Benchmark: New obj vs not - MeasureThat.net

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

    const newerValue = 'newer-value';
    const olderValue = 'older-value';
    const unchangedValue = 'unchanged-value';
    const newerTimestamp = '200000000000000:00000:my-client:v01';
    const olderTimestamp = '10000000000000:00000:my-client:v01';
    const unchangedTimestamp = '00000000000000:00000:my-client:v01';

    var newPatch = {
        inspection: {
            name: newerValue,
            note: olderValue,
            timestamps: {
                name: newerTimestamp,
                note: olderTimestamp,
            },
            areas: [{
                id: '1234',
                name: newerValue,
                note: olderValue,
                timestamps: {
                    name: newerTimestamp,
                    note: olderTimestamp,
                },
                items: [{
                    id: '1234',
                    name: newerValue,
                    note: olderValue,
                    timestamps: {
                        name: newerTimestamp,
                        note: olderTimestamp,
                    },
                }, ],
            }, ],
        },
    };

    var existingPatch = {
        inspection: {
            name: olderValue,
            note: newerValue,
            other: unchangedValue,
            timestamps: {
                name: olderTimestamp,
                note: newerTimestamp,
                other: unchangedTimestamp,
            },
            areas: [{
                id: '1234',
                name: olderValue,
                note: newerValue,
                other: unchangedValue,
                timestamps: {
                    name: olderTimestamp,
                    note: newerTimestamp,
                    other: unchangedTimestamp,
                },
                items: [{
                        id: '1234',
                        name: olderValue,
                        note: newerValue,
                        other: unchangedValue,
                        timestamps: {
                            name: olderTimestamp,
                            note: newerTimestamp,
                            other: unchangedTimestamp,
                        },
                    },
                    {
                        id: 'unchanged-item',
                        name: unchangedValue,
                        note: unchangedValue,
                        other: unchangedValue,
                        timestamps: {
                            name: unchangedValue,
                            note: unchangedValue,
                            other: unchangedTimestamp,
                        },
                    },
                ],
            }, ],
        },
    };

    var compareTs = (ts1, ts2, value1, value2) => {
        if (!ts1 && !ts2) {
            return undefined;
        }
        if (!ts1) {
            return value2;
        }
        if (!ts2) {
            return value1;
        }
        const compareRes = ts1.localeCompare(ts2);
        if (compareRes <= 0) {
            return value2;
        }
        return value1;
    };

Tests:

New object
var mergeWithTimestampsCustomizer = ( targetValue, srcValue, key, target, source, ) => { // TODO: way to standardize uuid key if (_.isArray(targetValue)) { return _.values( _.mergeWith(_.keyBy(targetValue, 'id'), _.keyBy(srcValue, 'id'), mergeWithTimestampsCustomizer), ); } if (target?.timestamps?.[key] || source?.timestamps?.[key]) { return compareTs(target?.timestamps?.[key], source?.timestamps?.[key], targetValue, srcValue); } // TODO: way to standardize timestamps key if (key === 'timestamps') { return _.mergeWith({}, targetValue, srcValue, (v, srcV) => { return compareTs(v, srcV, v, srcV); }); } return undefined; // Fallback to lodash's merge }; const mergeWithTimestamps = (existing, newValues) => { return _.mergeWith({}, existing, newValues, mergeWithTimestampsCustomizer); }; mergeWithTimestamps(newPatch, existingPatch);
Mutating object
var mergeWithTimestampsCustomizer = ( targetValue, srcValue, key, target, source, ) => { // TODO: way to standardize uuid key if (_.isArray(targetValue)) { return _.values( _.mergeWith(_.keyBy(targetValue, 'id'), _.keyBy(srcValue, 'id'), mergeWithTimestampsCustomizer), ); } if (target?.timestamps?.[key] || source?.timestamps?.[key]) { return compareTs(target?.timestamps?.[key], source?.timestamps?.[key], targetValue, srcValue); } // TODO: way to standardize timestamps key if (key === 'timestamps') { return _.mergeWith(targetValue, srcValue, (v, srcV) => { return compareTs(v, srcV, v, srcV); }); } return undefined; // Fallback to lodash's merge }; const mergeWithTimestamps = (existing, newValues) => { return _.mergeWith(existing, newValues, mergeWithTimestampsCustomizer); }; mergeWithTimestamps(newPatch, existingPatch);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
New object
Mutating object

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:105.0) Gecko/20100101 Firefox/105.0

Browser/OS: Firefox 105 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
New object	27754.0 Ops/sec
Mutating object	60007.9 Ops/sec

New obj vs not (version: 0)

Comparing performance of: New object vs Mutating object

Created: one year ago by: Registered User

Jump to the latest result

New object

Mutating object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A