FLAC
Intel Celeron 1017U testing with a Acer Aspire V5-431 and Intel HD 2500 on Ubuntu 14.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1503058-SO-FLAC3063165.
FLAC Audio Encoding
WAV To FLAC
Phoronix Test Suite v10.8.4