35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
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const x = [];
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for (let i = 0; i < 50_000_000; i++) {
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x[i] = Math.random();
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}
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const for_test_list = [...x]
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const for_timings = []
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for (let i = 0; i < 10; i++) {
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const startTime = performance.now()
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for (let i = 0; i < for_test_list.length; i++) {
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for_test_list[i] * 2
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}
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const timeElapsed = performance.now() - startTime
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for_timings.push(timeElapsed)
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console.log(`for#${i + 1} time: ${timeElapsed.toFixed(4)} ms`)
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}
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console.log(`Average 'for' time: ${(for_timings.reduce((a,b) => a+b)/for_timings.length).toFixed(4)} ms`)
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print_xvals(for_test_list)
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const map_test_list = [...x]
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const map_timings = []
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for (let i = 0; i < 10; i++) {
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const startTime = performance.now()
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map_test_list.map(val => val*2)
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const timeElapsed = performance.now() - startTime
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map_timings.push(timeElapsed)
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console.log(`map#${i + 1} time: ${timeElapsed.toFixed(4)}`)
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}
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console.log(`Average 'map' time: ${(map_timings.reduce((a,b) => a+b)/for_timings.length).toFixed(4)} ms`)
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print_xvals(map_test_list)
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function print_xvals(x) {
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console.log(x[0], x[Math.floor(x.length / 2)], x[x.length - 1])
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}
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