Run results for: Inserting and Searching in Map vs Object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Search in small Map

2.9M/s

Search in small POJO

159K/s

insert in small POJO

131K/s

Insert in small Map

74K/s

Search in large POJO

1K/s

Insert in large POJO

892/s

Search in large Map

348/s

Insert in large Map

214/s

View exact numbers

Test name	Executions per second
✓ Search in small Map	2,926,361 Ops/sec
Search in small POJO	159,294 Ops/sec
insert in small POJO	130,689 Ops/sec
Insert in small Map	73,796 Ops/sec
Search in large POJO	1,014 Ops/sec
Insert in large POJO	892 Ops/sec
Search in large Map	348 Ops/sec
Insert in large Map	214 Ops/sec

Script Preparation code:

var small_pojo = {};
var small_map = new Map();
var small_vals = [];

var large_pojo = {};
var large_map = new Map();
var large_vals = [];

for(let i = 0; i < 1000; i++) {
  let val = btoa(Math.random()); // randomish string
  
  small_vals.push(val);
}

for(let i = 0; i < 100000; i++) {
  let val = btoa(Math.random()); // randomish string
  
  large_vals.push(val);
}

Tests:

Insert in small Map
small_vals.forEach(v => { small_map.set(v, v); });
insert in small POJO
small_vals.forEach(v => { small_pojo[v] = v; });
Insert in large Map
large_vals.forEach(v => { large_map.set(v, v); });
Insert in large POJO
large_vals.forEach(v => { large_pojo[v] = v; });
Search in small Map
small_vals.forEach(v => { return small_map.get(v); })
Search in small POJO
small_vals.forEach(v => { return small_pojo[v]; })
Search in large Map
large_vals.forEach(v => { return large_map.get(v); })
Search in large POJO
large_vals.forEach(v => { return large_pojo[v]; })