Run results for: Immer vs Spread Reduce9

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:82.0) Gecko/20100101 Firefox/82.0

Browser: Firefox 82

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
immer	2855.9 Ops/sec
Mutate	885899.3 Ops/sec
Spread	41242.0 Ops/sec
immer pull up	29415.0 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/immer@3.1.3/dist/immer.umd.min.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

data = _.range(100)

Tests:

immer
const reducer = immer.produce((draft, curr) => { draft[0] = 0; }); const answer = data.reduce(reducer, {})
Mutate
const reducer = (draft, curr) => { draft[0] = 0; return draft; }; const answer = data.reduce(reducer, {})
Spread
const answer = data.reduce((acc, curr) => ({ ...acc, 0: 0, }), {});
immer pull up
const answer = immer.produce({}, draft => { data.reduce((acc, curr) => { acc[0] = 0; return acc }, draft) });

Run results for: Immer vs Spread Reduce9

immer

Mutate

Spread

immer pull up