On Mon, Apr 29, 2013 at 07:35:01PM +0530, Ramkumar Ramachandra wrote:
> On a related note, one place that IO parallelism can provide massive
> benefits is in executing shell scripts. Accordingly, I always use the
> following commands to compile and test git respectively:
> make -j 8 CFLAGS="-g -O0 -Wall"
> make -j 8 DEFAULT_TEST_TARGET=prove GIT_PROVE_OPTS="-j 16" test
> i.e. always use 8 threads when the task is known to be CPU intensive,
> and always use 16 threads when the task is known to be IO intensive.
On this tangent, I recently added a TEST_OUTPUT_DIRECTORY line to my
config.mak which points into a tmpfs mount. Keeping all of the test
repositories in RAM makes the tests significantly faster for me and
works nicely when you have the patches in jk/test-output (without those
patches the individual tests work but the reporting of aggregate results
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