Run results for: Array filter falsy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0

Browser: Firefox 69

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
e => e filter	162.0 Ops/sec
Boolean filter	156.0 Ops/sec
function(item) {return item}	130.9 Ops/sec
function(item) {return Boolean(item)}	48.1 Ops/sec

Script Preparation code:

var test = [];
for (let step = 0; step < 999999; step++) {
  test.push(Boolean(step%2));
}

Tests:

e => e filter
var res1 = test.filter(e => e);
Boolean filter
var res2 = test.filter(Boolean);
function(item) {return item}
var res3 = test.filter(function(e) {return e});
function(item) {return Boolean(item)}
var res4 = test.filter(function(e) {return Boolean(e)});