Benchmark: Dict vs. Map vs. Array (all entries)

Script Preparation code:

var dict= {}
for (var i=0; i<50000; i++) {
  dict['abc_'+i] = i;
}

var map= new Map()
for (var i=0; i<50000; i++) {
  map.set('abc_'+i, i);
}

var arr = []
for (var i=0; i<50000; i++) {
  arr.push(i);
}

Tests:

Dictionary
let c = 0 for (i=0; i<10000; i+=1) { c += dict['abc_'+i]}
Array
let c = 0 for (i=0; i<10000; i+=1) { c += arr[i]}
Map
let c = 0 for (i=0; i<10000; i+=1) { c += map.get('abc_'+i)}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Dictionary
Array
Map

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser/OS: Chrome 132 on Windows

View result in a separate tab

Test name	Executions per second
Dictionary	1740.5 Ops/sec
Array	5136.0 Ops/sec
Map	1452.2 Ops/sec

Related benchmarks:

Array constructor vs literal
Array constructor vs literal performance - 1000 items
Dict vs. Map vs. Array
Map vs Object - the real test
Dict vs. Map vs. Array ( complete iteration)
Dict vs. Map vs. Array ( complete iteration 2)
Dict vs. Map vs. Array ( complete iteration 3)
Dict vs. Map vs. Array ( complete iteration Ultimate Collection)
Dict vs. Map vs. Array ( complete iteration 4)

Dict vs. Map vs. Array (all entries) (version: 1)

Large dictionary - how worse is it from array with direct reference? And how does Map perform?

Comparing performance of: Dictionary vs Array vs Map

Created: one year ago by: Guest

Jump to the latest result

Dictionary

Array

Map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A