[Issue 14256] Poor IO performance on 64-bit dmd 2.066 (OS X)

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14256

--- Comment #12 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
Can you please test with -m32mscoff, in addition to -m32 and -m64?

I predict that the numbers are going to be very close to -m64. If so, then that
indicates that we are limited by Microsoft's C runtime, in which case there is
nothing that can be done short of rewriting std.stdio to not use C I/O.

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