mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.2 KiB
83 lines
2.2 KiB
if (typeof(uuid) == 'undefined') {
|
|
uuid = require('../uuid');
|
|
}
|
|
|
|
var UUID_FORMAT = /[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89a-fAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}/;
|
|
var N = 1e5;
|
|
|
|
function log(msg) {
|
|
if (typeof(document) != 'undefined') {
|
|
document.write('<div>' + msg + '</div>');
|
|
}
|
|
if (typeof(console) != 'undefined') {
|
|
console.log(msg);
|
|
}
|
|
}
|
|
|
|
function rate(msg, t) {
|
|
log(msg + ': ' + (N / (Date.now() - t) * 1e3 | 0) + ' uuids/second');
|
|
}
|
|
|
|
// Perf tests
|
|
log('- - - Performance Data - - -');
|
|
for (var i = 0, t = Date.now(); i < N; i++) uuid();
|
|
rate('uuid()', t);
|
|
for (var i = 0, t = Date.now(); i < N; i++) uuid('binary');
|
|
rate('uuid(\'binary\')', t);
|
|
var buf = new uuid.BufferClass(16);
|
|
for (var i = 0, t = Date.now(); i < N; i++) uuid('binary', buf);
|
|
rate('uuid(\'binary\', buffer)', t);
|
|
|
|
var counts = {}, max = 0;
|
|
|
|
var b = new uuid.BufferClass(16);
|
|
for (var i = 0; i < N; i++) {
|
|
id = uuid();
|
|
if (!UUID_FORMAT.test(id)) {
|
|
throw Error(id + ' is not a valid UUID string');
|
|
}
|
|
|
|
if (id != uuid.unparse(uuid.parse(id))) {
|
|
throw Error(id + ' does not parse/unparse');
|
|
}
|
|
|
|
// Count digits for our randomness check
|
|
var digits = id.replace(/-/g, '').split('');
|
|
for (var j = digits.length-1; j >= 0; j--) {
|
|
var c = digits[j];
|
|
max = Math.max(max, counts[c] = (counts[c] || 0) + 1);
|
|
}
|
|
}
|
|
|
|
// Get %'age an actual value differs from the ideal value
|
|
function divergence(actual, ideal) {
|
|
return Math.round(100*100*(actual - ideal)/ideal)/100;
|
|
}
|
|
|
|
log('<br />- - - Distribution of Hex Digits (% deviation from ideal) - - -');
|
|
|
|
// Check randomness
|
|
for (var i = 0; i < 16; i++) {
|
|
var c = i.toString(16);
|
|
var bar = '', n = counts[c], p = Math.round(n/max*100|0);
|
|
|
|
// 1-3,5-8, and D-F: 1:16 odds over 30 digits
|
|
var ideal = N*30/16;
|
|
if (i == 4) {
|
|
// 4: 1:1 odds on 1 digit, plus 1:16 odds on 30 digits
|
|
ideal = N*(1 + 30/16);
|
|
} else if (i >= 8 && i <= 11) {
|
|
// 8-B: 1:4 odds on 1 digit, plus 1:16 odds on 30 digits
|
|
ideal = N*(1/4 + 30/16);
|
|
} else {
|
|
// Otherwise: 1:16 odds on 30 digits
|
|
ideal = N*30/16;
|
|
}
|
|
var d = divergence(n, ideal);
|
|
|
|
// Draw bar using UTF squares (just for grins)
|
|
var s = n/max*50 | 0;
|
|
while (s--) bar += '=';
|
|
|
|
log(c + ' |' + bar + '| ' + counts[c] + ' (' + d + '%)');
|
|
}
|
|
|