Re: lib/50791: NetBSD's malloc has performance issues

[Onno van der Linden <o.vd.linden%quicknet.nl@localhost>]

The following reply was made to PR lib/50791; it has been noted by GNATS.

From: Onno van der Linden <o.vd.linden%quicknet.nl@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: lib/50791: NetBSD's malloc has performance issues
Date: Fri, 12 Feb 2016 18:17:20 +0100

 > I have prepared a test program that performs a sequence of 100226
 > mallocs and frees, derived from a trace of the actual malloc/free
 > calls made by the application.  To run it:
 
 On my machine:
 NetBSD sheep 7.99.25 NetBSD 7.99.25 (SHEEP) #9: Sun Jan  3 09:04:37 MET 2016  onno@sheep:/usr/src/sys/arch/i386/compile/SHEEP i386
 
 $ cc mtest.c
 $ time ./a.out
     1.35s real     1.28s user     0.02s system
 $ time ./a.out 
     1.30s real     1.29s user     0.01s system
 $ time ./a.out 
     1.30s real
 $ cc mtest.c -lbsdmalloc
 $ time ./a.out           
     0.09s real     0.02s user     0.06s system
 $ time ./a.out 
     0.09s real     0.03s user     0.06s system
 
 Then I grabbed and installed the latest jemalloc from github
 (https://github.com/jemalloc/jemalloc/archive/dev.zip)
 
 $ cc mtest.c -Wl,-R/usr/local/lib -L/usr/local/lib -ljemalloc
 $ time ./a.out
     0.14s real     0.08s user     0.05s system
 $ time ./a.out 
     0.14s real     0.09s user     0.06s system
 
 Then I grabbed and installed jemalloc 4.0.4
 $ cc mtest.c -L/usr/local/lib -Wl,-R/usr/local/lib  -ljemalloc 
 $ time ./a.out                                                 
     0.14s real     0.10s user     0.03s system
 $ time ./a.out 
     0.13s real     0.08s user     0.05s system
 
 Looks like NetBSD's jemalloc could use an upgrade
 to 4.0.4.
 
 Regards,
 
 Onno