On Fri, 21 Jun 2013 06:14:38 -0400, Jonathan M Davis <jmdavisp...@gmx.com>
wrote:
On Friday, June 21, 2013 12:09:09 Gary Willoughby wrote:
Have you any tips for using D when you need fast string
concatenation? I regularly use code like this:
foreach (i, range)
{
foo ~= bar;
}
or:
foo = foo ~ bar ~ baz ~ qux;
I've used std.string.format(...) in some instances which sped
things up which surprised me.
Are there faster ways of appending strings?
In general, ~= will be faster, beacause it won't create temporaries like
concatenating a bunch of strings in a single expression would.
I believe the above is one call to the runtime.
To answer the OP, using reserve will speed up the allocation quite a bit.
Appender is certainly the fastest method.
-Steve
