On 7/24/07, Richard Guenther <[EMAIL PROTECTED]> wrote:
For performance small arrays should be the same as individual members (I can see the annoying fact that initialization is a headache - this has annoyed me as well). For larger arrays (>4 members), aliasing will make a difference possibly, making the array variant slower. Any union variant is expected to be slower for aliasing reasons (we do not do field-sensitive aliasing for unions).
Confirmed :) And thanks for the clue about the threshold.
In the end I would still recommend to go with array variants.
I guess wishful thinking, or heresy, got me asking for a sanctioned address-this-as-an-array idiom.; now i'll go with the flow and use those 2nd class citizens of C++ aka array, even if i'm a bit sceptical about the performance equivalence (granted it isn't as obvious as it used to be, i need to investigate some more). But for sure it can't be as terrible as unions...
