Benchmark: merge maps big - MeasureThat.net

Script Preparation code:

const arr = [];
const arr2 = [];
for (let i = 0; i < 10000; i++) {
    arr.push([i, 'Val' + i]);
    arr2.push(['key' + i, 'Val' + i]);
}

var map1 = new Map(arr)
var map2 = new Map(arr2)

const arr3 = [];
for (let i = 0; i < 1000; i++) {
    arr3.push(['key2' + i, 'Val' + i]);
}
var map9 = new Map(arr3)

Tests:

Merge spread
var map3 = new Map([...map1, ...map2]);
merge foreach
var map4 = new Map(map1) map2.forEach((val, key) => {map4.set(key, val)})
merge 2 foreach
var map4 = new Map() map1.forEach((val, key) => {map4.set(key, val)}) map2.forEach((val, key) => {map4.set(key, val)})
update big map
map9.forEach( (val,key) => {map1.set(key,val)})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Merge spread
merge foreach
merge 2 foreach
update big map

Fastest: N/A

Slowest: N/A

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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/103.0.0.0 Safari/537.36

Browser/OS: Chrome 103 on Windows

View result in a separate tab

Test name	Executions per second
Merge spread	679.0 Ops/sec
merge foreach	828.4 Ops/sec
merge 2 foreach	884.5 Ops/sec
update big map	10470.4 Ops/sec

merge maps big (version: 0)

Comparing performance of: Merge spread vs merge foreach vs merge 2 foreach vs update big map

Created: one year ago by: Guest

Jump to the latest result

Merge spread

merge foreach

merge 2 foreach

update big map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A