Run results for: List filter comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0

Browser: Firefox 81

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Combined filter	14522519.0 Ops/sec
Seperate filters	7555097.5 Ops/sec

Script Preparation code:

var list = [
  { type: "one", value: 4 },
  { type: "one", value: 1 },
  { type: "one", value: 4 },
  { type: "one", value: 1 },
  { type: "one", value: 4 },
  { type: "two", value: 1 },
  { type: "two", value: 1 },
  { type: "one", value: 1 },
  { type: "one", value: 4 },
  { type: "one", value: 1 },
  { type: "one", value: 1 },
  { type: "two", value: 4 },
  { type: "two", value: 1 },
  { type: "two", value: 1 },
  { type: "two", value: 4 },
]

Tests:

Combined filter
var found = list.filter(item => item.type == "one" && item.value == 1);
Seperate filters
var found = list.filter(item => item.type == "one").filter(item => item.value == 1);

Run results for: List filter comparison

Combined filter

Seperate filters