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330 commits

Author SHA1 Message Date
Raymond Hettinger
5cd87a8d61 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).
 2017-02-04 02:43:42 -08:00
Raymond Hettinger
e1af6964b4 Remove unnecessary variables. 
* so->used never gets changed during a resize
* so->filled only changes when dummies are present and being eliminated
 2017-02-02 08:24:48 -08:00
Serhiy Storchaka
5ab81d787f Issue #28959: Added private macro PyDict_GET_SIZE for retrieving the size of dict. 2016-12-16 16:18:57 +02:00
Serhiy Storchaka
85b0f5beb1 Added the const qualifier to char* variables that refer to readonly internal 
UTF-8 represenatation of Unicode objects.
 2016-11-20 10:16:47 +02:00
Serhiy Storchaka
06515833fe Replaced outdated macros _PyUnicode_AsString and _PyUnicode_AsStringAndSize 
with PyUnicode_AsUTF8 and PyUnicode_AsUTF8AndSize.
 2016-11-20 09:13:07 +02:00
Raymond Hettinger
4103e4dfbc Issue #28071: Add early-out for differencing from an empty set. 2016-09-11 22:02:28 -07:00
Raymond Hettinger
8421d714d0 Removed unused initialization and the uninteresting comment. 2016-04-29 01:37:05 -07:00
Serhiy Storchaka
fa070298e9 Issue #26880: Removed redundant checks in set.__init__. 2016-04-29 11:31:52 +03:00
Serhiy Storchaka
ab479c49d3 Issue #26494: Fixed crash on iterating exhausting iterators. 
Affected classes are generic sequence iterators, iterators of str, bytes,
bytearray, list, tuple, set, frozenset, dict, OrderedDict, corresponding
views and os.scandir() iterator.
 2016-03-30 20:41:15 +03:00
Serhiy Storchaka
fbb1c5ee06 Issue #26494: Fixed crash on iterating exhausting iterators. 
Affected classes are generic sequence iterators, iterators of str, bytes,
bytearray, list, tuple, set, frozenset, dict, OrderedDict, corresponding
views and os.scandir() iterator.
 2016-03-30 20:40:02 +03:00
Raymond Hettinger
3625af5f21 Moved misplaced functions to the section for C API functions. 2016-03-27 01:15:07 -07:00
Raymond Hettinger
2c257ab0f8 Responsibility for argument checking belongs in set.__init__() rather than set.__new__(). 
See dict.__new__() and list.__new__() for comparison.  Neither of those examine or touch
args or kwds.  That work is done in the __init__() methods.
 2016-03-26 04:10:11 -07:00
Raymond Hettinger
b72e21b9ab Speed-up construction of empty sets by approx 12-14%. 2016-03-25 02:29:59 -07:00
Raymond Hettinger
f50215412c Add early-out for the common case where kwds is NULL (gives 1.1% speedup). 2016-02-04 02:46:16 -08:00
Benjamin Peterson
3e47a1337c merge 3.5 2016-01-01 11:56:35 -06:00
Benjamin Peterson
4e3dd51396 merge 3.4 2016-01-01 11:56:16 -06:00
Benjamin Peterson
630329e4ea merge 3.3 2016-01-01 11:55:47 -06:00
Benjamin Peterson
0e617e22f0 remove some copyright notices supserseded by the toplevel ones 2016-01-01 11:53:47 -06:00
Serhiy Storchaka
a9406e77fa Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size. 
This allows sys.getsize() to work correctly with their subclasses with
__slots__ defined.
 2015-12-19 20:07:11 +02:00
Serhiy Storchaka
5c4064e8bd Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size. 
