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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Browser: Chrome 96

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
immer	24554.5 Ops/sec
shallow copy	559043.8 Ops/sec
ramda lens	212627.6 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 { set, lensPath } = 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.one.two.three.four.five = 0; })
shallow copy
data = { one: { two: { three: { four: { five: 0, ...INITIAL_DATA.one.two.three.four }, ...INITIAL_DATA.one.two.three }, ...INITIAL_DATA.one.two }, ...INITIAL_DATA.one }, ...INITIAL_DATA }
ramda lens
data = set(lensPath(['one', 'two', 'three', 'four', 'five']), 0, INITIAL_DATA)

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

immer

shallow copy

ramda lens