Hi Jason, * Jason Sewall wrote on Sun, Nov 01, 2009 at 06:28:31PM CET: > On Sun, Nov 1, 2009 at 6:45 AM, Ralf Wildenhues wrote: > > > > Is anyone using it? Has anyone seen issues with it? > > I didn't even know it existed, but I just tried it out and it seems to > generate correct output for a project I have with 12 Makefile.am > files. I have a quad core machine and set AUTOMAKE_JOBS=4. > > The performance gains are fairly small, however: > $ AUTOMAKE_JOBS=1 time automake > 1.31user 0.19system 0:01.51elapsed 100%CPU > > $ AUTOMAKE_JOBS=4 time automake > 1.62user 0.24system 0:01.14elapsed 163%CPU
Yeah, the perl thread spawning really has high overhead, and the output synchronization isn't all that performant either. I did get quite acceptable speedup out of a 150-makefile project. > And they are imperceptible with autoreconf. Oh well. Thanks for testing, Ralf
