Run results for: Test map size 2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser: Chrome 79

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Size 10k	13321.5 Ops/sec
Size 100k	13309.5 Ops/sec
Size 1000k	13214.0 Ops/sec
Constant	1906340.8 Ops/sec

HTML Preparation code:

<script>
function randomString()
{
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    for( var i=0; i < 20; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
}

var randomKey = [];
var randomVals = [];

for (var i=0; i < 1001000; i++) {
   randomKey[i] = randomString();
   randomVals[i] = randomString();
}
</script>

Script Preparation code:

var map10k = new Map();
var map100k = new Map();
var map1000k = new Map();

for (var i=0; i < 10000; i++) {
   map10k.set(randomKey[i], randomVals[i]);
}
for (var i=0; i < 100000; i++) {
   map100k.set(randomKey[i], randomVals[i]);
}
for (var i=0; i < 1000000; i++) {
   map1000k.set(randomKey[i], randomVals[i]);
}

Tests:

Size 10k
for (var i=0; i < 1000; i++) { var val = map10k.size; }
Size 100k
for (var i=0; i < 1000; i++) { var val = map100k.size; }
Size 1000k
for (var i=0; i < 1000; i++) { var val = map1000k.size; }
Constant
for (var i=0; i < 1000; i++) { var val = 42; }

Run results for: Test map size 2

Size 10k

Size 100k

Size 1000k

Constant