Benchmark: Spread operator cost

Script Preparation code:

var book = { title: 'Jason is coming!', year: '1998' }

Tests:

Rendered benchmark preparation results:

Previous results

Test case name	Result
assign by spread
assign manually

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Firefox/102.0

Browser/OS: Firefox 102 on Mac OS X 10.15

Test name	Executions per second
assign by spread	12239480.0 Ops/sec
assign manually	859738400.0 Ops/sec

Spread operator cost (version: 0)