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commit 1a3d809146c95cd138bad7bd42eb923af0a23493 Author: Justus Winter <[email protected]> Date: Thu May 8 16:43:11 2014 +0200 libihash: reduce the default maximum load factor to 75% The performance of hash tables depend critically on a low number of hash collisions. As the table fills up, the chance of collisions necessarily raises. Previously, libihash resized the hash table when the load exceeded 80%. This seems a bit optimistic (e. g. java.util.Hashtable uses 75% as default). * libihash/ihash.h (HURD_IHASH_MAX_LOAD_DEFAULT): Set to 75. --- libihash/ihash.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libihash/ihash.h b/libihash/ihash.h index 3ca5ec3..6bdc925 100644 --- a/libihash/ihash.h +++ b/libihash/ihash.h @@ -94,7 +94,7 @@ typedef struct hurd_ihash *hurd_ihash_t; /* Construction and destruction of hash tables. */ /* The default value for the maximum load factor in percent. */ -#define HURD_IHASH_MAX_LOAD_DEFAULT 80 +#define HURD_IHASH_MAX_LOAD_DEFAULT 75 /* The LOCP_OFFS to use if no location pointer is available. */ #define HURD_IHASH_NO_LOCP INTPTR_MIN -- Alioth's /usr/local/bin/git-commit-notice on /srv/git.debian.org/git/pkg-hurd/hurd.git
