From 5d49b72f1a3a362957171610b722ca8ec3f49734 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 29 Oct 2010 19:26:38 +0200 Subject: [PATCH] decompress_bunzip2: add profiling data to comment. no code changes Signed-off-by: Denys Vlasenko --- archival/libunarchive/decompress_bunzip2.c | 11 +++++++++++ 1 file changed, 11 insertions(+) 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