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| author | Victor Stinner <victor.stinner@gmail.com> | 2012-05-29 10:57:52 (GMT) |
|---|---|---|
| committer | Victor Stinner <victor.stinner@gmail.com> | 2012-05-29 10:57:52 (GMT) |
| commit | d3f0882dfb3a15d604de1b1620b2bf8de9d643bb (patch) | |
| tree | 16c78bd58f57ffce487f71bb075372d72cfdcbde /Misc/NEWS | |
| parent | a1b0c9fc4d68cd4e1103456d0cedf2ef3bbbfe9a (diff) | |
| download | cpython-d3f0882dfb3a15d604de1b1620b2bf8de9d643bb.zip cpython-d3f0882dfb3a15d604de1b1620b2bf8de9d643bb.tar.gz cpython-d3f0882dfb3a15d604de1b1620b2bf8de9d643bb.tar.bz2 | |
Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
* Formatting string, int, float and complex use the _PyUnicodeWriter API. It
avoids a temporary buffer in most cases.
* Add _PyUnicodeWriter_WriteStr() to restore the PyAccu optimization: just
keep a reference to the string if the output is only composed of one string
* Disable overallocation when formatting the last argument of str%args and
str.format(args)
* Overallocation allocates at least 100 characters: add min_length attribute
to the _PyUnicodeWriter structure
* Add new private functions: _PyUnicode_FastCopyCharacters(),
_PyUnicode_FastFill() and _PyUnicode_FromASCII()
The speed up is around 20% in average.
Diffstat (limited to 'Misc/NEWS')
| -rw-r--r-- | Misc/NEWS | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -13,6 +13,9 @@ Core and Builtins - Issue #14835: Make plistlib output empty arrays & dicts like OS X. Patch by Sidney San MartÃn. +- Issue #14744: Use the new _PyUnicodeWriter internal API to speed up + str%args and str.format(args). + - Issue #14930: Make memoryview objects weakrefable. - Issue #14775: Fix a potential quadratic dict build-up due to the garbage |