Convert more non-GTY htab_t to hash_table.

[Diego Novillo]

On Fri, Oct 5, 2012 at 6:08 PM, Lawrence Crowl <crowl@googlers.com> wrote:

>> For many people the time to compile (almost) empty file is very
>> important, we are already bad about that right now, initializing
>> too much stuff dynamically is going to make it worse.
>
> So far, we are looking at dynamic initializations that would
> take about 10 cycles.  Even on a slow processor, a thousand
> initializations would take a microsecond.  Our time reports don't
> even report anything less than 5 milliseconds.
>
> Is there any reason to believe that this anticipated static
> initialization overhead is not pretty low relative to other overhead?
> I'm thinking here of the fact that to even start, the driver launches
> cc1[plus] which has to parse all the options created by the driver.

I agree.  I don't think this will be a real problem.  If timings show
otherwise, we can always change or improve the compiler.


Diego.