On Mon, 19 Mar 2012 08:56:28 +0100, Dmitry Olshansky
<[email protected]> wrote:
There doesn't appear to be any significant overhead to reading dchar vs
char. I haven't looked at the code (or decode) underneath. I presume it
is decoding and expanding into dchar...
// read dchar lc by chunk ...same
//finished! time: 34 ms
void wcp_dchar(string fn)
{
ulong l_cnt;
auto f = File(fn);
foreach(chunk; f.byChunk(1_000_000)){
foreach(dchar c;chunk){
if (c=='\n')
l_cnt++;
}
}
}
That was strange - decoding takes time, that surely trips few msesc in
favor of non-decoding version. Probably I/o is hiding the facts here.
1.5x-3x and we haven't even ported back the faster phobos
std.utf.decode to druntime which is called by foreach.
