Run results for: Immer vs shallow vs ramda assocPath (nested structure light)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

shallow copy

2.6M/s

ramda assocPath

2.2M/s

immer

94K/s

View exact numbers

Test name	Executions per second
✓ shallow copy	2,627,354 Ops/sec
ramda assocPath	2,239,383 Ops/sec
immer	94,059 Ops/sec

HTML Preparation code:

<script src="https://unpkg.com/immer@9.0.7/dist/immer.umd.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

Script Preparation code:

var { assocPath } = R

var object = { one: 1, two: 2, three: 3, four: 4, five: 5, array: Array.from({ length: 10000 }).map(() => Math.random()) }

var INITIAL_DATA = {
  one: { two: { three: { four: { five: 5, object }, object }, object }, object },
  two: { three: { four: { five: 5, object }, object }, object },
  three: { four: { five: 5, object }, object },
  four: { five: 5, object },
  five: 5
}

var produce = immer.default

Tests:

immer
data = produce(INITIAL_DATA, draft => { draft.four.five = 0; })
shallow copy
data = { four: { five: 0, ...INITIAL_DATA.four }, ...INITIAL_DATA }
ramda assocPath
data = assocPath(['four', 'five'], 0, INITIAL_DATA)