Run results for: iassign sequential vs nested calls

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Browser: Chrome 63

Operating system: Windows

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
// sequential calls	243435.1 Ops/sec
// nested calls	687498.9 Ops/sec

HTML Preparation code:

<script crossorigin src="https://unpkg.com/immutable-assign@2.0.4/deploy/iassign.js"></script>

Script Preparation code:

var state = {
    hasChanged: false,
    name: 'Default state',
    tags: [],
    nested: {
        hasChanged: false,
        name: 'Default nested state',
        tags: [],
        nested: {
            hasChanged: false,
            name: '',
            tags: []
        },
        map: new Map()
    },
    map: new Map()
};

Tests:

// sequential calls
const s7 = iassign(state, s => { s.hasChanged = true; return s; }); const s8 = iassign(s7, s => s.nested, nested => { nested.hasChanged = true; return nested; }); const s9 = iassign(s8, s => s.tags, tags => { tags.push('new tag'); return tags; });
// nested calls
const s10 = iassign(state, s => { s.hasChanged = true; s.nested = iassign(s.nested, nested => { nested.hasChanged = true; return nested; }); s.tags = iassign(s.tags, tags => { tags.push('new tag'); return tags; }); return s; });

Run results for: iassign sequential vs nested calls

// sequential calls

// nested calls