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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2010-10-29 19:26:38 +0200 |
|---|---|---|
| committer | Denys Vlasenko <dvlasenk@redhat.com> | 2010-10-29 19:26:38 +0200 |
| commit | 5d49b72f1a3a362957171610b722ca8ec3f49734 (patch) | |
| tree | efb4dbaaff13e8901a5c723c6b9945028570d837 | |
| parent | 1642d0271027a7021a0a69fda3ac7082f5b01314 (diff) | |
| download | busybox-5d49b72f1a3a362957171610b722ca8ec3f49734.tar.gz | |
decompress_bunzip2: add profiling data to comment. no code changes
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
| -rw-r--r-- | archival/libunarchive/decompress_bunzip2.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/archival/libunarchive/decompress_bunzip2.c b/archival/libunarchive/decompress_bunzip2.c index 00ec47c75..2fa0f898a 100644 --- a/archival/libunarchive/decompress_bunzip2.c +++ b/archival/libunarchive/decompress_bunzip2.c @@ -20,6 +20,17 @@ the Burrows-Wheeler transformation. Much of that time is delay resulting from cache misses. + (2010 update by vda: profiled "bzcat <84mbyte.bz2 >/dev/null" + on x86-64 CPU with L2 > 1M: get_next_block is hotter than read_bunzip: + %time seconds calls function + 71.01 12.69 444 get_next_block + 28.65 5.12 93065 read_bunzip + 00.22 0.04 7736490 get_bits + 00.11 0.02 47 dealloc_bunzip + 00.00 0.00 93018 full_write + ...) + + I would ask that anyone benefiting from this work, especially those using it in commercial products, consider making a donation to my local non-profit hospice organization (www.hospiceacadiana.com) in the name of |