OT (partially): about promotion of integers

[SomeDude]

On Thursday, 13 December 2012 at 21:28:52 UTC, SomeDude wrote:
> On Thursday, 13 December 2012 at 01:51:27 UTC, Timon Gehr wrote:
And
> if the standard library is twice as slow in implementation A 
> than in implemention B, then most programs will feel *at least* 
> twice as slow, and usually more, because if you call a function 
> f that's twice as slow in A than in B from another function 
> that's also twice as slow in A than in B, then the whole thing 
> is 4 times slower.

Hmmm, forget about this...