In response to a chatter between Japanese developers on Twitter about how asm.js would perform on web browsers other than Firefox, @y_imaya has written a benchmark between zlib.js that he develops and maintains vs. zlib-asm written by @ukyo by inflating (e.g. decompressing) Canterbury Corpus (a well-known set of files used for benchmarking compressor/decompressors). His blog post can be found here