[fpc-devel] static vs dynamic arrays

[Jonas Maebe]

On 4 apr 2006, at 13:12, Пётр Косаревский wrote:

> In real program registers should be used more efficiently,  
> especially when dealing with SEVERAL arrays, than for support of  
> ONE dynamical array.

We don't do anything special to use register not as efficiently as  
possible, and on the other hand making the register allocator more  
efficient is difficult (especially for a braindead architecture like  
x86).

> So, the circumstances described by you can only be reached in  
> special cases.

No, it's a very common cases on all cpus which have a reasonable  
amount of available registers.

> What can I do to speed up dynamical arrays?
>
> What can I do to speed up static arrays?

Unless you can implement static single assignment in the compiler,  
probably nothing.


Jonas