Benchmark: Map for map vs entries.map

Script Preparation code:

var obj = {
  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 map = new Map(Object.entries(obj));

Tests:

Map - for of kv
const arr = []; for (const [key, value] of map) { arr.push(value) }
Map - forEach
const arr = map.entries().map((value) => value);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map - for of kv
Map - forEach

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Map - for of kv	7650188.0 Ops/sec
Map - forEach	58538128.0 Ops/sec

Related benchmarks:

Map for map vs entries.map (version: 0)

Comparing performance of: Map - for of kv vs Map - forEach

Created: one year ago by: Guest

Jump to the latest result

Map - for of kv

Map - forEach

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A