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:
- "Perl" version 5.8 or later is needed to use some of the
features (e.g. preparing a partial commit using "git add -i/-p",
interacting with svn repositories with "git svn"). If you can
- live without these, use NO_PERL.
+ live without these, use NO_PERL. Note that recent releases of
+ Redhat/Fedora are reported to ship Perl binary package with some
+ core modules stripped away (see http://lwn.net/Articles/477234/),
+ so you might need to install additional packages other than Perl
+ itself, e.g. Time::HiRes.
- "openssl" library is used by git-imap-send to use IMAP over SSL.
If you don't need it, use NO_OPENSSL.