Run results for: Immer vs Spread Reduce9

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
immer	14243.6 Ops/sec
Mutate	2209281.0 Ops/sec
Spread	124043.8 Ops/sec
immer pull up	80000.8 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