Run results for: Map Value Iteration

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
map.values()	5487520.0 Ops/sec
values array	7463937.0 Ops/sec
entries array	4464308.5 Ops/sec
values.values()	7488936.5 Ops/sec
values length-based	414877.2 Ops/sec

Script Preparation code:

var map = new Map(Object.entries({
  a: 1,
  b: 2,
  c: 3,
  d: 4,
  e: 5,
  f: 6,
  g: 7,
  h: 8,
  i: 9,
  j: 10,
  k: 11,
  l: 12,
  m: 13,
  n: 14,
  o: 15,
  p: 16,
  q: 17,
  r: 18,
  s: 19,
  t: 20,
  u: 21,
  v: 22,
  w: 23,
  x: 24,
  y: 25,
  z: 26
}));

var values = Array.from(map.values());
var entries = Array.from(map.entries());

Tests:

map.values()
let total = 0; for(const i of map.values()) total += i;
values array
let total = 0; for(const i of values) total += i;
entries array
let total = 0; for(const [k, i] of entries) total += i;
values.values()
let total = 0; for(const i of values.values()) total += i;
values length-based
let total = 0; const length = values.length; for(let i = 0; i < length; i++) total += values[i];

Run results for: Map Value Iteration

map.values()

values array

entries array

values.values()

values length-based