I can really recommend it for Win32 development.
Though I am unsure as to whether it complies with the latest C standards it is fairly current and, in my experience, produces code which is faster than Visual C 6 which I also use.
As I like writing really, really fast programs I use the "#pragma aux" directive which allows me to specify assembly functions which the compiler will then seamlessly embed inline without affecting the surrounding optimizations. It is vastly superior to the _asm construct (which is also available).
So why would anyone write anything in asssembly these days? For one thing x86 has block move and block set (movs/stos) instructions which execute faster than the standard memcpy/memset functions. In addition, as the code is inlined, wasteful call/prologue/epilogue/rets are avoided and the cache has less work to do. Another plus is wriiting 64-bit multiply/divide by 32-bit. The internal 64-bit counter may also be read in this manner and it is invaluable for determining execution times for code sequences.
Additionally the debugger is good, solid and easy to use.
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