Loading .tar.gz with JavaScript

With the power of copy-pasting code from the INTERNET, I have now created a JavaScript library that streams gzip files and specifically .tar.gz files.

DEFLATE and CRC32 implementations found with Google and tweaked and bolted onto the tar parser. The performance is something between 1-5 MB/s on Chrome, third of that on Minefield.

In action: Demo page
Just the library: gzip.js