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How does one write code that best utilizes the CPU cache to improve performance?
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The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Techniques for ...
How to immediately see compile errors in project tree of IntelliJ Idea?
...ile errors on the class files in the project tree. Currently I need to manually trigger the recompilation to see error marks on my classes if the class cannot be compiled.
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Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
...ure_ascii=False switch to json.dumps(), then encode the value to UTF-8 manually:
>>> json_string = json.dumps("ברי צקלה", ensure_ascii=False).encode('utf8')
>>> json_string
b'"\xd7\x91\xd7\xa8\xd7\x99 \xd7\xa6\xd7\xa7\xd7\x9c\xd7\x94"'
>>> print(json_string.decode(...
Insert, on duplicate update in PostgreSQL?
...it would be much slower, because each upsert would be its' own individual call into the database.
– baash05
Mar 1 '12 at 0:27
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How can I specify a branch/tag when adding a Git submodule?
...hich commit their submodule directory points to. git submodule update actually merges in the new code.
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How do I list all files of a directory?
How can I list all files of a directory in Python and add them to a list ?
21 Answers
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“open/close” SqlConnection or keep open?
...th static methods. Each of these methods opens/closes SQL connection when called:
6 Answers
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Android - SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
I have the following layout (virtually empty):
18 Answers
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What does “async: false” do in jQuery.ajax()?
Specifically, how does it differ from the default ( async: true ) ?
7 Answers
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How can I pipe stderr, and not stdout?
...1 >/dev/null | grep 'something'
For the details of I/O redirection in all its variety, see the chapter on Redirections in the Bash reference manual.
Note that the sequence of I/O redirections is interpreted left-to-right, but pipes are set up before the I/O redirections are interpreted. File ...