From: Andi Kleen Date: Mon, 20 Jun 2011 22:41:01 GMT Subject: [PATCH] Add explanation of the profile feedback build to the README Message-ID: <1308609661-28650-1-git-send-email-andi@firstfloor.org> From: Andi Kleen Also explains that the are additional warnings. Signed-off-by: Andi Kleen --- INSTALL | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/INSTALL b/INSTALL index 16e45f1..bbb9d4d 100644 --- a/INSTALL +++ b/INSTALL @@ -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: -- 1.7.4.4