Run results for: Date JsonReviver4

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36

Browser: Chrome 99

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
1	37.8 Ops/sec
2	15.1 Ops/sec
3	33.8 Ops/sec
4	31.0 Ops/sec
5	23.6 Ops/sec
6	17.6 Ops/sec
7	34.4 Ops/sec
8	33.7 Ops/sec
9	25.4 Ops/sec
10	30.5 Ops/sec
11	24.4 Ops/sec
12	38.8 Ops/sec
13	38.6 Ops/sec

Script Preparation code:

var input = [];

for (i = 2; i <= 100000; i++) {
    const date = new Date(Math.random()*1000);
  
    const value = i % 2 === 0 ? date.toISOString() : 'some random value';
    const key = i % 2 === 0 ? 'businessDate' : 'some random key';
  
    input.push({
        key,
        value
    });
  
    input.push({
        key: 'index',
        value: i
    });
  
  input.push({
        key: 'updatedAt',
        value: i
    });
}

Tests:

1
const result = input.map(x=>{ if ( typeof x.value === 'string' && (x.key === 'businessDate' || x.key=== 'startDate' || x.key === 'endDate' || x.key === 'updatedAt') ) { return new Date(x.value); } return x.value; });
2
const result = input.map(x=>{ if (typeof x.value === 'string') { const date = new Date(x.value); return isNaN(date) ? x.value : date; } return x.value; });
3
const result = input.map(x=>{ if (x.key.endsWith('Date') && typeof x.value === 'string') { return new Date(x.value); } return x.value; });
4
const result = input.map(x=>{ if (typeof x.value === 'string' && /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})/.test(x.value)) { return new Date(x.value); } return x.value; });
5
const result = input.map(x=>{ if (/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})/.test(x.value)) { return new Date(x.value); } return x.value; });
6
const dateFields = ['businessDate', 'startDate', 'endDate', 'updatedAt'] const result = input.map(x=>{ if (dateFields.includes(x.key)) { return new Date(x.value); } return x.value; });
7
const dateFields = ['businessDate', 'startDate', 'endDate', 'updatedAt'] const result = input.map(x=>{ if (dateFields.includes(x.key) && typeof x.value === 'string') { return new Date(x.value); } return x.value; });
8
const dateFields = new Set(['businessDate', 'startDate', 'endDate', 'updatedAt']); const result = input.map(x=>{ if (dateFields.has(x.key) && typeof x.value === 'string') { return new Date(x.value); } return x.value; });
9
const dateFields = ['businessDate', 'startDate', 'endDate', 'updatedAt'] const result = input.map(x=>{ if (dateFields.includes(x.key) && typeof x.value === 'string') { const date = new Date(x.value); return isNaN(date) ? x.Value : date; } return x.value; });
10
const dateFields = ['businessDate', 'startDate', 'endDate', 'updatedAt'] const result = input.map(x=>{ if (dateFields.includes(x.key) && typeof x.value === 'string' && /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})/.test(x.value)) { return new Date(x.value); } return x.value; });
11
const dateFields = ['businessDate', 'startDate', 'endDate', 'updatedAt'] const result = input.map(x=>{ if (dateFields.includes(x.key) && /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})/.test(x.value)) { return new Date(x.value); } return x.value; });
12
const result = input.map(x=>{ if (typeof x.value !== 'string'){ return x.value; } if (x.key === 'businessDate' || x.key=== 'startDate' || x.key === 'endDate' || x.key === 'updatedAt' ){ return new Date(x.value); } return x.value; });
13
const result = input.map(x=>{ if (typeof x.value !== 'string'){ return x.value; } switch (x.key){ case 'businessDate': case 'startDate': case 'endDate': case 'updatedAt': return new Date(x.value); break; default: return x.value; break; } });

Run results for: Date JsonReviver4

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