Benchmark: Copy vs traversal

Script Preparation code:

globalThis.obj1 = Array.from({ length: 100000 }).reduce((p, c) => ({ ...p, [c]: c }), {})
globalThis.obj2 = Array.from({ length: 100000 }).reduce((p, c) => ({ ...p, [c]: c }), {})

Tests:

Spread and single traverse
Object.values({ ...obj1, ...obj2 }).every(e => e === undefined)
No spread and double traverse
Object.values(obj1).every(e => e === undefined) Object.values(obj2).every(e => e === undefined)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread and single traverse
No spread and double traverse

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Chrome OS 14541.0.0

View result in a separate tab

Test name	Executions per second
Spread and single traverse	2628729.0 Ops/sec
No spread and double traverse	1851573.0 Ops/sec

Copy vs traversal (version: 0)

Comparing performance of: Spread and single traverse vs No spread and double traverse

Created: one year ago by: Guest

Jump to the latest result

Spread and single traverse

No spread and double traverse

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A