Golang extend slice capacity


Slices. An array has a fixed size. A slice, on the other hand, is a dynamically-sized, flexible view into the elements of an array. In practice, slices are much more common than arrays. The type []T is a slice with elements of type T. A slice is formed by specifying two indices, a low and high bound, separated by a colon: a[low : high] Jul 31, 2019 · The array underlying a slice may extend past the end of the slice. The capacity is a measure of that extent: it is the sum of the length of the slice and the length of the array beyond the slice; a slice of length up to that capacity can be created by slicing a new one from the original slice. Aug 26, 2013 · Within the first 1k of elements, capacity is doubled. Then capacity is being grown by a factor of 1.25 or 25%. This means that using a slice in this way will yield the performance we need for most situations and memory won’t be an issue. Originally I thought that a new slice value would be created for each call to append but this isn’t the ...