7z
Intel Core i7-3770K testing with a ASUS P8Z77-V and NVIDIA GeForce GTX 660/PCIe/SSE2 2048MB on Ubuntu 12.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1305043-AR-7Z177296763.
7-Zip Compression
Compress Speed Test
Phoronix Test Suite v10.8.4