Speeding up sbuild / PPA / distro builds (optiPNG)

Adam Conrad adconrad at ubuntu.com
Sat Jun 22 01:59:42 UTC 2013

On Fri, Jun 21, 2013 at 07:46:51PM -0600, Adam Conrad wrote:
> On Fri, Jun 21, 2013 at 11:22:47PM +0200, Michał Sawicz wrote:
> > 
> > Because of -o7 (slowest) we saved another 112kB, or 2%. Then, added
> > export NO_PNG_PKG_MANGLE=1 to debian/rules and voilá! that's a _lot_ of
> > our pandas' time saved.
> Please don't upload packages to the archive with NO_PNG_PKG_MANGLE set,
> optimizing PNGs isn't the only thing it does.  Maybe we should have a
> second flag just for turning off PNG optimization, but the better answer
> for many (admittedly, not all) packages is to split PNGs into arch-indep
> packages, so they only build on i386.

It's been pointed out that I can't read.  I saw NO_PNG_PKG_MANGLE as
NO_PKG_MANGLE, completely failing to notice that NO_PNG_PKG_MANGLE is
actually a real thing (thanks, Martin).

Ignore me.  If you want to pre-optimize your PNGs and set the above
variable, by all means: do so.  Forget the noise. :P

... Adam

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