decompress_bunzip2: add profiling data to comment. no code changes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

diff --git a/archival/libunarchive/decompress_bunzip2.c b/archival/libunarchive/decompress_bunzip2.c
index 00ec47c7517c01d2359853f06fdb4549b710edc8..2fa0f898a3c2c57c7d1d791c6b0bc4811bcf552d 100644 (file)
--- 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