Run results for: lodash deepPick vs ramda deepPick

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.7

Device Platform: Mobile

Date tested: 9 months ago

Test name	Executions per second
lodash deepPick	31026.8 Ops/sec
ramda deepPick	66251.1 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src="//cdn.jsdelivr.net/npm/ramda@latest/dist/ramda.min.js"></script>

Script Preparation code:

const pickPathsLodash = (paths, obj) =>
    _.reduce(
        paths,
        (result, path) => {
            const value = _.get(obj, path);
            if (value !== undefined) {
                _.set(result, path, value);
            }
            return result;
        }, {}
    );

const pickPathsRamda = R.curry((paths, obj) =>
    R.reduce(
        (acc, path) => {
            const value = R.path(path, obj);
            return value !== undefined ? R.assocPath(path, value, acc) : acc;
        }, {},
        paths
    )
);

const largeSourceObject = {};
const pathsToKeep = [];
const pathsToKeepLodash = [];

for (let i = 0; i < 50; i++) {
  _.set(largeSourceObject, `level1_${i}.level2.level3`, { value: i, timestamp: Date.now() });
  // We'll pick about half of the paths
  if (i % 2 === 0) {
    pathsToKeep.push([`level1_${i}`, 'level2', 'level3', 'value']);
    pathsToKeepLodash.push(`level1_${i}.level2.level3.value`);
  }
}

Tests:

lodash deepPick
pickPathsLodash(pathsToKeepLodash, largeSourceObject);
ramda deepPick
pickPathsRamda(pathsToKeep, largeSourceObject);