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Re: Faster compilation speed
- From: Nick Ing-Simmons <nick dot ing-simmons at elixent dot com>
- To: geoffk at geoffk dot org
- Cc: gcc at gcc dot gnu dot org, Matt Austern <austern at apple dot com>
- Date: Tue, 13 Aug 2002 10:58:15 +0100
- Subject: Re: Faster compilation speed
- References: <FB532843-AE35-11D6-9F25-00039390D9E0@apple.com> <jmhehzadjb.fsf@desire.geoffk.org>
- Reply-to: Nick Ing-Simmons <nick dot ing-simmons at elixent dot com>
Geoff Keating <geoffk@geoffk.org> writes:
>
>We happen to know that GC as a whole is 10-13% of total compile time,
>even at -O0, and my expectation is that the RTL part of that is
>perhaps two-thirds, say 7%. So the benefit you can get is 7% less any
>overhead in tracking the reference counts and freeing
>briefly-allocated RTL.
That does not take into account the cache/tlb locality effects that
Linus explained are caused by delayed reclaimation.
--
Nick Ing-Simmons
http://www.ni-s.u-net.com/