Re: Wondering about FACE_CACHE_BUCKETS_SIZE

[Eli Zaretskii <eliz@gnu.org>]

> From: Win Treese <treese@acm.org>
> Date: Tue, 9 Feb 2021 21:53:34 -0500
> 
> 
> I happened to be looking at some code in src/xfaces.c on the trunk, and I
> noticed this at lines 289-292:
> 
> /* Size of hash table of realized faces in face caches (should be a
>    prime number).  */
> 
> #define FACE_CACHE_BUCKETS_SIZE 1001
> 
> 1001 isn’t prime (it’s 7*11*13). A quick look at the hash table code
> suggest that the main effect of it is to slow things down a little bit
> because some hash buckets would get used more often than they
> would be with a prime. 
> 
> From the git log, it’s been this way since the code was first committed
> in 1999.
> 
> There’s probably no real problem here, except that the comment and
> code don’t match. On the other hand, 997 and 1009 are nice nearby
> primes if it really matters.

Thanks, I changed that to 1009.