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updated internals docs: hash table max. load factor is 0.75 now

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Thomas Waldmann 2015-12-13 19:58:32 +01:00
parent 2ecfa54aee
commit 393e36b6da
1 changed files with 3 additions and 3 deletions
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docs/internals.rst
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@ -276,10 +276,10 @@ buckets. As a consequence the hash is just a start position for a linear
search, and if the element is not in the table the index is linearly crossed search, and if the element is not in the table the index is linearly crossed
until an empty bucket is found. until an empty bucket is found.
When the hash table is almost full at 90%, its size is doubled. When it's When the hash table is filled to 75%, its size is doubled. When it's
almost empty at 25%, its size is halved. So operations on it have a variable emptied to 25%, its size is halved. So operations on it have a variable
complexity between constant and linear with low factor, and memory overhead complexity between constant and linear with low factor, and memory overhead
varies between 10% and 300%. varies between 33% and 300%.
Indexes / Caches memory usage Indexes / Caches memory usage