Add explanation of the profile feedback build to the README
Also explains that the are additional warnings. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Andi Kleen committed
Jun 20, 2011 at 15:41 UTC
39001007390a699265f16da47474d2b112118931
1 file changed
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INSTALL
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@@ -25,6 +25,19 @@ set up install paths (via config.mak.autogen), so you can write instead
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$ make all doc ;# as yourself
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# make install install-doc install-html;# as root
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+If you're willing to trade off (much) longer build time for a later
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+faster git you can also do a profile feedback build with
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+
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+ $ make profile-all
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+ # make prefix=... install
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+
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+This will run the complete test suite as training workload and then
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+rebuild git with the generated profile feedback. This results in a git
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+which is a few percent faster on CPU intensive workloads. This
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+may be a good tradeoff for distribution packagers.
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+
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+Note that the profile feedback build stage currently generates
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+a lot of additional compiler warnings.
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Issues of note:
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