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Re: Faster compilation speed


David Edelsohn <dje@watson.ibm.com> writes:

|> >>>>> Richard Henderson writes:
|> 
|> Richard> You havn't shown (or even provided guesstemates) how much temporal
|> Richard> or spacial locallity could be had by moving away from GC.  Exactly
|> Richard> how much garbage is created during compilation of a function, Dave?
|> 
|> Richard> Suppose we did do manual memory allocation and never created any
|> Richard> garbage whatsoever.  Suppose perfect temporal locality.  How much
|> Richard> spacial locality do we have, considering the pointer-chasing structure
|> Richard> of our IL?  My guess is not much.
|> 
|> 	Places where GCC could benefit from spacial locality is by
|> allocating the instruction list and pseudo registers from a large, static
|> virtual memory array instead of allocating individual objects dynamically.

Obstacks?

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
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