Benchmark: Array push vs spread operator vs concat

Script Preparation code:
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Tests:
Push Data in Array
var myArr = new Array(10000); for(const i in data){ myArr.push(i); }
Data push via spread operator
var myArr = new Array(10000); for(const i in data){ myArr = [...myArr,i] }
concat data via spread operator
var myArr = new Array(10000); myArr = [...myArr,...data]
concat data via concat method
var myArr = new Array(10000); myArr = myArr.concat(data)
Rendered benchmark preparation results:
Suite status: <idle, ready to run>

Previous results
Test case name	Result
Push Data in Array
Data push via spread operator
concat data via spread operator
concat data via concat method
Fastest: N/A

Slowest: N/A

Latest run results:
Run details: (Test run date: 2 years ago)
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0
Browser/OS: Firefox 125 on Windows
View result in a separate tab
Test name	Executions per second
Push Data in Array	5788.2 Ops/sec
Data push via spread operator	17.6 Ops/sec
concat data via spread operator	19064.1 Ops/sec
concat data via concat method	16255.3 Ops/sec
Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.
Related benchmarks:
Array push vs spread operator vs concat (version: 1)

Compare push method with the new ES6 spread operator and native concat

Comparing performance of: Push Data in Array vs Data push via spread operator vs concat data via spread operator vs concat data via concat method

Created: 6 years ago by: Registered User

Jump to the latest result

Push Data in Array

Data push via spread operator

concat data via spread operator

concat data via concat method

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):
