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Pointers vs. values in parameters and return values
...n find situations where copying even large structs turns out a performance win, but the rule of thumb is not to.
For slices, you don't need to pass a pointer to change elements of the array. io.Reader.Read(p []byte) changes the bytes of p, for instance. It's arguably a special case of "treat littl...
How to debug Lock wait timeout exceeded on MySQL?
...ile it waits for something non-MySQL-related to happen."
After re-re-reviewing the show engine innodb status log (once I'd tracked down the client responsible for the lock), I noticed the stuck thread in question was listed at the very bottom of the transaction list, beneath the active queries that...
Image comparison - fast algorithm
...eat for all images in the database, and the match with the smallest result wins. You'd probably want to have a threshold, above which the algorithm concludes that no match was found.
Third Choice - Keypoints + Decision Trees
A third approach that is probably much faster than the other two is us...
Colors in JavaScript console
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on my console it gets clipped on overflowing the line's height (Chrome 69, WIN7)
– vsync
Sep 18 '18 at 13:16
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How do I plot in real-time in a while loop using matplotlib?
...ause(0.05) to both draw the new data and it runs the GUI's event loop (allowing for mouse interaction).
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Should I use Vagrant or Docker for creating an isolated environment? [closed]
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The only reason you could want to use Vagrant is if you need to do BSD, Windows or other non-Linux development on your Ubuntu box. Otherwise, go for Docker.
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Differences between Java 8 Date Time API (java.time) and Joda-Time
... LocalTime) and the composition (called LocalDateTime). That is a very big win compared with old java.util.Calendar and java.util.Date.
d) Both libraries use a method-centric approach meaning they encourage the user to use getDayOfYear() instead of get(DAY_OF_YEAR). This causes a lot of extra metho...
What happens when a computer program runs?
...order on some systems (see Billy O'Neal's answer below for more details on Win32).
Other systems can be very different. DOS, for instance, ran in real mode, and its memory allocation when running programs looked much differently:
+-----------+ top of memory
| extended | above the high memory a...
Regex Pattern to Match, Excluding when… / Except between
...I'm not always a fan of visualizations, but this one does a good job of showing how simple the method is. Each "line" corresponds to a potential match, but only the bottom line is captured into Group 1.
Debuggex Demo
Perl/PCRE Variation
In contrast to the general solution above, there exists a...
Swift Beta performance: sorting arrays
...ns, that are safe for most code. It can yield significant high-performance wins from the compiler.
They all but advocate it. Whether that's wise or not I couldn't say, but from what I can tell it seems reasonable enough to use [-Ofast] in a release if you're not doing high-precision floating point...