svn+ssh://pythondev@svn.python.org/python/trunk
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r73614 | benjamin.peterson | 2009-06-28 11:08:02 -0500 (Sun, 28 Jun 2009) | 1 line
add two generic macros for peeking and setting in the stack
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r73615 | benjamin.peterson | 2009-06-28 11:14:07 -0500 (Sun, 28 Jun 2009) | 1 line
use stack macros
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svn+ssh://pythondev@svn.python.org/python/trunk
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r72912 | benjamin.peterson | 2009-05-25 08:13:44 -0500 (Mon, 25 May 2009) | 5 lines
add a SETUP_WITH opcode
It speeds up the with statement and correctly looks up the special
methods involved.
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r72920 | benjamin.peterson | 2009-05-25 15:12:57 -0500 (Mon, 25 May 2009) | 1 line
take into account the fact that SETUP_WITH pushes a finally block
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r72940 | benjamin.peterson | 2009-05-26 07:49:59 -0500 (Tue, 26 May 2009) | 1 line
teach the peepholer about SETUP_WITH
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svn+ssh://pythondev@svn.python.org/python/trunk
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r73064 | antoine.pitrou | 2009-05-30 23:27:00 +0200 (sam., 30 mai 2009) | 4 lines
Issue #5330: C functions called with keyword arguments were not reported by
the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
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svn+ssh://pythondev@svn.python.org/python/trunk
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r69811 | collin.winter | 2009-02-20 13:30:41 -0600 (Fri, 20 Feb 2009) | 2 lines
Issue 5176: special-case string formatting in BINARY_MODULO implementation. This shows a modest (1-3%) speed-up in templating systems, for example.
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r69947 | jeffrey.yasskin | 2009-02-24 16:48:34 -0600 (Tue, 24 Feb 2009) | 3 lines
Tools/scripts/analyze_dxp.py, a module with some helper functions to
analyze the output of sys.getdxp().
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This patch by Antoine Pitrou optimizes the bytecode for conditional branches by
merging the following "POP_TOP" instruction into the conditional jump. For
example, the list comprehension "[x for x in l if not x]" produced the
following bytecode:
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 23 (to 32)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 JUMP_IF_TRUE 10 (to 28)
18 POP_TOP
19 LOAD_FAST 1 (x)
22 LIST_APPEND 2
25 JUMP_ABSOLUTE 6
>> 28 POP_TOP
29 JUMP_ABSOLUTE 6
>> 32 RETURN_VALUE
but after the patch it produces the following bytecode:
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 18 (to 27)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 POP_JUMP_IF_TRUE 6
18 LOAD_FAST 1 (x)
21 LIST_APPEND 2
24 JUMP_ABSOLUTE 6
>> 27 RETURN_VALUE
Notice that not only the code is shorter, but the conditional jump
(POP_JUMP_IF_TRUE) jumps right to the start of the loop instead of going through
the JUMP_ABSOLUTE at the end. "continue" statements are helped
similarly.
Furthermore, the old jump opcodes (JUMP_IF_FALSE, JUMP_IF_TRUE) have been
replaced by two new opcodes:
- JUMP_IF_TRUE_OR_POP, which jumps if true and pops otherwise
- JUMP_IF_FALSE_OR_POP, which jumps if false and pops otherwise
on compilers that support it (notably: gcc, SunPro, icc), the bytecode
evaluation loop is compiled with a new dispatch mechanism which gives
speedups of up to 20%, depending on the system, on various benchmarks.
svn+ssh://pythondev@svn.python.org/python/trunk
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r67666 | jeffrey.yasskin | 2008-12-08 10:55:24 -0800 (Mon, 08 Dec 2008) | 3 lines
Issue 4597: Fix several cases in EvalFrameEx where an exception could be
"raised" without setting x, err, or why to let the eval loop know.
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r67685 | jeffrey.yasskin | 2008-12-09 23:35:02 -0800 (Tue, 09 Dec 2008) | 2 lines
Update Misc/NEWS for r67666.
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r67688 | amaury.forgeotdarc | 2008-12-11 00:22:49 +0100 (jeu., 11 déc. 2008) | 6 lines
#4559: When a context manager's __exit__() method returns an object whose
conversion to bool raises an exception, 'with' loses that exception.
Reviewed by Jeffrey Yasskin.
Already ported to 2.5, will port to 2.6 and 3.0
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svn+ssh://pythondev@svn.python.org/python/trunk
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r67494 | jeffrey.yasskin | 2008-12-02 22:46:45 -0800 (Tue, 02 Dec 2008) | 5 lines
Speed up Python (according to pybench and 2to3-on-itself) by 1-2% by caching
whether any thread has tracing turned on, which saves one load instruction in
the fast_next_opcode path in PyEval_EvalFrameEx(). See issue 4477.
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could be easily encountered under Windows in debug mode when exercising
the recursion limit checking code, due to bogus handling of recursion
limit when USE_STACKCHEK was enabled.
Reviewed by Amaury Forgeot d'Arc on IRC.
an 'except' clause), the exception __context__ would be reset to None.
This crases the interpreter if this precisely happens inside PyErr_SetObject.
- now the __context__ is properly preserved
- in any case, PyErr_SetObject now saves the current exc_value in a local variable, to
avoid such crashes in the future.
Reviewer: Antoine Pitrou.
PyUnicode_AsStringAndSize -> _PyUnicode_AsStringAndSize to mark
them for interpreter internal use only.
We'll have to rework these APIs or create new ones for the
purpose of accessing the UTF-8 representation of Unicode objects
for 3.1.
