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Is gcc std::unordered_map implementation slow? If so - why?

... found the reason: it is a Problem of gcc-4.7!! With gcc-4.7 inserts: 37728 get : 2985 With gcc-4.6 inserts: 2531 get : 1565 So std::unordered_map in gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on d...
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Ruby Array find_first object?

... 203 Either I don't understand your question, or Enumerable#find is the thing you were looking for....
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WITH CHECK ADD CONSTRAINT followed by CHECK CONSTRAINT vs. ADD CONSTRAINT

I'm looking at the AdventureWorks sample database for SQL Server 2008, and I see in their creation scripts that they tend to use the following: ...
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How to know what the 'errno' means?

When calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ? 15 Answers ...
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An efficient way to transpose a file in Bash

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Expert R users, what's in your .Rprofile? [closed]

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How do I convert a String object into a Hash object?

...d rm -fr – Pithikos Apr 5 '16 at 14:23 add a comment  |  ...
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Determine if 2 lists have the same elements, regardless of order? [duplicate]

... answered Jan 15 '12 at 0:40 phihagphihag 239k6060 gold badges406406 silver badges444444 bronze badges ...
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arrayfun can be significantly slower than an explicit loop in matlab. Why?

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In a Bash script, how can I exit the entire script if a certain condition occurs?

... Michael FoukarakisMichael Foukarakis 34.2k55 gold badges7373 silver badges110110 bronze badges ...