Run results for: Flatmap vs reduce bydget 2.0

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Browser: Firefox 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Flatmap	1440969.8 Ops/sec
Reduce	941139.6 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var productData = {
    "name": "JX JAMIE BREEZE SUMMER LS SHIRT WVN SN",
    "masters": [{
        "name": "Racing Red",
        "selectable": true,
        "variants": [{
            "id": "V_5700679778595",
            "size": "S",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_5702804507390",
            "size": "M",
            "length": null,
            "isSelected": true
        }, {
            "id": "V_5702804507406",
            "size": "XL",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_5702804507451",
            "size": "XXL",
            "length": null,
            "isSelected": false
        }]
    }, {
        "name": "Morning Glory",
        "selectable": true,
        "variants": [{
            "id": "V_5702804507420",
            "size": "S",
            "length": null,
            "isSelected": true
        }, {
            "id": "V_5702804507444",
            "size": "L",
            "length": null,
            "isSelected": true
        }, {
            "id": "V_5702804507468",
            "size": "XL",
            "length": null,
            "isSelected": true
        }, {
            "id": "V_5702804534235",
            "size": "XXL",
            "length": null,
            "isSelected": true
        }]
    }, {
        "name": "Peacoat",
        "selectable": false,
        "variants": [{
            "id": "V_4582804507420",
            "size": "S",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_5252804507437",
            "size": "M",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_3582804507444",
            "size": "L",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_9522804507468",
            "size": "XL",
            "length": null,
            "isSelected": false
        }, {
            "id": "V_6452804534235",
            "size": "XXL",
            "length": null,
            "isSelected": false
        }]
    }]
}

Tests:

Flatmap
Array.from(new Set(productData.masters.flatMap((master) => master.variants.flatMap((size) => size.size))));
Reduce
Array.from(new Set( productData.masters.reduce((acc, master) => { const sizes = master.variants.reduce((variantAcc, variant) => { return [...variantAcc, variant.size]; }, []); return [...acc, ...sizes]; }, []), ))

Run results for: Flatmap vs reduce bydget 2.0

Flatmap

Reduce