This allows sys.getsize() to work correctly with their subclasses with
__slots__ defined.
 2015-12-19 20:05:25 +02:00
Raymond Hettinger
e4495877dd Minor tweek. Counting down rather than up reduces register pressure. 2015-12-15 00:42:30 -08:00
Raymond Hettinger
86d322f020 Undo inadvertent line swap 2015-12-13 19:27:17 -08:00
Raymond Hettinger
5088f6005f Hoist constant expressions (so->table and so->mask) out of the inner-loop. 2015-12-13 18:45:01 -08:00
Raymond Hettinger
66f6238fca Add assertion to verify the pre-condition in the comments. 2015-11-17 20:58:43 -08:00
Raymond Hettinger
6019c8ced0 Issue #25629: Move set fill/used updates out of inner loop 2015-11-17 08:28:07 -08:00
Raymond Hettinger
4148195c45 Move the active entry multiplication to later in the hash calculation 2015-08-07 00:43:39 -07:00
Raymond Hettinger
b501a27ad8 Restore frozenset hash caching removed in cf707dd190a9 2015-08-06 22:15:22 -07:00
Raymond Hettinger
a286a51ae1 Fix comment typo 2015-08-01 11:07:11 -07:00
Raymond Hettinger
36c0500990 Tweak the comments 2015-08-01 10:57:42 -07:00
Raymond Hettinger
fbffdef47d Issue #24762: Speed-up frozenset_hash() and greatly beef-up the comments. 2015-08-01 09:53:00 -07:00
Raymond Hettinger
daffc916aa Issue #24681: Move the most likely test first in set_add_entry(). 2015-07-31 07:58:56 -07:00
Raymond Hettinger
70559b5c20 Issue #24681: Move the store of so->table to the code block where it is used. 2015-07-23 07:42:23 -04:00
Raymond Hettinger
ff9e18a863 Issue #24583: Consolidate previous set object updates into a single function 
with a single entry point, named exit points at the bottom, more self-evident
refcount adjustments, and a comment describing why the pre-increment was
necessary at all.
 2015-07-20 07:34:05 -04:00
Raymond Hettinger
482c05cbb5 Issue #24583: Fix refcount leak. 2015-07-20 01:23:32 -04:00
Raymond Hettinger
061091a7c5 Issue #24583: Fix crash when set is mutated while being updated. 2015-07-15 23:54:02 -07:00
Raymond Hettinger
d702044bcd merge 2015-07-15 23:52:29 -07:00
Raymond Hettinger
a3626bc5bd Issue #24583: Fix crash when set is mutated while being updated. 2015-07-15 23:50:14 -07:00
Raymond Hettinger
5d2385ff6f Neaten-up a little bit. 2015-07-08 11:52:27 -07:00
Raymond Hettinger
9632a7d735 Issue 24581: Revert c9782a9ac031 pending a stronger test for mutation during iteration. 2015-07-07 15:29:24 -07:00
Raymond Hettinger
11ce8e6c37 Minor bit of factoring-out common code. 2015-07-06 19:08:49 -07:00
Raymond Hettinger
3dbc11cadd Tighten-up code in the set iterator to use an entry pointer rather than indexing. 2015-07-06 19:03:01 -07:00
Raymond Hettinger
ef6bd7d963 Tighten-up code in set_next() to use an entry pointer rather than indexing. 2015-07-06 08:43:37 -07:00
Raymond Hettinger
b48d6a63ff Bring related functions add/contains/discard together in the code. 2015-07-05 16:27:44 -07:00
Raymond Hettinger
73799b181e Change add/contains/discard calls to pass the key and hash instead of an entry struct. 2015-07-05 16:06:10 -07:00
Raymond Hettinger
dc28d5a198 Clean-up call patterns for add/contains/discard to better match the caller's needs. 2015-07-05 10:03:20 -07:00
Raymond Hettinger
ac2ef65c32 Make the unicode equality test an external function rather than in-lining it. 
The real benefit of the unicode specialized function comes from
bypassing the overhead of PyObject_RichCompareBool() and not
from being in-lined (especially since there was almost no shared
data between the caller and callee).  Also, the in-lining was
having a negative effect on code generation for the callee.
 2015-07-04 16:04:44 -07:00
Raymond Hettinger
e186c7674c Make sure the dummy percentage calculation won't overflow. 2015-07-04 11:28:35 -07:00
Raymond Hettinger
c2480dc0c4 Minor cleanup. 2015-07-04 08:46:31 -07:00
Raymond Hettinger
b322326f48 Minor nit: Make the style of checking error return values more consistent. 2015-07-03 23:37:16 -07:00
Raymond Hettinger
4897300276 Minor factoring: move redundant resize scaling logic into the resize function. 2015-07-03 20:00:03 -07:00