Dave Cheney • 3/1/2020

Are large slices more expensive than smaller ones?

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This article clarifies a common misconception in Go programming: assigning a large slice is not more expensive than assigning a small one. It explains that all slices in Go are the same size (three machine words), containing a pointer, length, and capacity. Therefore, copying a slice variable only copies these three words, regardless of the underlying array's size.

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#performance #memory management #go
Are large slices more expensive than smaller ones?

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