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authorRaymond Hettinger <python@rcn.com>2017-02-04 02:43:42 -0800
committerRaymond Hettinger <python@rcn.com>2017-02-04 02:43:42 -0800
commit5cd87a8d61246b0a6233bfb8503d4718b693cef0 (patch)
tree0f6eebc9a49de0acc82251dcc791d0ea9bcc98cf /Python/Python-ast.c
parentb451f91786a308c4a16f3fd66eae59e2528e3777 (diff)
downloadcpython-git-5cd87a8d61246b0a6233bfb8503d4718b693cef0.tar.gz
Reduce load factor (from 66% to 60%) to improve effectiveness of linear probing.
Decreased density gives better collision statistics (average of 2.5 probes in a full table versus 3.0 previously) and fewer occurences of starting a second possibly overlapping sequence of 10 linear probes. Makes resizes a little more frequent but each with less work (fewer insertions and fewer collisions).
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