node-uuid v crazy gist (v22)

Revision 22 of this benchmark created on

Description

Compares

node-uuid - https://github.com/broofa/node-uuid

with

crazy gist - https://gist.github.com/jed/982883

Preparation HTML

<script>

/*
======================================================
uuid-v4.js :: Random UUID (v4) Generator - Usage: UUID()
======================================================

Copyright (c) 2011 Matt Williams <matt@makeable.co.uk>. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice, this list of
      conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright notice, this list
      of conditions and the following disclaimer in the documentation and/or other materials
      provided with the distribution.

THIS SOFTWARE IS PROVIDED BY MATT WILLIAMS ''AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATT WILLIAMS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those of the
authors and should not be interpreted as representing official policies, either expressed
or implied, of Matt Williams.

*/

(function(){
  
  var dec2hex = [];
  for (var i=0; i<=15; i++) {
    dec2hex[i] = i.toString(16);
  }
  
  var UUID = function() {
    var uuid = '';
    for (var i=1; i<=36; i++) {
      if (i===9 || i===14 || i===19 || i===24) {
        uuid += '-';
      } else if (i===15) {
        uuid += 4;
      } else if (i===20) {
        uuid += dec2hex[(Math.random()*4|0 + 8)];
      } else {
        uuid += dec2hex[(Math.random()*15|0)];
      }
    }
    return uuid;
  };
  
  if (typeof exports !== 'undefined') {
    module.exports = UUID;
  } else {
    this.UUID = UUID;
  }
  
})(this);

//     uuid.js
//
//     Copyright (c) 2010-2012 Robert Kieffer
//     MIT License - http://opensource.org/licenses/mit-license.php

(function() {
    var _global = this;

    // Unique ID creation requires a high quality random # generator.  We feature
    // detect to determine the best RNG source, normalizing to a function that
    // returns 128-bits of randomness, since that's what's usually required
    var _rng;

    // Node.js crypto-based RNG - http://nodejs.org/docs/v0.6.2/api/crypto.html
    //
    // Moderately fast, high quality
    if (typeof(require) == 'function') {
        try {
            var _rb = require('crypto').randomBytes;
            _rng = _rb && function() {
                return _rb(16);
            };
        } catch (e) {}
    }

    if (!_rng && _global.crypto && crypto.getRandomValues) {
        // WHATWG crypto-based RNG - http://wiki.whatwg.org/wiki/Crypto
        //
        // Moderately fast, high quality
        var _rnds8 = new Uint8Array(16);
        _rng = function whatwgRNG() {
            crypto.getRandomValues(_rnds8);
            return _rnds8;
        };
    }

    if (!_rng) {
        // Math.random()-based (RNG)
        //
        // If all else fails, use Math.random().  It's fast, but is of unspecified
        // quality.
        var _rnds = new Array(16);
        _rng = function() {
            for (var i = 0, r; i < 16; i++) {
                if ((i & 0x03) === 0) r = Math.random() * 0x100000000;
                _rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
            }

            return _rnds;
        };
    }

    // Buffer class to use
    var BufferClass = typeof(Buffer) == 'function' ? Buffer : Array;

    // Maps for number <-> hex string conversion
    var _byteToHex = [];
    var _hexToByte = {};
    for (var i = 0; i < 256; i++) {
        _byteToHex[i] = (i + 0x100).toString(16).substr(1);
        _hexToByte[_byteToHex[i]] = i;
    }

    // **`parse()` - Parse a UUID into it's component bytes**
    function parse(s, buf, offset) {
        var i = (buf && offset) || 0,
            ii = 0;

        buf = buf || [];
        s.toLowerCase().replace(/[0-9a-f]{2}/g, function(oct) {
            if (ii < 16) { // Don't overflow!
                buf[i + ii++] = _hexToByte[oct];
            }
        });

        // Zero out remaining bytes if string was short
        while (ii < 16) {
            buf[i + ii++] = 0;
        }

        return buf;
    }

    // **`unparse()` - Convert UUID byte array (ala parse()) into a string**
    function unparse(buf, offset) {
        var i = offset || 0,
            bth = _byteToHex;
        return bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]];
    }

    // **`v1()` - Generate time-based UUID**
    //
    // Inspired by https://github.com/LiosK/UUID.js
    // and http://docs.python.org/library/uuid.html

    // random #'s we need to init node and clockseq
    var _seedBytes = _rng();

    // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
    var _nodeId = [
    _seedBytes[0] | 0x01,
    _seedBytes[1], _seedBytes[2], _seedBytes[3], _seedBytes[4], _seedBytes[5]];

    // Per 4.2.2, randomize (14 bit) clockseq
    var _clockseq = (_seedBytes[6] << 8 | _seedBytes[7]) & 0x3fff;

    // Previous uuid creation time
    var _lastMSecs = 0,
        _lastNSecs = 0;

