Run results for: (very) short array duplication - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
while loop	439652.2 Ops/sec
slice	1167113.5 Ops/sec
for loop	442925.4 Ops/sec
Array.from	936823.8 Ops/sec
es6	1152311.0 Ops/sec
concat	1146837.2 Ops/sec

Tests:

while loop
a = Array(3); b = Array(3); i = a.length; while(i--) b[i] = a[i];
AخA

a = Array(3);
b = Array(3);
i = a.length;
while(i--) b[i] = a[i];
slice
a = Array(3); b = a.slice(0);
a = Array(3);
b = a.slice(0);

for loop

a = Array(3);
b = Array(3);
for(var i = 0, len = a.length; i < len; ++i)
   b[i] = a[i];

 
a = Array(3);b = Array(3);for(var i = 0, len = a.length; i < len; ++i)   b[i] = a[i];

Array.from
a = Array(3); b = Array.from(a);
a = Array(3);
b = Array.from(a);
es6
a = Array(3); b = [...a];
a = Array(3);
b = [...a];
concat
a = Array(3); b = [].concat(a)
a = Array(3);
b = [].concat(a)