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342 lines
11 KiB
342 lines
11 KiB
5 years ago
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var arg, i, j, max, method, methodIndex, decimalPlaces, rounding, reps, start,
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timesEqual, xs, ys, prevRss, prevHeapUsed, prevHeapTotal, showMemory,
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bdM, bdT, bdR, bdRs,
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bnM, bnT, bnR, bnRs,
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args = process.argv.splice(2),
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BigDecimal = require('./lib/bigdecimal_GWT/bigdecimal').BigDecimal,
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BigNumber = require('../bignumber'),
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bdMs = ['add', 'subtract', 'multiply', 'divide', 'remainder',
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'compareTo', 'pow', 'negate', 'abs'],
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bnMs1 = ['plus', 'minus', 'multipliedBy', 'dividedBy', 'modulo',
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'comparedTo', 'exponentiatedBy', 'negated', 'absoluteValue'],
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bnMs2 = ['', '', '', 'div', 'mod', '', '', '', ''],
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Ms = [bdMs, bnMs1, bnMs2],
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allMs = [].concat.apply([], Ms),
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bdTotal = 0,
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bnTotal = 0,
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BD = {},
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BN = {},
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ALWAYS_SHOW_MEMORY = false,
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DEFAULT_MAX_DIGITS = 20,
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DEFAULT_POW_MAX_DIGITS = 20,
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DEFAULT_REPS = 1e4,
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DEFAULT_POW_REPS = 1e2,
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DEFAULT_PLACES = 20,
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MAX_POWER = 50,
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MAX_RANDOM_EXPONENT = 100,
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getRandom = function (maxDigits) {
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var i = 0, z,
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// number of digits - 1
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n = Math.random() * ( maxDigits || 1 ) | 0,
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r = ( Math.random() * 10 | 0 ) + '';
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if ( n ) {
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if ( z = r === '0' ) {
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r += '.';
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}
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for ( ; i++ < n; r += Math.random() * 10 | 0 ){}
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// 20% chance of integer
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if ( !z && Math.random() > 0.2 )
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r = r.slice( 0, i = ( Math.random() * n | 0 ) + 1 ) + '.' + r.slice(i);
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}
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// Avoid 'division by zero' error with division and modulo.
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if ((bdM == 'divide' || bdM == 'remainder') && parseFloat(r) === 0)
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r = ( ( Math.random() * 9 | 0 ) + 1 ) + '';
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// 50% chance of negative
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return Math.random() > 0.5 ? r : '-' + r;
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},
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// Returns exponential notation.
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//getRandom = function (maxDigits) {
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// var i = 0,
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// // n is the number of significant digits - 1
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// n = Math.random() * (maxDigits || 1) | 0,
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// r = ( ( Math.random() * 9 | 0 ) + 1 ) + ( n ? '.' : '' );
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//
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// for (; i++ < n; r += Math.random() * 10 | 0 ){}
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//
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// // Add exponent.
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// r += 'e' + ( Math.random() > 0.5 ? '+' : '-' ) +
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// ( Math.random() * MAX_RANDOM_EXPONENT | 0 );
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//
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// // 50% chance of being negative.
