Re: [Chicken-users] String compression?

[Graham Fawcett]

On 12/21/06, Zbigniew <address@hidden> wrote:
> Number 2 thing is that gzip-string (on my system) does not take 0.888
> seconds real-time to execute.  That's just what chicken reports.  If
> you comment out the other tests and actually run the script from the
> command line using 'time', it takes -substantially- longer: 7.9s!  I
> expect this on OS X because it is notoriously slow at forking new
> processes; it may be a lot faster on e.g. Linux.  However, the point
> is, only the time for Chicken itself is being measured, not for gzip.

You're absolutely right, Zbigniew. Even on Linux, the real time for
gzip is much greater than I reported. (I'm not sure how I watched the
test run, and didn't pick up on that...)

1000 runs of gzip-string:
real    0m8.923s
user    0m4.500s
sys     0m4.600s

1000 runs of z3:compress-string:
real    0m14.548s
user    0m14.450s
sys     0m0.090s

Sorry everyone. Forking a gzip process is still clearly faster on
Linux (for me, at least), but not nearly by the margin I had
suggested.

Looking forward to the compress/decompress-the-whole-buffer routines, Felix :-)

Graham