encode-decode-5-bits.js

//actual inputs

var t0 = process.hrtime();

var m = new Uint8Array(30*60*60*5);
for (var c = 0; c < m.length; c++)m[c] = Math.random() * 32 | 0;


var mk = [];
var pad = "00000";
//inputs as bits
for (var j = 0; j < m.length; j++) {
  var str = m[j].toString(2);
  str = pad.substring(0, pad.length - str.length) + str;
  var km = str.split('');
  mk.push(km[0]);
  mk.push(km[1]);
  mk.push(km[2]);
  mk.push(km[3]);
  mk.push(km[4]);
}
var dl = [];
//bits as numbers
for (j = 0; j < mk.length; j += 8) {
  var str = '';
  for (c = 0; c < 8; c++) {
    str += (mk[j + c]===undefined?"0":mk[j + c]);
  }
  dl.push(parseInt(str, 2))
}
console.log(dl.length,m.length)

var diff=process.hrtime(t0);
 console.log('encode',(diff[0] * 1e9 + diff[1])/1000/1000);
var t0 = process.hrtime();


var md = [];
//numbers as bits
for (var c = 0; c < dl.length; c++) {
  var long = dl[c];
 
  for (var i = 7; i >= 0; i--) {
    var bit = long & (1 << i) ? 1 : 0;
    md.push(bit);
  }
}

var fc = md;
var dc = [];
//bits as inputs
for (var c = 0; c <= fc.length; c += 5) {
  var j = (fc[c]===undefined?"":fc[c]) + "" +( fc[c+1]===undefined?"":fc[c+1]) + "" +  (fc[c+2]===undefined?"":fc[c+2]) + "" +  (fc[c+3]===undefined?"":fc[c+3]) + "" +  (fc[c+4]===undefined?"":fc[c+4]);
  dc.push(parseInt(j, 2));;
}



for (var c = 0; c < m.length; c++) {
  if(dc[c] != m[c])console.log('fail');
}

var diff=process.hrtime(t0);
console.log('deencode',(diff[0] * 1e9 + diff[1])/1000/1000);