On 04/11/11 13:32, Kjell Rilbe wrote: > Den 2011-04-11 10:44 skrev Alex Peshkoff såhär: >> On 04/11/11 11:35, Kjell Rilbe wrote: >>> 2. If I'm not mistaken most languages support a "packed" directive that >>> tells the compiler to not align/pad the struct. Delphi does. But I doubt >>> it's possible to do the other way around: tell a compiler to pad/align >>> to N bytes. So, perhaps the most compatible way is to use packed structs >>> everywhere. >> That's impossible at least for RISC machines. > Impossible? Or just a lot of overhead to pack/unpack it each time the > data is to be passed across an external boundary? In that case we must talk not about structure - but about byteflow, where first value occupies N bytes, second - M, and so on. And yes, I'm sure that virtual function call can be done faster than unpacking of such stream.
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