing time will reflect this difference between the structures used.

Update By rewriting the core of your Perl code as

if ( $gene_to < $gene_from ) { # split # low range first $temp_gene_to_legal_range = [ # { FROM => 0, TO => $ge +ne_to }, # { # FROM => $gene_ +from, # TO => $zone_ +o->{_chromosome_length} # } 0, $gene_to, $gene_from, $zo +ne_o->{_chromosome_length} ]; } else { # single $temp_gene_to_legal_range = # [ { FROM => $gene_from, TO +=> $gene_to } ]; [ $gene_from, $gene_to ] }
the time displayed goes down on my machine from approx. 14.5 to 11.4. Might be that that's another path to follow.

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