Test case created by Wraithan 29 minutes ago < script > Benchmark. prototype . setup = function ( ) { var arr = [ ] } ; < / script > Warning! For accurate results, please disable Firebug before running the tests. (Why?) Java applet disabled. To run the tests, please enable JavaScript and reload the page. Testing in unknown unknown Test Ops/sec isArray if ( Array. isArray ( arr ) ) { return true } pending… instanceof if ( arr instanceof Array ) { return true } pending… You can edit these tests or add even more tests to this page by appending /edit to the URL. Name * Email * (only used for Gravatar) URL Message * Markdown syntax is allowed Are you a spammer? (just answer the question and repeat the last letter) Add test · Latest · Popular · FAQ · Donate · twitter: @jsperf · source on GitHub · Benchmark.js · by...