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// return Math.random() > 0.5 ? r : '-' + r
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//},
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getFastest = function (bn, bd) {
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var r;
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if (Math.abs(bn - bd) > 2) {
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r = 'Big' + ((bn < bd)
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? 'Number was ' + (bn ? parseFloat((bd / bn).toFixed(1)) : bd)
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: 'Decimal was ' + (bd ? parseFloat((bn / bd).toFixed(1)) : bn)) +
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' times faster';
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} else {
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timesEqual = 1;
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r = 'Times approximately equal';
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}
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return r;
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},
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getMemory = function (obj) {
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if (showMemory) {
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var mem = process.memoryUsage(),
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rss = mem.rss,
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heapUsed = mem.heapUsed,
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heapTotal = mem.heapTotal;
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if (obj) {
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obj.rss += (rss - prevRss);
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obj.hU += (heapUsed - prevHeapUsed);
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obj.hT += (heapTotal - prevHeapTotal);
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}
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prevRss = rss;
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prevHeapUsed = heapUsed;
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prevHeapTotal = heapTotal;
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}
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},
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getMemoryTotals = function (obj) {
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function toKB(m) {return parseFloat((m / 1024).toFixed(1))}
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return '\trss: ' + toKB(obj.rss) +
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'\thU: ' + toKB(obj.hU) +
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'\thT: ' + toKB(obj.hT);
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};
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if (arg = args[0], typeof arg != 'undefined' && !isFinite(arg) &&
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allMs.indexOf(arg) == -1 && !/^-*m$/i.test(arg)) {
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console.log(
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'\n node bigtime [METHOD] [METHOD CALLS [MAX DIGITS [DECIMAL PLACES]]]\n' +
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'\n METHOD: The method to be timed and compared with the' +
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'\n \t corresponding method from BigDecimal or BigNumber\n' +
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'\n BigDecimal: add subtract multiply divide remainder' +
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' compareTo pow\n\t\tnegate abs\n\n BigNumber: plus minus multipliedBy' +
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' dividedBy modulo comparedTo exponentiatedBy\n\t\tnegated absoluteValue' +
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' (div mod pow)' +
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'\n\n METHOD CALLS: The number of method calls to be timed' +
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'\n\n MAX DIGITS: The maximum number of digits of the random ' +
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'\n\t\tnumbers used in the method calls\n\n ' +
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'DECIMAL PLACES: The number of decimal places used in division' +
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'\n\t\t(The rounding mode is randomly chosen)' +
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'\n\n Default values: METHOD: randomly chosen' +
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'\n\t\t METHOD CALLS: ' + DEFAULT_REPS +
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' (pow: ' + DEFAULT_POW_REPS + ')' +
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'\n\t\t MAX DIGITS: ' + DEFAULT_MAX_DIGITS +
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' (pow: ' + DEFAULT_POW_MAX_DIGITS + ')' +
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'\n\t\t DECIMAL PLACES: ' + DEFAULT_PLACES + '\n' +
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'\n E.g. node bigtime\n\tnode bigtime minus\n\tnode bigtime add 100000' +
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'\n\tnode bigtime times 20000 100\n\tnode bigtime div 100000 50 20' +
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'\n\tnode bigtime 9000\n\tnode bigtime 1000000 20\n' +
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'\n To show memory usage, include an argument m or -m' +
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'\n E.g. node bigtime m add');
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} else {
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BigNumber.config({
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EXPONENTIAL_AT: 1E9,
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RANGE: 1E9,
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ERRORS: false,
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MODULO_MODE: 1,
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POW_PRECISION: 10000
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});
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Number.prototype.toPlainString = Number.prototype.toString;
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for (i = 0; i < args.length; i++) {
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arg = args[i];
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if (isFinite(arg)) {
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arg = Math.abs(parseInt(arg));
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if (reps == null)
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reps = arg <= 1e10 ? arg : 0;
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else if (max == null)
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max = arg <= 1e6 ? arg : 0;
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else if (decimalPlaces == null)
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decimalPlaces = arg <= 1e6 ? arg : DEFAULT_PLACES;
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} else if (/^-*m$/i.test(arg))
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showMemory = true;
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else if (method == null)
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method = arg;
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}
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for (i = 0;
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i < Ms.length && (methodIndex = Ms[i].indexOf(method)) == -1;
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i++) {}
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bnM = methodIndex == -1
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? bnMs1[methodIndex = Math.floor(Math.random() * bdMs.length)]
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: (Ms[i][0] == 'add' ? bnMs1 : Ms[i])[methodIndex];
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bdM = bdMs[methodIndex];
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if (!reps)
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reps = bdM == 'pow' ? DEFAULT_POW_REPS : DEFAULT_REPS;
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if (!max)
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max = bdM == 'pow' ? DEFAULT_POW_MAX_DIGITS : DEFAULT_MAX_DIGITS;
