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Why is printing to stdout so slow? Can it be sped up?

I've always been amazed/frustrated with how long it takes to simply output to the terminal with a print statement. After some recent painfully slow logging I decided to look into it and was quite surprised to find that almost all the time spent is waiting for the terminal to process the results. ...
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How can I obtain the element-wise logical NOT of a pandas Series?

I have a pandas Series object containing boolean values. How can I get a series containing the logical NOT of each value? ...
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?

I first noticed in 2009 that GCC (at least on my projects and on my machines) have the tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why. ...
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How can you automatically remove trailing whitespace in vim

I am getting 'trailing whitespace' errors trying to commit some files in git. 13 Answers ...
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How to use JavaScript regex over multiple lines?

I'd want the PRE block be picked up, even though it spans over newline characters. I thought the 'm' flag does it. Does not. ...
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Format a datetime into a string with milliseconds

I want to have a datetime string from the date with milliseconds. This code is typical for me and I'm eager to learn how to shorten it. ...
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How do I efficiently iterate over each entry in a Java Map?

If I have an object implementing the Map interface in Java and I wish to iterate over every pair contained within it, what is the most efficient way of going through the map? ...
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load scripts asynchronously

I am using several plugins, custom widgets and some other libraries from JQuery. as a result I have several .js and .css files. I need to create a loader for my site because it takes some time to load. it will be nice if I can display the loader before importing all the: ...
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Direct casting vs 'as' operator?

Consider the following code: 17 Answers 17 ...
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Finding local IP addresses using Python's stdlib

How can I find local IP addresses (i.e. 192.168.x.x or 10.0.x.x) in Python platform independently and using only the standard library? ...