Re: Alternative C compilers on x86_64 Linux?

On 30/09/2016 04:03, Hans-Peter Diettrich wrote:
> BartC schrieb:
>
>> (I can tokenise C source code at some 10M lines per second on my PC ...
>
> IMO it's not the header files, which slow down compilation, but the
> preprocessor macros which require to look up and optionally expand every
> token. ...


> In so far I don't think that it's fair or
> meaningful to compare a full blown compiler with a bare tokenizer.


I seem to remember some comment in this group that tokenising accounts
for a big chunk of a compiler's runtime (50% or something).


While it is true that doing a full compile will take longer than just
raw tokenising, should that factor be of the order of 1000 times longer,
or three magnitudes?


I was investigating whether a reasonable working compiler could be
developed working at between 1 and 2 magnitudes slow-down from the raw
tokenising speed.


Probably one magnitude is a little optimistic, for C source anyway (with
preprocessing and stuff also needed), but two magnitudes is easily on
the cards. I think Tiny C is within that range.


--
Bartc

Return to the comp.compilers page.
Search the comp.compilers archives again.