Run results for: map - named function vs anonymous function

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
test1	5441159.0 Ops/sec
test2	7777749.0 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