CompressionRatings.Com tests are pedantic and verifiable. All the software and test material are made public. The site can be used to compare relative performance of compression software. The data can be used to provide answers to end-user questions as well: how compressors compare, which one has "the best compression" or "the highest compression ratio", etc.
(The main benchmark consists of these tests.)
(Additional tests with unusual data that are not included into the main summary.)
(Small tests used for qualifying compressors for the main benchmark.)
(Tests that provide special benchmark data for experts.)