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if (decimalPlaces == null)
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decimalPlaces = DEFAULT_PLACES;
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xs = [reps], ys = [reps], bdRs = [reps], bnRs = [reps];
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BD.rss = BD.hU = BD.hT = BN.rss = BN.hU = BN.hT = 0;
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showMemory = showMemory || ALWAYS_SHOW_MEMORY;
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console.log('\n BigNumber %s vs BigDecimal %s\n' +
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'\n Method calls: %d\n\n Random operands: %d', bnM, bdM, reps,
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bdM == 'abs' || bdM == 'negate' || bdM == 'abs' ? reps : reps * 2);
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console.log(' Max. digits of operands: %d', max);
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if (bdM == 'divide') {
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rounding = Math.floor(Math.random() * 7);
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console.log('\n Decimal places: %d\n Rounding mode: %d', decimalPlaces, rounding);
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BigNumber.config({ DECIMAL_PLACES: decimalPlaces, ROUNDING_MODE: rounding });
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}
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process.stdout.write('\n Testing started');
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outer:
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for (; reps > 0; reps -= 1e4) {
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j = Math.min(reps, 1e4);
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// GENERATE RANDOM OPERANDS
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for (i = 0; i < j; i++) {
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xs[i] = getRandom(max);
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}
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if (bdM == 'pow') {
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for (i = 0; i < j; i++) {
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ys[i] = Math.floor(Math.random() * (MAX_POWER + 1));
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}
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} else if (bdM != 'abs' && bdM != 'negate') {
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for (i = 0; i < j; i++) {
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ys[i] = getRandom(max);
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}
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}
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getMemory();
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// BigDecimal
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if (bdM == 'divide') {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bdRs[i] = new BigDecimal(xs[i])[bdM](new BigDecimal(ys[i]),
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decimalPlaces, rounding);
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}
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bdT = +new Date() - start;
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} else if (bdM == 'pow') {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bdRs[i] = new BigDecimal(xs[i])[bdM](ys[i]);
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}
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bdT = +new Date() - start;
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} else if (bdM == 'abs' || bdM == 'negate') {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bdRs[i] = new BigDecimal(xs[i])[bdM]();
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}
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bdT = +new Date() - start;
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} else {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bdRs[i] = new BigDecimal(xs[i])[bdM](new BigDecimal(ys[i]));
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}
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bdT = +new Date() - start;
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}
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getMemory(BD);
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// BigNumber
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if (bdM == 'pow') {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bnRs[i] = new BigNumber(xs[i])[bnM](ys[i]);
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}
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bnT = +new Date() - start;
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} else if (bdM == 'abs' || bdM == 'negate') {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bnRs[i] = new BigNumber(xs[i])[bnM]();
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}
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bnT = +new Date() - start;
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} else {
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start = +new Date();
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for (i = 0; i < j; i++) {
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bnRs[i] = new BigNumber(xs[i])[bnM](new BigNumber(ys[i]));
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}
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bnT = +new Date() - start;
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}
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getMemory(BN);
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// CHECK FOR MISMATCHES
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for (i = 0; i < j; i++) {
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bnR = bnRs[i].toString();
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bdR = bdRs[i].toPlainString();
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// Strip any trailing zeros from non-integer BigDecimals
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if (bdR.indexOf('.') != -1) {
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bdR = bdR.replace(/\.?0+$/, '');
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}
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if (bdR !== bnR) {
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console.log('\n breaking on first mismatch (result number %d):' +
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'\n\n BigDecimal: %s\n BigNumber: %s', i, bdR, bnR);
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console.log('\n x: %s\n y: %s', xs[i], ys[i]);
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if (bdM == 'divide')
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console.log('\n dp: %d\n r: %d',decimalPlaces, rounding);
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break outer;
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}
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}
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bdTotal += bdT;
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bnTotal += bnT;
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process.stdout.write(' .');
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}
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// TIMINGS SUMMARY
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if (i == j) {
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console.log(' done\n\n No mismatches.');
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if (showMemory) {
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console.log('\n Change in memory usage (KB):' +
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'\n\tBigDecimal' + getMemoryTotals(BD) +
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'\n\tBigNumber ' + getMemoryTotals(BN));
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}
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console.log('\n Time taken:' +
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'\n\tBigDecimal ' + (bdTotal || '<1') + ' ms' +
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'\n\tBigNumber ' + (bnTotal || '<1') + ' ms\n\n ' +
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getFastest(bnTotal, bdTotal) + '\n');
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}
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}
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