Run results for: filter-map vs reduce with spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

map-filter

42K/s

reduce

406/s

View exact numbers

Test name	Executions per second
✓ map-filter	42,206 Ops/sec
reduce	406 Ops/sec

Script Preparation code:

a=[];
for(i=0;i<1000;i++) a.push(Number(i)/1000);
var filtering=x=>(x*114514)%1>0.5;
var mapping=x=>x+0.1919;
var reducing=(acc,x)=>{
  var value=mapping(x);
  if(!filtering(value)) return acc;
  return [...acc, value];
}

Tests:

map-filter
a.filter(filtering).map(mapping);
reduce
a.reduce(reducing,[]);

Run results for: filter-map vs reduce with spread

modified version of `map-filter vs reduce` that switches the order of operations

map-filter

reduce