Benchmark: [JS] Object.keys + map vs for...in + push - MeasureThat.net

Script Preparation code:

const data = [
    {
        "FACT_CD": "",
        "WH_CD": "",
        "LOC_TP": "",
        "LOC_NM": "",
        "RACK_TP": "",
        "RACK_DESC": "",
        "UNIT_TP": "",
        "UNIT_DESC": "",
        "SAP_TP": "",
        "SAP_NM": "",
        "USE_CC": ""
    }
]

Tests:

Object.keys + map
Object.keys(data[0]).map(prop => ( { wch: Math.max(prop.toString().length, ...data.map(obj => obj[prop] ? obj[prop].toString().length : 0)) } ));
for...in + push
const columnWidths = []; for (const prop in data[0]) { const maxWidth = Math.max(prop.toString().length, ...data.map(obj => obj[prop] ? obj[prop].toString().length : 0)); columnWidths.push({ wch: maxWidth }); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.keys + map
for...in + push

Fastest: N/A

Slowest: N/A

Latest run results:

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