bit compressor in pure javascript

bitcompressor.js

// bit compressor
// by stagas
// public domain

var bitEncode = function(bits) {
  var arr = []
  while (bits.length) {
    arr.push(parseInt('1' + bits.substr(0, 52), 2).toString(32))
    bits = bits.substr(52)
  }
  return arr.join('.')
}

var bitDecode = function(str) {
  var sarr = str.split('.')
    , arr = []
    
  for (var i = 0, len=sarr.length; i<len; i++) {
    arr.push(parseInt(sarr[i], 32).toString(2).substr(1))
  }

  return arr.join('')
}

var bits =
  '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'
+ '110110010101010010101010010101111101010101011111010101001011101010011101010100101010110'

var compressed = bitEncode(bits)

console.log('Output:', compressed)

console.log('Down to', (compressed.length / bits.length * 100).toFixed(2), '% of original size')

console.log('Test:', bits == bitDecode(compressed))

gistfile2.txt

Output: 7cl9ainqlfl.55qjl9arcl9.5aavalul5qj.6l5bdil5aav.5anqknael5b.5makl9btanq.6it9qkldmak.6l5flavait9.7ailmpail5f.6lbtabl7ail.6r5aaklulbt.59ektaamr5a.5ainqlfl9ek.7l9arcl9ain.7alul5qjl9a.7dil5aavalu.d9ektaam
Down to 22.99 % of original size
Test: true