I made the same test in C# using a 30MB plain ASCII text file.
Compared to fastest method proposed by Andrei, results are not
the best:
D:
readText.representation.count!(c => c == '\n') - 428 ms
byChunk(4096).joiner.count!(c => c == '\n') - 1160 ms
C#:
File.ReadAllLines.Length - 216 ms;
Win64, D 2.066.1, Optimizations were turned on in both cases.
The .net code is clearly not performance oriented
(http://referencesource.microsoft.com/#mscorlib/system/io/file.cs,675b2259e8706c26),
I suspect that .net runtime is performing some optimizations
under the hood.
Does the C# version validate the input? Using std.file.read
instead of readText.representation halves the runtime on my
machine.
