On 22/01/2012 2:38 PM, David Kastrup wrote:
Julien Rioux<jri...@physics.utoronto.ca> writes:
I can't run -j, I have a single core.
This is factually incorrect. You can run -j just fine, but you can't
expect much of a speedup. On a single-core machine,
make -j 2
typically gives you a speedup of maybe 15% (given sufficient memory)
since the CPU can keep busy on processing a second job when the other
job is waiting for the disk to provide new input.
More importantly, you'll get to see the same kind of problems that the
true multi-core people experience when using -j.
So very much recommended for testing.
Thanks, you're quite right CPU is not the limiting factor for the build.
Disk access and usage of swap when compiling
input/regression/collated-files slows down the build to a crawl for me.
--
Julien
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