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Discussion on: 2 Ways to Merge Arrays in JavaScript

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samanthaming profile image
Samantha Ming Author

Interesting, thanks for writing out the test! Good to keep in mind if you need to optimize the code. But I wonder as spread become more popular, if the browser will start optimizing it ... maybe concat is faster because it’s been around longer and the browser is deciphering it πŸ€”

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agronick profile image
Kyle Agronick

I wondered that too. You would think it would just call concat internally. I'm not sure what would cause the huge difference.