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229 commits

Author SHA1 Message Date
Raymond Hettinger
4897300276 Minor factoring: move redundant resize scaling logic into the resize function. 2015-07-03 20:00:03 -07:00
Raymond Hettinger
3c1f52e829 Call set_lookkey() directly to avoid unnecessary memory spills and reloads. 2015-07-03 18:31:09 -07:00
Raymond Hettinger
15f0869609 Move insertion resize logic into set_insert_key(). 
Simplifies the code a little bit and does the resize check
only when a new key is added (giving a small speed up in
the case where the key already exists).

Fixes possible bug in set_merge() where the set_insert_key()
call relies on a big resize at the start to make enough room
for the keys but is vulnerable to a comparision callback that
could cause the table to shrink in the middle of the merge.

Also, changed the resize threshold from two-thirds of the
mask+1 to just two-thirds.  The plus one offset gave no
real benefit (afterall, the two-thirds mark is just a
heuristic and isn't a precise cut-off).
 2015-07-03 17:21:17 -07:00
Raymond Hettinger
2eff9e9441 Minor refactoring. Move reference count logic into function that adds entry. 2015-06-27 22:03:35 -07:00
Raymond Hettinger
91672617d5 Minor tweeak to tighten the inner-loop. 2015-06-26 02:50:21 -07:00
Raymond Hettinger
38bb95e49d Minor code cleanup. 2015-06-24 01:22:19 -07:00
Raymond Hettinger
7e3592dca6 Harmonize the bottom of the outer loop with its entry point 
giving a small simplification.  Timings show that hash
pre-check seems only benefit the inner-loop (the linear probes).
 2015-06-21 10:47:20 -07:00
Raymond Hettinger
6ee588f14e Restore quick exit (no freeslot check) for common case (found null on first probe). 2015-06-20 21:39:51 -07:00
Serhiy Storchaka
e90982111a Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), 
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
 2015-05-30 17:48:54 +03:00
Serhiy Storchaka
ac5569b1fa Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), 
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
 2015-05-30 17:48:19 +03:00
Serhiy Storchaka
fa494fd883 Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(), 
PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()
to check for and handle errors correctly.
 2015-05-30 17:45:22 +03:00
Raymond Hettinger
8651a50475 Issue #23359: Specialize set_lookkey intoa lookup function and an insert function. 2015-05-27 10:37:20 -07:00
Raymond Hettinger
5af9e13c18 Minor stylistic and consistency cleanup. 2015-05-13 01:44:36 -07:00
Raymond Hettinger
1bd8d75be3 Issue #23290: Optimize set_merge() for cases where the target is empty. 
(Contributed by Serhiy Storchaka.)
 2015-05-13 01:26:14 -07:00
Raymond Hettinger
438f9134cf Mirco-optimizations to reduce register spills and reloads observed on CLANG and GCC. 2015-02-09 06:48:29 -06:00
Raymond Hettinger
8249282622 Minor code clean up. 2015-02-04 08:37:02 -08:00
Raymond Hettinger
06bb1226d1 Issue 23359: Reduce size of code in set_lookkey. Only do linear probes when there is no wrap-around. 
Nice simplification contributed by Serhiy Storchaka :-)
 2015-02-03 08:15:30 -08:00
Raymond Hettinger
c658d85487 Issue 23359: Tighten inner search loop for sets (don't and-mask every entry lookup). 2015-02-02 08:35:00 -08:00
Raymond Hettinger
59ecabd12a Keep the definition of i consistent between set_lookkey() and set_insert_clean(). 2015-01-31 02:45:12 -08:00
Raymond Hettinger
9edd753229 Minor tweak to improve code clarity. 2015-01-30 20:09:23 -08:00
Raymond Hettinger
06a1c8dfa0 Fix typo in a comment. 2015-01-30 18:02:15 -08:00
Raymond Hettinger
f8d1a31e70 Revert unintended part of the commit (the key==dummy test wasn't supposed to change). 2015-01-26 22:06:43 -08:00
Raymond Hettinger
a5ebbf6295 Remove unneeded dummy test from the set search loop (when the hashes match we know the key is not a dummy). 2015-01-26 21:54:35 -08:00
Raymond Hettinger
3037e84ad1 Issue #23269: Tighten search_loop in set_insert_clean() 
Instead of masking and shifting every loopup, move the wrap-around
test outside of the inner-loop.
 2015-01-26 21:33:48 -08:00
Raymond Hettinger
b335dfe7fa Set the hash values of dummy entries to -1. Improves quality of entry->hash == hash tests. 2015-01-25 16:38:52 -08:00
Raymond Hettinger
4d45c1069b Update out-of-date comments. 2015-01-25 16:27:40 -08:00
Raymond Hettinger
93035c44fd Issue #23119: Simplify setobject by inlining the special case for unicode equality testing. 2015-01-25 16:12:49 -08:00
Raymond Hettinger
ed741d4ff0 A hybrid of and-masking and a conditional-set-to-zero produce even faster search loop. 2015-01-18 21:25:15 -08:00
Raymond Hettinger
bd9b200b87 Update copyright for 2015 updates. 2015-01-18 16:10:30 -08:00
Raymond Hettinger
9cd6a789c6 Clean-up, simplify, and slightly speed-up bounds logic in set_pop(). 
Elsewhere in the setobject.c code we do a bitwise-and with the mask
instead of using a conditional to reset to zero on wrap-around.
Using that same technique here use gives cleaner, faster, and more
consistent code.
 2015-01-18 16:06:18 -08:00
Raymond Hettinger
1202a4733e Issue 23261: Clean-up the hack to store the set.pop() search finger in a hash field instead of the setobject. 2015-01-18 13:12:42 -08:00
Raymond Hettinger
8edf27c134 Small clean-up. Factor-out common code for add, contains, and discard function pairs. 2014-12-26 23:08:58 -08:00
Raymond Hettinger
08e3dc0ad6 Issue #23107: Tighten-up loops in setobject.c 
* Move the test for an exact key match to after a hash match
* Use "used" as a loop counter instead of "fill"
* Minor improvements to variable names and code consistency
 2014-12-26 20:14:00 -08:00
Victor Stinner
12174a5dca Issue #22156: Fix "comparison between signed and unsigned integers" compiler 
warnings in the Objects/ subdirectory.

