Run results for: Closest in array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 OPR/40.0.2308.81

Browser: Opera 40

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Reduce	83922.7 Ops/sec
Map	88373.5 Ops/sec

Script Preparation code:

var arr = [1,2,3,4,5,6,7,8,9,10,11,22,33,44,55,66,77,88,99,111,112,114,115,116,400,600,1000];

Tests:

Reduce
var diff = (a, b) => Math.abs(a - b); var closestTo = target => arr => arr.reduce((prev, curr) => diff(prev, target) < diff(curr, target) ? prev : curr ); closestTo(100)(arr);
Map
var closestTo = target => arr => arr .map((num, index) => ({ index, diff: Math.abs(target - num), value: num })) .sort((a, b) => a.diff > b.diff)[0] .value; closestTo(100)(arr);

Run results for: Closest in array

Reduce

Map