From: David Miller <davem@xxxxxxxxxxxxx> Date: Fri, 07 Dec 2007 04:53:29 -0800 (PST) > I should run oprofile... While doing the initial object counting, most of the time is spent in lookup_object(), memcmp() (via hashcmp()), and inflate(). I tried to see if I could do some tricks on sparc with the hashcmp() but the sha1 pointers are very often not even 4 byte aligned. I suspect lookup_object() could be improved if it didn't use a hash table without chaining, but I can see why 'struct object' size is a concern and thus why things are done the way they are. samples % app name symbol name 504 13.7517 libc-2.6.1.so memcmp 386 10.5321 libz.so.1.2.3.3 inflate 288 7.8581 git lookup_object 248 6.7667 libz.so.1.2.3.3 inflate_fast 201 5.4843 libz.so.1.2.3.3 inflate_table 175 4.7749 git decode_tree_entry ... Deltifying is %94 consumed by create_delta(), the rest is completely in the noise. samples % app name symbol name 10581 94.8373 git create_delta 181 1.6223 git create_delta_index 72 0.6453 git prepare_pack 55 0.4930 libc-2.6.1.so loop 34 0.3047 libz.so.1.2.3.3 inflate_fast 33 0.2958 libc-2.6.1.so _int_malloc 22 0.1972 libshadow.so shadowUpdatePacked 21 0.1882 libc-2.6.1.so _int_free 19 0.1703 libc-2.6.1.so malloc ... - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
