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| author | Raymond Hettinger <python@rcn.com> | 2004-03-07 07:31:06 (GMT) |
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| committer | Raymond Hettinger <python@rcn.com> | 2004-03-07 07:31:06 (GMT) |
| commit | dd80f762650f42f5f9ae820d9f55b21ed6f33bc0 (patch) | |
| tree | f7e7e6545b9896601dd13a1c07e409fef88ede2b /Doc | |
| parent | bff63f034366b0cf0442e9db5e5674751beca25a (diff) | |
| download | cpython-dd80f762650f42f5f9ae820d9f55b21ed6f33bc0.zip cpython-dd80f762650f42f5f9ae820d9f55b21ed6f33bc0.tar.gz cpython-dd80f762650f42f5f9ae820d9f55b21ed6f33bc0.tar.bz2 | |
SF patch #910929: Optimize list comprehensions
Add a new opcode, LIST_APPEND, and apply it to the code generation for
list comprehensions. Reduces the per-loop overhead by about a third.
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/whatsnew24.tex | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/whatsnew/whatsnew24.tex b/Doc/whatsnew/whatsnew24.tex index 24650fa..2a323ff 100644 --- a/Doc/whatsnew/whatsnew24.tex +++ b/Doc/whatsnew/whatsnew24.tex @@ -288,6 +288,10 @@ yellow 5 use as arguments to functionals: \samp{map(mydict.__getitem__, keylist)}. +\item Added an newcode opcode, \code{LIST_APPEND}, that simplifies + the generated bytecode for list comprehensions and speeds them up + by about a third. + \end{itemize} The net result of the 2.4 optimizations is that Python 2.4 runs the |