It takes a bit of work to get around the mutable buffers problem in D language arrays. I found it made a performance difference in xml parsing.


https://github.com/betrixed/dlang-xml/blob/master/xml/util/buffer.d

/**
	Buffer(T) - Versatile appendable D array for buffer reuse,
append, reset with preserved capacity.
	Has additional template specializations for char, wchar, dchar,
which always has an extra space for appending a terminating null
character.
	Magic property is no memory reallocation or capacity loss if
length set to zero.
	Resulting speed ups from reduced memory manager work. Perhaps
reduction in hardware cache misses.
	Almost a drop in replacement for T[]. Some features adopted from
std.array and std.range
*/


-- 
Technosphere-brain-shrink - trying to give it up

On Wednesday, 28 December 2016 at 12:30:33 UTC, Michael Rynn wrote:
>
> It takes a bit of work to get around the mutable buffers problem in D language arrays. I found it made a performance difference in xml parsing.
>
>
> https://github.com/betrixed/dlang-xml/blob/master/xml/util/buffer.d
>
> /**
> 	Buffer(T) - Versatile appendable D array for buffer reuse,
> append, reset with preserved capacity.
> 	Has additional template specializations for char, wchar, dchar,
> which always has an extra space for appending a terminating null
> character.
> 	Magic property is no memory reallocation or capacity loss if
> length set to zero.
> 	Resulting speed ups from reduced memory manager work. Perhaps
> reduction in hardware cache misses.
> 	Almost a drop in replacement for T[]. Some features adopted from
> std.array and std.range
> */

See also: https://github.com/sociomantic-tsunami/ocean/blob/v2.x.x/src/ocean/core/Buffer.d