Add compression algorithm benchmarks#271

I think it would be helpful to include benchmarks for the common compression algorithms that `zlib` supports. In particular, I would like to see the comparison between `deflate` and `gzip`. Some sort of "large" JSON representation should be used for the test. https://github.com/matthewreagan/WebstersEnglishDictionary/blob/master/dictionary.json may be _too_ large, but something at least a couple of megabytes.