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Re: [PATCH] Reduce GC overhead of the C++ lexer buffer
Richard Guenther wrote:
> CP_LEXER_BUFFER_SIZE does not need to be power-of-two, but sizeof (struct
> cp_token) * CP_LEXER_BUFFER_SIZE should be close to (slightly below or
> equal) power-of-two, as this is the amount of memory GGC_NEWVEC will
> allocate. So, ((256 * 1024) / sizeof (struct cp_token)) * sizeof (struct
> cp_token) will be at most sizeof (struct cp_token) - 1 less than 256 *
> 1024 - and sizeof (struct cp_token) - 1 will be the new GC overhead here.
Thanks; I had missed that we were using GCC_NEWVEC here. I appreciate
your patience.
The patch is OK.
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Mark Mitchell
CodeSourcery
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