Use the dev-util/google-perftools libraries to replace the malloc() implementation with a possibly faster one
Name Category Description
aria2 net-misc A download utility with segmented downloading with BitTorrent support
bitset dev-libs A compressed bitset with supporting data structures and algorithms
ceph sys-cluster Ceph distributed filesystem
enblend media-gfx Image Blending with Multiresolution Splines
fio sys-block Jens Axboe's Flexible IO tester
freecell-solver dev-games C library for automatically solving Freecell and some other solitaire variants
glusterfs sys-cluster GlusterFS is a powerful network/cluster filesystem
leveldb dev-libs A fast key-value storage library written at Google
libmemcached dev-libs a C client library to the memcached server
mariadb dev-db An enhanced, drop-in replacement for MySQL
mysql dev-db A fast, multi-threaded, multi-user SQL database server
percona-server dev-db Fully compatible, enhanced and open source drop-in replacement for MySQL
rawtherapee media-gfx A powerful cross-platform raw image processing program
redis dev-db A persistent caching system, key-value, and data structures database
symengine sci-libs Fast symbolic manipulation library, written in C++

Thank you!