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https://github.com/josdejong/mathjs.git
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a3360d316b
* Add unit parser benchmark * Add LRU to memoize function * Memoize _findUnit This fixes some performance issues in my heavily-unit-parsing app. Another idea might be to do an index of reversed unit names, and search in that, but this is much easier to implement and still should provide an improvement in the majority of cases (since I'd imagine that most users tend to prefer a few units at a time, depending on their application). * Optimize memoize function This should be just a little bit faster than before by using Maps, which have less overhead than javascript objects.
41 lines
1.0 KiB
JavaScript
41 lines
1.0 KiB
JavaScript
// test performance of the unit expression parser in node.js
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// browserify benchmark/unit_parser.js -o ./benchmark_unit_parser.js
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const Benchmark = require('benchmark')
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const math = require('../..')
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// expose on window when using bundled in a browser
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if (typeof window !== 'undefined') {
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window.Benchmark = Benchmark
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}
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const expr = '[1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm]'
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console.log('Unit.parse expression: mm')
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console.log('evaluate expression:', expr)
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let total = 0
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const suite = new Benchmark.Suite()
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suite
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.add('Unit.parse', function () {
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total += math.Unit.parse('mm').dimensions[0]
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})
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.add('evaluate', function () {
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total += math.evaluate(expr).size()[0]
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})
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.on('cycle', function (event) {
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console.log(String(event.target))
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})
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.on('complete', function () {
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// we count at total to prevent the browsers from not executing
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// the benchmarks ("dead code") when the results would not be used.
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if (total > 5) {
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console.log('')
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} else {
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console.log('')
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}
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})
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.run()
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