Run results for: Lodash vs Ramda vs Remeda

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
Lodash	499.0 Ops/sec
Ramda	315.9 Ops/sec
Remeda	305.3 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/ramda/0.31.3/ramda.min.js'></script>

Script Preparation code:

const N = 80_000;
const DATA = Array.from({ length: N }, (_, i) => ({
  id: i,
  active: (i & 1) === 0,               // half active
  score: (i * 7) % 100,                // 0..99
  group: (i % 25),                     // 25 groups
  name: "user_" + i,
  tags: [i % 5, i % 7, i % 11],
}));
window.DATA = DATA;

// ---- Remeda loader: attach to window.Rm (avoids clash with Ramda's R)
window.RmReady = (async () => {
  if (!window.Rm) {
    const m = await import('https://esm.sh/remeda@2');
    // Expose the namespace under 'Rm' to avoid 'R' collision with Ramda
    window.Rm = m;
  }
})();

Tests:

Lodash
const res = _(DATA) .filter(u => u.active && u.score > 50) .groupBy('group') .mapValues(arr => _.sumBy(arr, 'score')) .value();
Ramda
// R.pipe is available globally from ramda const res = R.pipe( R.filter(u => u.active && u.score > 50), R.groupBy(u => String(u.group)), R.map(arr => R.sum(R.pluck('score', arr))) )(DATA);
Remeda
// Ensure Remeda is present if (!window.Rm) throw new Error("Remeda not loaded"); // Use Rm.pipe to avoid clashing with Ramda's R const Rm = window.Rm; const res = Rm.pipe( DATA, Rm.filter(u => u.active && u.score > 50), Rm.groupBy(u => String(u.group)), Rm.mapValues(arr => Rm.sumBy(arr, x => x.score)) );