Run results for: split vs split vs split vs slice+indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; rv:56.0) Gecko/20100101 Firefox/56.0

Browser: Firefox 56

Operating system: Windows 7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
split1	1556901.4 Ops/sec
split10	1541117.1 Ops/sec
split0	586963.5 Ops/sec
slice	7961358.5 Ops/sec

Script Preparation code:

var a = "slkfzesqdmkfbaczeiuncamzieurnamziuenramcizurnmcaizunermdzdezedzdjg qmzzpeoriucbyazpoeruycbaozecyrbazdzedksjdf zedazerbcazoyrbcoaizuyebrcoizedzmkqjsd fzedzedzedzedmkj";

Tests:

split1
a.split(" ", 1);
split10
a.split(" ", 1)[0];
split0
a.split(" ")[0];
slice
a.slice(0, a.indexOf(" "));

Run results for: split vs split vs split vs slice+indexOf

split1

split10

split0

slice