Optimizing using precompiled Perl program?

[Yash]

We have a compute-intensive Perl program that needs optimization. We
have done whatever we could on the algorithm front. Would it give any
performnace improvement if we convert the program to bytecode using:
perl -MO=Bytecode[,-H][,-oscript.plc] script.pl

We are looking for overall runtime performance improvement and not
just initial load-time improvement.

Can you suggest anything else for further optimization?

Thanks

 

[Randal L. Schwartz]

Yash> We have a compute-intensive Perl program that needs optimization. We
Yash> have done whatever we could on the algorithm front. Would it give any
Yash> performnace improvement if we convert the program to bytecode using:
Yash> perl -MO=Bytecode[,-H][,-oscript.plc] script.pl

Yash> We are looking for overall runtime performance improvement and not
Yash> just initial load-time improvement.

No. In fact, that might make your program run slower. Perl's
already at full speed by the time it's running.

Yash> Can you suggest anything else for further optimization?

Have you *really* used the profiling tools?

Have you started to Inline::C the hotspots?

Have you considered using PDL (in the CPAN) for your complex
data structures?

print "Just another Perl hacker,"; # the first (or is it 0th?)

 

[Anno Siegel]

We have a compute-intensive Perl program that needs optimization. We
have done whatever we could on the algorithm front. Would it give any
performnace improvement if we convert the program to bytecode using:
perl -MO=Bytecode[,-H][,-oscript.plc] script.pl

We are looking for overall runtime performance improvement and not
just initial load-time improvement.

Can you suggest anything else for further optimization?

Profile it to find possible hot spots. Devel:prof is the tool.

Anno

 

[ctcgag]

We have a compute-intensive Perl program that needs optimization. We
have done whatever we could on the algorithm front. Would it give any
performnace improvement if we convert the program to bytecode using:
perl -MO=Bytecode[,-H][,-oscript.plc] script.pl

We are looking for overall runtime performance improvement and not
just initial load-time improvement.

Can you suggest anything else for further optimization?

Profile it to find possible hot spots. Devel:prof is the tool.

I often find Devel::SmallProf more useful, especially for smaller projects.
Usually I already know what sub is consuming the time, and I want to know
which line within the sub is the hog.

Xho