GCC 4.1: Buildable on GHz machines only?

[Marcin Dalecki]

On 2005-04-28, at 16:26, Lars Segerlund wrote:
>
>  I have never done any 'memory profiling' but I think it might be time 
> to give it a
>  shot, does anybody have any hints on how to go about something like 
> this ?

The main performance problem for GCC as I see it is structural. GCC is 
emulating
the concept of high polymorphism of data structures in plain C. Well 
actually it's
not even plain C any longer... GTY().

Using C++ with simple inheritance could help *a lot* here. (Duck...)

There is too much of pointer indirection in the data structures too.
Look throughout the code and wonder how very few iterations go around 
plan,
simple, fast, spare on register set, allowing cache prefetch, to work C 
arrays.
GCC is using linked lists to test the "efficiency" of TLB and other 
mechanisms
of the CPU.