GxMagick
Intel Core i7-3770 testing with a ASRock B75M-ITX and Intel Ivy on Ubuntu 12.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1209274-AR-GXMAGICK953.
GraphicsMagick
Operation: Sharpen
Phoronix Test Suite v10.8.4