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wesm opened this issue Jul 11, 2013 · 2 comments
Closed

.ix performance regression? #4198

wesm opened this issue Jul 11, 2013 · 2 comments
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Performance Memory or execution speed performance
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@wesm
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wesm commented Jul 11, 2013

is this kind of use cases reflected in our vbenchmarks? suppose @jreback is the one to ask here. more evidence need to rewrite the internals of pandas objects in C to reduce indexing overhead, among other things

http://stackoverflow.com/questions/17538902/is-there-a-way-to-speed-up-this-pandas-function

@jreback
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jreback commented Jul 11, 2013

Current timings / I added to vbench

frame_get_value                              |   0.0017 |
frame_get_value_ix                           |   0.0033 |

OP should be using .get_value/.at or using a vectorized solution in any event

UPDATE:

these are the same on 0.10.1 and 0.12rc1

no regression on any of the indexing routings (to current master)

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jreback commented Jul 12, 2013

benchmark added: 7b2eaa4

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