On Mon, Sep 05, 2005 at 01:48:19AM +0400, Dmitry V. Levin wrote:
[...]
> убирание ненужных символов даёт стабилизацию использования и рост скорости
> запуска.  На том же libdb4.3 выигрыш умопомрачительный.

Немного цифр:

$ ls -log {old,new}/libdb-4.3.so 
-rw-r--r--  1 854016 Окт  8 00:17 new/libdb-4.3.so
-rw-r--r--  1 936160 Июн 15 22:31 old/libdb-4.3.so

$ nm -D old/libdb-4.3.so |grep -c '^[0-9a-f]'
1431
$ nm -D new/libdb-4.3.so |grep -c '^[0-9a-f]'
51

$ rm -f my_db.db && env -i LD_DEBUG=statistics LD_LIBRARY_PATH=old ./db_create
     12345:	                 number of relocations: 632
     12345:	      number of relocations from cache: 6
     12345:	        number of relative relocations: 1593
     12345:	
     12345:	runtime linker statistics:
     12345:	           final number of relocations: 748
     12345:	final number of relocations from cache: 6
$ rm -f my_db.db && env -i LD_DEBUG=statistics LD_LIBRARY_PATH=new ./db_create
     12345:	                 number of relocations: 106
     12345:	      number of relocations from cache: 5
     12345:	        number of relative relocations: 2120
     12345:	
     12345:	runtime linker statistics:
     12345:	           final number of relocations: 139
     12345:	final number of relocations from cache: 5

$ env -i LD_LIBRARY_PATH=old time sh -c 'rm -f my_db.db; for i in `seq 10000`; do ./db_create; done'
5.53user 4.15system 0:09.68elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (1920466major+361627minor)pagefaults 0swaps
$ env -i LD_LIBRARY_PATH=new time sh -c 'rm -f my_db.db; for i in `seq 10000`; do ./db_create; done'
2.82user 3.91system 0:06.72elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (1750466major+351627minor)pagefaults 0swaps


-- 
ldv