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decompress_bunzip2: add profiling data to comment. no code changes

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Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
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Denys Vlasenko 2010-10-29 19:26:38 +02:00
parent 1642d02710
commit 5d49b72f1a
1 changed files with 11 additions and 0 deletions
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11
archival/libunarchive/decompress_bunzip2.c
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@ -20,6 +20,17 @@
the Burrows-Wheeler transformation. Much of that time is delay the Burrows-Wheeler transformation. Much of that time is delay
resulting from cache misses. 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
...)
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