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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-01-02 07:08:50 +0000
committerPeter Korsgaard <jacmet@sunsite.dk>2013-01-02 18:58:24 +0100
commit4359685e145798f06d88eb2e5ba5979ba5de882e (patch)
treee3e9d7b8023f6f84c00e1e23d63f503cfc76068c /configs/beaglebone_defconfig
parent41af66ef393754381778ade4228fef7f1ed3cf52 (diff)
downloadbuildroot-novena-4359685e145798f06d88eb2e5ba5979ba5de882e.tar.gz
buildroot-novena-4359685e145798f06d88eb2e5ba5979ba5de882e.zip
graph-depends: optimize execution speed
Until now, graph-depends was calling "make <pkg>-show-depends" individually for eack package, which was very slow. Now, it calls "make <pkg1>-show-depends <pkg2>-show-depends ... <pkgN>-show-depends" for all packages it knows, and then does that recursively. It reduces the number of make invocations to the deepest dependency chain in the current configuration, instead of having a number of make invocations equal to the number of enabled packages. For a configuration with xvkbd enabled (which brings a significant number of X.org dependencies) and a tar root filesystem, the time to execute graph-depends was: real 5m14.944s user 4m53.590s sys 0m14.069s After our optimizations, it is now: real 0m33.096s user 0m30.878s sys 0m1.472s Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
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