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-rw-r--r--INSTALL17
1 files changed, 13 insertions, 4 deletions
diff --git a/INSTALL b/INSTALL
index 6fa83fe2b8..58b2b86ccf 100644
--- a/INSTALL
+++ b/INSTALL
@@ -28,16 +28,25 @@ set up install paths (via config.mak.autogen), so you can write instead
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
+ $ make prefix=/usr PROFILE=BUILD all
+ # make prefix=/usr PROFILE=BUILD 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.
+Or if you just want to install a profile-optimized version of git into
+your home directory, you could run:
+
+ $ make PROFILE=BUILD install
+
+As a caveat: a profile-optimized build takes a *lot* longer since the
+git tree must be built twice, and in order for the profiling
+measurements to work properly, ccache must be disabled and the test
+suite has to be run using only a single CPU. In addition, the profile
+feedback build stage currently generates a lot of additional compiler
+warnings.
Issues of note: