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Perf tests
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| function performanceTests(...testCases) { | |
| const NUM_ITERATIONS = 5000000 | |
| let results = [] | |
| console.log(' -- Running tests... ') | |
| for (let i=0, l=testCases.length; i<l; i+=1) { | |
| results.push(testCases[i](NUM_ITERATIONS)) | |
| } | |
| let slowest = results[0] | |
| let fastest = results[0] | |
| for (let result of results) { | |
| if (result.averageTime > slowest.averageTime) | |
| slowest = result | |
| if (result.averageTime < fastest.averageTime) | |
| fastest = result | |
| } | |
| console.log(' -- Done running tests. ') | |
| console.log(` -- slowest: "${slowest.name}" -- `) | |
| console.log(` - total time: ${slowest.totalTime}`) | |
| console.log(` - average time: ${slowest.averageTime}`) | |
| console.log(` -- fastest: "${fastest.name}" -- `) | |
| console.log(` - total time: ${fastest.totalTime}`) | |
| console.log(` - average time: ${fastest.averageTime}`) | |
| } | |
| //function testCase(name, setup, preTest, test, postTest, teardown) { | |
| function testCase(name, {setup, preTest, test, postTest, teardown}) { | |
| return function(iterations) { | |
| if (!test) throw new Error('Um, you need a test.') | |
| const o = {} | |
| let totalTime = 0 | |
| let averageTime | |
| let startTime | |
| let endTime | |
| console.log(` -- Test "${name}" -- `) | |
| if (setup) setup(o) | |
| for (let i=0; i<iterations; i+=1) { | |
| if (preTest) preTest(o) | |
| startTime = performance.now() | |
| test(o) | |
| endTime = performance.now() | |
| totalTime += endTime - startTime | |
| if (postTest) postTest(o) | |
| } | |
| if (teardown) teardown(o) | |
| averageTime = totalTime/iterations | |
| console.log(` - total time: ${totalTime}`) | |
| console.log(` - average time: ${averageTime}`) | |
| return {name, totalTime, averageTime} | |
| } | |
| } | |
| performanceTests( | |
| testCase('with .has()', { | |
| setup(o) { | |
| o.s = new Set | |
| o.obj = {} | |
| o.s.add(o.obj) | |
| }, | |
| test(o) { | |
| if (!o.s.has(o.obj)) | |
| o.s.add(o.obj) | |
| }, | |
| }), | |
| testCase('without .has()', { | |
| setup(o) { | |
| o.s = new Set | |
| o.obj = {} | |
| o.s.add(o.obj) | |
| }, | |
| test(o) { | |
| o.s.add(o.obj) | |
| }, | |
| }) | |
| ) | |
| performanceTests( | |
| testCase('with check', { | |
| setup(o) { | |
| o.f = window.f | |
| o.b = window.b | |
| }, | |
| test(o) { | |
| if (o.f === o.b.parentNode) return | |
| o.f.appendChild(o.b) | |
| }, | |
| }), | |
| testCase('without check', { | |
| setup(o) { | |
| o.f = window.f | |
| o.b = window.b | |
| }, | |
| test(o) { | |
| o.f.appendChild(o.b) | |
| }, | |
| }) | |
| ) | |
| performanceTests( | |
| testCase('with check', { | |
| setup() { | |
| document.body.style.display = 'none' | |
| }, | |
| test() { | |
| if (document.body.style.display == 'none') | |
| document.body.style.display = 'block' | |
| }, | |
| }), | |
| testCase('without check', { | |
| setup() { | |
| document.body.style.display = 'none' | |
| }, | |
| test() { | |
| document.body.style.display = 'block' | |
| }, | |
| }) | |
| ) | |
| performanceTests( | |
| testCase('with check', { | |
| setup() { | |
| document.body.style.display = 'none' | |
| }, | |
| test() { | |
| if (document.body.style.display == 'none') | |
| document.body.style.display = 'block' | |
| }, | |
| }), | |
| testCase('without check', { | |
| setup() { | |
| document.body.style.display = 'none' | |
| }, | |
| test() { | |
| document.body.style.display = 'block' | |
| }, | |
| }) | |
| ) |
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