[armedbear-devel] Significant increase in build time

Erik Huelsmann ehuels at gmail.com
Wed Oct 6 21:17:11 UTC 2010


Before going to bed, I did a quick test - as discussed over GMail chat
- to see how much they differ in compilation times on other software.

timing new code, Maxima compilation: 223.416s, loading: 25.8
timing old code, Maxima compilation: 204.063s, loading: 29.174

I have no idea of the variation of the Maxima compilation times; it
looks like the new code is 10% slower at compiling, but 20% more
efficient at loading. However, these were single runs, so my
conclusions may be way off, depending on the variations.



On Tue, Oct 5, 2010 at 5:52 PM, Blake McBride <blake at mcbride.name> wrote:
> Greetings,
> I hadn't built ABCL in a little while so I checked out the latest
> version today and built it.  It seemed to be significantly slower than
> before so I decided to investigate.  This is what I found.
> In the past I could build ABCL in 2:43.  It now takes me 4:40.  That
> (IMO) represents a pretty significant change in build time.  I did a
> binary search and discovered that all of the change occurred at
> revision 12918 - Generic Class File Branch Merge.
> In general, I could't care less about the build time unless it is
> indicative of a problem that could rear its head in my application.
> Where is that time being spent?  Is there a change in runtime?
> Loading? Compiling?
> I'd be real interested in this.
> Thanks.
> Blake McBride
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