[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2018-10-13 Thread Pablo Galindo Salgado 


Change by Pablo Galindo Salgado :


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pull_requests: +9223

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread Yury Selivanov 

Yury Selivanov added the comment:

I think this is a duplicate of http://bugs.python.org/issue26280...

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread STINNER Victor 

STINNER Victor added the comment:

> I think this is a duplicate of http://bugs.python.org/issue26280...

Oh, I missed this one. I didn't understand "[]" in the title. I didn't 
understand the purpose of optimizing BUILD_LIST :-D

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resolution:  -> duplicate
status: open -> closed
superseder:  -> ceval: Optimize list[int] (subscript) operation similarly to 
CPython 2.7

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread STINNER Victor 

New submission from STINNER Victor:

Copy of msg222985 by Raymond Hettinger from issue #21955:

"There also used to be a fast path for binary subscriptions with integer 
indexes.  I would like to see that performance regression fixed if it can be 
done cleanly."

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messages: 259708
nosy: haypo, rhettinger, yselivanov
priority: normal
severity: normal
status: open
title: ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR
type: performance
versions: Python 3.6

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread STINNER Victor 

STINNER Victor added the comment:

(Oops, I attached the wrong patch, fixed in patch v2.)

Quick & dirty micro-benchmark:

Original:

$ ./python -m timeit -s 'lst=list("hello")' 'lst[2]'
1000 loops, best of 3: 0.0261 usec per loop

Patched:

$ ./python -m timeit -s 'lst=list("hello")' 'lst[2]'
1000 loops, best of 3: 0.0186 usec per loop

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Added file: http://bugs.python.org/file41834/binary_subscr-2.patch

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread STINNER Victor 

Changes by STINNER Victor :


Removed file: http://bugs.python.org/file41833/binary_subscr.patch

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[issue26301] ceval.c: reintroduce fast-path for list[index] in BINARY_SUBSCR

2016-02-05 Thread STINNER Victor 

Changes by STINNER Victor :


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keywords: +patch
Added file: http://bugs.python.org/file41833/binary_subscr.patch

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