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| author | Sergey Vojtovich <svoj@mariadb.org> | 2014-03-06 16:19:12 +0400 |
|---|---|---|
| committer | Sergey Vojtovich <svoj@mariadb.org> | 2014-03-06 16:19:12 +0400 |
| commit | b95c8ce530cbbd92b232324dc2c4376615bd1b5d (patch) | |
| tree | 60222ef1542c97949e24dcbc4474f5484b86119b /mysql-test/r/type_timestamp_hires.result | |
| parent | ae87e63184a451cd0c9cf95f11f51b78bb40fbc3 (diff) | |
| download | mariadb-git-b95c8ce530cbbd92b232324dc2c4376615bd1b5d.tar.gz | |
MDEV-5675 - Performance: my_hash_sort_bin is called too often
Reduced number of my_hash_sort_bin() calls from 4 to 1 per query.
Reduced number of memory accesses done by my_hash_sort_bin().
Details:
- let MDL subsystem use pre-calculated hash value for hash
inserts and deletes
- let table cache use pre-calculated MDL hash value
- MDL namespace is excluded from hash value calculation, so that
hash value can be used by table cache as is
- hash value for MDL is calculated as resulting hash value + MDL
namespace
- extended hash implementation to accept user defined hash function
Diffstat (limited to 'mysql-test/r/type_timestamp_hires.result')
0 files changed, 0 insertions, 0 deletions