Run results for: i++ vs ++i vs i += 1 vs i = i + 1 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:86.0) Gecko/20100101 Firefox/86.0

Browser: Firefox 86

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
i++	309302.8 Ops/sec
++i	317284.6 Ops/sec
i += 1	332533.5 Ops/sec
i = i + 1	2523894.8 Ops/sec

Script Preparation code:

var a = [0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9];
var c;

Tests:

i++
for(i = 0, len = a.length; i < len; i++) { c = a[i]; }
++i
for(i = 0, len = a.length; i < len; ++i) { c = a[i]; }
i += 1
for(i = 0, len = a.length; i < len; i += 1) { c = a[i]; }
i = i + 1
for(i = 0, len = a.length; i < len; i = i + 1) { c = a[i]; }