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SubjectRe: Faster depend written in Perl
Date
Ian Burrell <iburrell@leland.stanford.edu> writes:

> I have an old 386/33 and running 'make depend' takes a long time.

Upgrade! 486 motherboards with CPU are so cheap that there is no
excuse.

> I heard this was because gawk uses floating point instead of integer
> arithmetic. To speed things up, I translated the depend.awk script
> into Perl using the a2p program. I edited the result to clean up
> the code. The resulting script runs much faster (up to an order of
> magnitude on my machine without a coprocessor) either because of
> integer arithmetic or Perl's faster I/O.

It runs 25% faster on my P-90 (it's mostly I/O bound), but I'm not
complaining. It might be possible to tweak the translation a bit
more.

You might try also mawk instead of gawk. gawk is slow. Running the
script with mawk was 36% faster than gawk.

Defaulting to the perl version is probably better since most people
don't have mawk.

Dan

--
Daniel Quinlan Member of the League for Programming Freedom
quinlan@bucknell.edu


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