    // See https://github.com/broofa/node-uuid for API details
    function v1(options, buf, offset) {
        var i = buf && offset || 0;
        var b = buf || [];

        options = options || {};

        var clockseq = options.clockseq != null ? options.clockseq : _clockseq;

        // UUID timestamps are 100 nano-second units since the Gregorian epoch,
        // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
        // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
        // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
        var msecs = options.msecs != null ? options.msecs : new Date().getTime();

        // Per 4.2.1.2, use count of uuid's generated during the current clock
        // cycle to simulate higher resolution clock
        var nsecs = options.nsecs != null ? options.nsecs : _lastNSecs + 1;

        // Time since last uuid creation (in msecs)
        var dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs) / 10000;

        // Per 4.2.1.2, Bump clockseq on clock regression
        if (dt < 0 && options.clockseq == null) {
            clockseq = clockseq + 1 & 0x3fff;
        }

        // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
        // time interval
        if ((dt < 0 || msecs > _lastMSecs) && options.nsecs == null) {
            nsecs = 0;
        }

        // Per 4.2.1.2 Throw error if too many uuids are requested
        if (nsecs >= 10000) {
            throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
        }

        _lastMSecs = msecs;
        _lastNSecs = nsecs;
        _clockseq = clockseq;

        // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
        msecs += 12219292800000;

        // `time_low`
        var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
        b[i++] = tl >>> 24 & 0xff;
        b[i++] = tl >>> 16 & 0xff;
        b[i++] = tl >>> 8 & 0xff;
        b[i++] = tl & 0xff;

        // `time_mid`
        var tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
        b[i++] = tmh >>> 8 & 0xff;
        b[i++] = tmh & 0xff;

        // `time_high_and_version`
        b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
        b[i++] = tmh >>> 16 & 0xff;

        // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
        b[i++] = clockseq >>> 8 | 0x80;

        // `clock_seq_low`
        b[i++] = clockseq & 0xff;

        // `node`
        var node = options.node || _nodeId;
        for (var n = 0; n < 6; n++) {
            b[i + n] = node[n];
        }

        return buf ? buf : unparse(b);
    }

    // **`v4()` - Generate random UUID**

    // See https://github.com/broofa/node-uuid for API details
    function v4(options, buf, offset) {
        // Deprecated - 'format' argument, as supported in v1.2
        var i = buf && offset || 0;

        if (typeof(options) == 'string') {
            buf = options == 'binary' ? new BufferClass(16) : null;
            options = null;
        }
        options = options || {};

        var rnds = options.random || (options.rng || _rng)();

        // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
        rnds[6] = (rnds[6] & 0x0f) | 0x40;
        rnds[8] = (rnds[8] & 0x3f) | 0x80;

        // Copy bytes to buffer, if provided
        if (buf) {
            for (var ii = 0; ii < 16; ii++) {
                buf[i + ii] = rnds[ii];
            }
        }

        return buf || unparse(rnds);
    }

    // Export public API
    var uuid = v4;
    uuid.v1 = v1;
    uuid.v4 = v4;
    uuid.parse = parse;
    uuid.unparse = unparse;
    uuid.BufferClass = BufferClass;

    if (typeof define === 'function' && define.amd) {
        // Publish as AMD module
        define(function() {
            return uuid;
        });
    } else if (typeof(module) != 'undefined' && module.exports) {
        // Publish as node.js module
        module.exports = uuid;
    } else {
        // Publish as global (in browsers)
        var _previousRoot = _global.uuid;

        // **`noConflict()` - (browser only) to reset global 'uuid' var**
        uuid.noConflict = function() {
            _global.uuid = _previousRoot;
            return uuid;
        };

        _global.uuid = uuid;
    }
}).call(this);


function b() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
    return v.toString(16);
});
}

var test_uuid = (function() {
    var d2h = [], vals = new Array(16);
    for (var i = 0; i < 256; ++i) d2h.push((0x100 + i).toString(16).substr(1));
    function uuid() {
        for (var i = 0; i < 16; ++i) vals[i] = Math.random() * 256 | 0;
        vals[6] = vals[6] & 0x0f | 0x40;
        vals[8] = vals[8] & 0x3f | 0x80;
        return d2h[vals[0]] + d2h[vals[1]] + d2h[vals[2]] + d2h[vals[3]] +
            '-' + d2h[vals[4]] + d2h[vals[5]] +
            '-' + d2h[vals[6]] + d2h[vals[7]] +
            '-' + d2h[vals[8]] + d2h[vals[9]] +
            '-' + d2h[vals[10]] + d2h[vals[11]] + d2h[vals[12]] + d2h[vals[13]] + d2h[vals[14]] + d2h[vals[15]];
    }
    return uuid;
})();

</script>

Test runner

Ready to run.

Testing in
TestOps/sec
uuid.v1()
uuid.v1()
ready
uuid.v4()
uuid.v4()
ready
Crazy Gist
b()
ready
Modified Crazy
test_uuid()
ready
UUID
UUID()
ready

Revisions

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