On Wednesday, 5 April 2017 at 21:58:16 UTC, Inquie wrote:
I have a lot of string concatenation to do and I'm wondering if char[] is faster?
No, they are the same.
Does it simply extend the buffer or are new buffers created every time?
Both will extend the buffer when the runtime can guarantee it is allowed to, which it quite often can. Details here: http://dlang.org/d-array-article.html
I recommend just trying it with ~= (avoid a ~ b though, a ~= b is better when possible) and see how it performs before getting too worried about it, the built in really isn't bad.
