7zip
Intel Core i5 760 testing with a HP 304Bh and AMD Radeon HD 4650 1024MB on LinuxMint 12 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1301215-RA-7ZIP1800878.
7-Zip Compression
Compress Speed Test
Phoronix Test Suite v10.8.4