Run results for: map - named function vs anonymous function

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Browser: Chrome 63

Operating system: Windows

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
test1	949155.2 Ops/sec
test2	1099160.9 Ops/sec

Script Preparation code:

function xxx (x){return x.slice()};
a=[[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
   [2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2],
   [3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3]
   ];
function t1 () { return a.map(xxx) }
function t2 () { return a.map(x=>x.slice()) }

Tests:

test1
t1();
test2
t2();

Run results for: map - named function vs anonymous function

test1

test2