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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -84,3 +84,9 @@ with all sufficient information, see the ChangeLog file. * struct RBignum is hidden. [Feature #6083] Use rb_integer_pack and rb_integer_unpack instead. + +* st hash table uses power-of-two sizes for speed [Feature #9425]. + Lookups are 10-25% faster if using appropriate hash functions. + However, weaknesses in hash distribution can no longer be masked + by prime number-sized tables, so extensions may need to tweak + hash functions to ensure good distribution. |