jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

deep clone & slice

Benchmark created on March 20, 2024

Setup

var test = [
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
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{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
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{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
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{testdata11: 'asdf'},
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{testdata11: 'asdf'},
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{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
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{testdata10: 'asdf'},
{testdata11: 'asdf'},
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{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
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{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
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{testdata10: 'asdf'},
{testdata11: 'asdf'},
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{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
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{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
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{testdata7: 'asdf'},
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{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
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{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
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{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
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{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
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{testdata1: 'asdf'},
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{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},
{testdata1: 'asdf'},
{testdata2: 'asdf'},
{testdata3: 'asdf'},
{testdata4: 'asdf'},
{testdata5: 'asdf'},
{testdata6: 'asdf'},
{testdata7: 'asdf'},
{testdata8: 'asdf'},
{testdata9: 'asdf'},
{testdata10: 'asdf'},
{testdata11: 'asdf'},

]

Test runner

Ready to run.

Testing in
Test		Ops/sec
deep copy test	`var copy = structuredClone(test)`	ready
slice multiple times	`var i = 0; while (i < 10) { var sliced = [ ...test.slice(0, 500), { testdataasdf: 'asdf' }, test.slice(500+ 1), ]; i++; }`	ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published on March 20, 2024
Revision 2: published on March 20, 2024