JEMALLOC 4.0 released - any chance of a benchmark against 3.6 ?

[_ck_]

Jemalloc 4.0 quietly shipped a week or so ago:

https://github.com/jemalloc/jemalloc/releases/tag/4.0.0

EPEL only carries 3.6 (for awhile now)

But I found a reliable source of rpms here for many flavors of redhat:

http://users.linpro.no/ingvar/jemalloc/4.0.0/

Seems to work fine on CentOS 6 & 7.

But I am curious if it is actually faster.

Since mysql can drop in jemalloc via my.cnf

malloc-lib=/usr/lib64/libjemalloc.so

and you can always just do

echo "/usr/lib64/libjemalloc.so" >> /etc/ld.so.preload

(restart services and watch lsof -n | grep jemalloc to see them all use jemalloc)

maybe some benchmarks can be done to compare glibc vs jem 3.6 jem 4.0 ?

[enihcam]

+1
Also, I'm curious about comparison between jemalloc and legacy malloc.