On 04/05/14 07:03 PM, Brian Rogoff wrote: > Fair enough, but I hope that the Index trait overhaul is merged before > the ability to use slices like this is removed. To do otherwise would be > unpleasant.
The ability to grow ~[T] was already removed, and it would be really nice to remove the remaining users to improve performance by avoiding expensive conversions from Vec<T>. The original motivation behind Vec<T> was a performance one (it was just going to become the ~[T] implementation via a lang item) so it's quite sad that we've introduced a whole bunch of O(n) copies throughout the compiler to previously O(1) algorithms.
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