CODEWITHSUNDEEP
javascriptbenchmarkingperformancejsperf
Praveen Prasad
Praveen Prasad

Reputation: 32117

Explain this JsPerf.com result

I ran a test on this website http://jsperf.com/

This is screen shot of a jsperf test i ran

I want some one to explain

  1. What does green and pink signifies
  2. What is ops per second
  3. what is 95,814,583
  4. what is +- 1.95% is
  5. whats does 'fastest' and 'slower' means

Upvotes: 9

Views: 1468

Answers (1)

Mathias Bynens
Mathias Bynens

Reputation: 149694

Hey, I’m the creator of jsPerf.

  1. The fastest test(s) get a green background. The slowest test(s) get a pink/red background.
  2. See below.
  3. It means the test can run about 95,814,583 times a second.
  4. ± 1.95 is the margin of error. (For more info, see below.)
  5. “fastest” means this is the fastest test in the test case. 19% slower means this test is 19% slower than the fastest test in the test case.

See John-David Dalton’s answer to “How does jsPerf work?” for a detailed explanation of the following:

  • What is “ops/sec”?
  • How many iterations does it do?
  • On what basis does it calculate which is faster?
  • What is the formula behind these calculations?

Upvotes: 22

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