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Performance optimization strategies of last resort [closed]
...perience. I tried to explain this in a Dr. Dobbs article in November 1993, by starting from a conventionally well-designed non-trivial program with no obvious waste and taking it through a series of optimizations until its wall-clock time was reduced from 48 seconds to 1.1 seconds, and the source co...
Find all packages installed with easy_install/pip?
...st list everything. They don't exclude the packages that weren't installed by pip.
– Eliad
Dec 15 '16 at 0:15
I also f...
Why does Decimal.Divide(int, int) work, but not (int / int)?
...s to me 0 , but if I use Decimal.Divide() I get the correct answer? I'm by no means a c# guy.
8 Answers
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Performance of Java matrix math libraries? [closed]
We are computing something whose runtime is bound by matrix operations. (Some details below if interested.) This experience prompted the following question:
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How to name and retrieve a stash by name in git?
I was always under the impression that you could give a stash a name by doing git stash save stashname , which you could later on apply by doing git stash apply stashname . But it seems that in this case all that happens is that stashname will be used as the stash description.
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How to determine if a point is in a 2D triangle? [closed]
...ite optimal) algorithm is checking on which side of the half-plane created by the edges the point is.
Here's some high quality info in this topic on GameDev, including performance issues.
And here's some code to get you started:
float sign (fPoint p1, fPoint p2, fPoint p3)
{
return (p1.x - p3...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
How do I install GCC (the GNU Compiler Collection) piece by piece, using the current version,
using the correct versions of dependencies, not using a package manager (like yum, rpm, apt, dpkg), and not using shared libraries?
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...
By default compilers optimize for "average" processor. Since different processors favor different instruction sequences, compiler optimizations enabled by -O2 might benefit average processor, but decrease performance on your ...
Understanding how recursive functions work
...h each copy of the function spawning a new copy of itself with a increased by 1, until the a > b condition is met.
By the time you reach the the a > b condition being true, you have a (potentially arbitrarily) long stack of copies of the function all in the middle of being run, all waiting on...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...Those access denied error shows up again.
I managed to solve this problem by fixing the privileges by the following command on the MySQL server bin/ directory as mentioned in here:
C:\MySQL Server 5.5\bin> mysql_upgrade
Then, the problem gone away. I hope this solution works on Linux too sinc...