PyType_FromSpecWithBases() and PyType_FromSpec() now reject explicitly negative
slot identifiers.
 2014-08-15 23:17:38 +02:00
Raymond Hettinger
426d9958a2 Add development comments to setobject.c 2014-05-18 21:40:20 +01:00
Eric V. Smith
6ba5665fc7 Fix typo in comment. 2014-01-14 08:15:03 -05:00
Raymond Hettinger
74fc8c47f6 Add comments to frozenset_hash(). 
Also, provide a minor hint to the compiler on how to group the xors.
 2014-01-05 12:00:31 -08:00
Raymond Hettinger
e259f13874 Minor code clean-up. Keep the C-API all in one section. 2013-12-15 11:56:14 -08:00
Raymond Hettinger
710a67edfc Note that LINEAR_PROBES can be set to zero. 2013-09-21 20:17:31 -07:00
Raymond Hettinger
4ef0528b97 Minor beautification. Put updates and declarations in a more logical order. 2013-09-21 15:39:49 -07:00
Raymond Hettinger
0ce1953bf7 When LINEAR_PROBES=0, let the compiler remove the dead code on its own. 2013-09-21 14:07:18 -07:00
Raymond Hettinger
c70a2b7bb9 Make the linear probe sequence clearer. 2013-09-21 14:02:55 -07:00
Raymond Hettinger
8408dc581e Issue 18771: Make it possible to set the number linear probes at compile-time. 2013-09-15 14:57:15 -07:00
Raymond Hettinger
742d8716ff Put the defines in the logical section and fix indentation. 2013-09-08 00:25:57 -07:00
Raymond Hettinger
583cd03fd1 Minor code beautification. 2013-09-07 22:06:35 -07:00
Raymond Hettinger
4ea9080da9 Improve code clarity by removing two unattractive macros. 2013-09-07 21:01:29 -07:00
Raymond Hettinger
8f8839e10a Remove the freelist scheme for setobjects. 
The setobject freelist was consuming memory but not providing much value.
Even when a freelisted setobject was available, most of the setobject
fields still needed to be initialized and the small table still required
a memset().  This meant that the custom freelisting scheme for sets was
providing almost no incremental benefit over the default Python freelist
scheme used by _PyObject_Malloc() in Objects/obmalloc.c.
 2013-09-07 20:26:50 -07:00
Raymond Hettinger
04fd9dd52b Small rearrangement to bring together the three functions for probing the hash table. 2013-09-07 17:41:01 -07:00
Raymond Hettinger
ae7b00e2d3 Move the overview comment to the top of the file. 2013-09-07 15:05:00 -07:00
Raymond Hettinger
c56e0e3980 Minor touchups. 2013-09-02 16:32:27 -07:00