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Add explanation of the profile feedback build to the README

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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>
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Andi Kleen 2011-06-20 15:41:01 -07:00 committed by Junio C Hamano
parent 7ddc2710b9
commit 3900100739
1 changed files with 13 additions and 0 deletions
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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
$ make all doc ;# as yourself
# make install install-doc install-html;# as root
If you're willing to trade off (much) longer build time for a later
faster git you can also do a profile feedback build with
$ make profile-all
# make prefix=... install
This will run the complete test suite as training workload and then
rebuild git with the generated profile feedback. This results in a git
which is a few percent faster on CPU intensive workloads. This
may be a good tradeoff for distribution packagers.
Note that the profile feedback build stage currently generates
a lot of additional compiler warnings.
Issues of note: