uuid-base62/compare.js

Base62 non-sequential url-safe UUID generator (RFC4122)

var baseX = require('base-x')('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
var b62 = require('b62');
var Uuid = require('node-uuid');

var buf = new Buffer([0x30, 0x17, 0xe8, 0x92, 0xe2, 0x3d, 0xff]);
var str = "Hello World!";
var encodedX, encoded62, decodedX, decoded62, runs=100;

// warm up

console.time('base-x');
for(var i = 0; i < runs; i++){
  encodedX = baseX.encode(buf, 'hex');
  decodedX = baseX.decode(encodedX);
  //console.log('x:', encodedX);
  //console.log('x:', new Buffer(decodedX).toString('hex'));
  encodedX = baseX.encode(new Buffer(str));
  decodedX = baseX.decode(encodedX);
  //console.log('x:', encodedX);
  //console.log('x:', new Buffer(decodedX).toString());
}
console.timeEnd('base-x');

console.time('b62');
for(var i = 0; i < runs; i++){
  encoded62 = b62.encode(buf);
  decoded62 = b62.decode(encoded62, 'hex');
  //decoded62 = b62.decode(encoded62);
  //console.log('b62:', decoded62);
  encoded62 = b62.encode(str);
  //console.log('b62:', encoded62);
  //console.log('x:', 'b62:', decoded62);
}
console.timeEnd('b62');

// Test

console.time('base-x');
for(var i = 0; i < runs; i++){
  encodedX = baseX.encode(buf, 'hex');
  decodedX = baseX.decode(encodedX);
  encodedX = baseX.encode(new Buffer(str));
  decodedX = baseX.decode(encodedX);
}
console.timeEnd('base-x');



console.time('b62');
for(var i = 0; i < runs; i++){
  encoded62 = b62.encode(buf);
  decoded62 = b62.decode(encoded62, 'hex');
  encoded62 = b62.encode(str);
  decoded62 = b62.decode(encoded62);
}
console.timeEnd('b62');

// b64
console.log()
var b64 = b62("-_0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
var encoded = b64.encode("Hi this is b64 example");
console.log(encoded);
console.log(b64.decode(encoded));

// uuid
console.log();
var buf = new Buffer(16);
var uuid = Uuid.v4(null, buf);

var uuidB62 = baseX.encode(uuid);
// -> 71jbvv7LfRKYp19gtRLtkn

console.log(uuidB62);
console.log(new Buffer(baseX.decode(uuidB62)).toString('hex'));



console.log();
console.log('encode');
// uuid2

//uuid = '06ad547ffe02477b9473f7977e4d5e17';
//uuid = '00000000000000000000000000000000';
uuid = 'ffffffffffffffffffffffffffffffff';

console.log('basex:', baseX.encode(new Buffer(uuid, 'hex')));
console.log('b62  :', b62.encode(new Buffer(uuid, 'hex')));


console.log();
console.log('decode');
uuidB62 = '0cBaidlJ84Ggc5JA7IYCgv';

console.log('basex:', new Buffer(baseX.decode(uuidB62)).toString('hex'));
console.log('b62  :', b62.decode(uuidB62, 'hex'));



console.log();

function trimLeft(str, maxLen){
  str = str + "";
  var trim = 0;
  while(str[trim] === '0' && (str.length - trim) > maxLen){
    trim++;
  }
  return str.slice(trim);
};

console.log('001:', trimLeft('00001', 3));
console.log('01:', trimLeft('01', 2));
console.log('01:', trimLeft('001', 2));
console.log('111:', trimLeft('111', 2));
console.log('111:', trimLeft('0111', 2));