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| author | Dmitry Konishchev | 2011-05-18 13:03:59 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2011-05-18 14:39:15 +0200 |
| commit | f6a00aa150ec685966ca9453601328fdb2f87f34 (patch) | |
| tree | 0a1ed191b8a845f9583132d1f68c13abdcff8f5d /linux-user | |
| parent | qed: Periodically flush and clear need check bit (diff) | |
| download | qemu-f6a00aa150ec685966ca9453601328fdb2f87f34.tar.gz qemu-f6a00aa150ec685966ca9453601328fdb2f87f34.tar.xz qemu-f6a00aa150ec685966ca9453601328fdb2f87f34.zip | |
qemu_img: is_not_zero() optimization
I run qemu-img under profiler and realized, that most of CPU time is
consumed by is_not_zero() function. I had made a couple of optimizations
on it and got the following output for `time qemu-img convert -O qcow2
volume.qcow2 snapshot.qcow2`:
Original qemu-img:
real 0m56.159s
user 0m34.670s
sys 0m12.079s
Patched qemu-img:
real 0m34.805s
user 0m18.445s
sys 0m12.552s
Signed-off-by: Dmitry Konishchev <konishchev@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'linux-user')
0 files changed, 0 insertions, 0 deletions