7zip
Intel Core i7 920 testing with a Acer Aspire G7710 and ASUS AMD Radeon HD 5770 1024MB on Ubuntu 14.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1412318-SO-7ZIP1319300.
7-Zip Compression
Compress Speed Test
Phoronix Test Suite v10.8.4