On 2013-11-15 4:58 AM, Neil wrote:
Ehsan Akhgari wrote:
we go down from 1m51s on my machine to 31s
And how does that compare to the case where you touch one .cpp file in
each subdirectory of layout?
It depends on which file, obviously, but here is an example with a
random file:
Before the patch:
$ touch layout/generic/FrameChildList.cpp
$ time make -s -j8 -C obj-ff-dbg/layout/generic/
FrameChildList.o
libgkgeneric_s.a.desc
real 0m0.793s
user 0m0.669s
sys 0m0.112s
After the patch:
$ touch layout/generic/FrameChildList.cpp
$ time make -s -j8 -C obj-ff-dbg/layout/generic/
Unified_cpp_layout_generic0.o
libgkgeneric_s.a.desc
real 0m0.855s
user 0m0.323s
sys 0m0.131s
As I said in my first post, touching one cpp file and building will be
slightly slower with unified builds.
Cheers,
Ehsan
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