Fredrik Kuivinen <freku045@xxxxxxxxxxxxxx> writes:
> I turned out that the rename detection took almost 10 minutes on my
> machine. More specifically,
>
> git-diff-tree -r -M --diff-filter=R v2.6.12 v2.6.14
>
> takes ~9 minutes with the current 'next'.
I have some updates to "next" tonight.
On my otherwise idle Duron 750 with slow disks, I am getting
something like these:
0.99.9m : 130m virtual, 40m resident, (0major+14205minor)
67.62user 0.08system 1:15.95elapsed
master : 130m virtual, 40m resident, (0major+12510minor)
66.06user 0.07system 1:10.95elapsed
"next" : 150m virtual, 65m resident, (0major+49858minor)
51.41user 0.45system 0.57.55elapsed
The result will _not_ exactly match, because the similarity
estimation algorithms are different.
Judging the differences objectively is a bit hard, but my
impression is that the "next" one tends to find more sensible
renames. To name a few:
* Documentation/dvb/README.dibusb from v2.6.12 seems pretty
similar to Documentation/dvb/README.dvb-usb from v2.6.14, and
"next" finds them, but "master" does not.
* "master" says arch/arm/configs/omnimeter_defconfig was
copy-edited to produce arch/arm/configs/collie_defconfig; The
diff output shows ~350 new lines and ~270 deleted lines, while
these files are 800-900 lines long; "next" rejects them. I
think this is a border-line case.
* "next" finds Kconfig and Makefile in arch/arm/mach-omap-1/ are
derived from arch/arm/mach-omap/; manual inspection of these
files makes me feel that decision is sensible. "master" does
not find them.
* Same thing for config.c in arch/m68knommu/platform/68VZ328/;
found to be derived from arch/m68knommu/platform/68VZ328/de2/ by
"next" but not by "master".
* Other examples "next" finds but "master" misses include:
arch/um/kernel/process.c arch/um/os-Linux/start_up.c
arch/um/kernel/tt/unmap.c arch/um/sys-x86_64/unmap.c
drivers/ide/cris/ide-v10.c drivers/ide/cris/ide-cris.c
include/asm-ppc/cputime.h include/asm-xtensa/cputime.h
include/asm-ppc64/ioctl.h include/asm-xtensa/ioctl.h
include/asm-ppc64/ioctls.h include/asm-xtensa/ioctls.h
include/asm-ppc64/mman.h include/asm-xtensa/mman.h
include/asm-ppc64/poll.h include/asm-xtensa/poll.h
include/asm-ppc64/shmbuf.h include/asm-xtensa/shmbuf.h
include/asm-ppc64/socket.h include/asm-xtensa/socket.h
include/asm-ppc64/termbits.h include/asm-xtensa/termbits.h
* The "next" one is not perfect. There are some quite bad
choices made by it:
include/asm-ppc64/timex.h include/asm-powerpc/bugs.h
include/asm-ppc64/iSeries/LparData.h include/linux/i2c-isa.h
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