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How can I profile C++ code running on Linux?
...action of samples containing it, regardless of the number of times it may occur within a sample.
Another objection I often hear is: "It will stop someplace random, and it will miss the real problem".
This comes from having a prior concept of what the real problem is.
A key property of performance p...
How can I view the source code for a function?
...)
{
chk.s(...)
tcrossprod(solve(x))
}
<bytecode: 0x000000000ea2cc70>
<environment: namespace:Matrix>
Signatures:
x
target "diagonalMatrix"
defined "diagonalMatrix"
There are also methods with more complex signatures for each method, for example
requir...
What is the performance cost of having a virtual method in a C++ class?
...bout the cost unless the function is something like a trivial Get()/Set() accessor, in which anything other than inline is kind of wasteful. A 7ns overhead on a function that inlines to 0.5ns is severe; a 7ns overhead on a function that takes 500ms to execute is meaningless.
The big cost of virtual...
How do I select a merge strategy for a git rebase?
...ts are being replayed on top of your branch. . Your commits are "theirs" according to merge operation, and current (fast-forwarded) state of local branch is "ours". May seem counterintuitive, but once you realize what is actually happening, it makes sense.
– patrikbeno
...
How can I unit test Arduino code?
...d know that doing so is likely to disrupt any functionality that requires accurate timing like generating other signals at the same time. This problem has happened to me.
Again, if you were to test your sketch using an emulator and your time-critical routines ran perfectly until you uploaded to th...
Change navbar color in Twitter Bootstrap
... #DDD;
}
.navbar-default .navbar-toggle .icon-bar {
background-color: #CCC;
}
@media (max-width: 767px) {
.navbar-default .navbar-nav .open .dropdown-menu > li > a {
color: #777;
}
.navbar-default .navbar-nav .open .dropdown-menu > li > a:hover,
.navbar-defaul...
Stack smashing detected
...ck Smashing here is actually caused due to a protection mechanism used by gcc to detect buffer overflow errors. For example in the following snippet:
#include <stdio.h>
void func()
{
char array[10];
gets(array);
}
int main(int argc, char **argv)
{
func();
}
The compiler, (in t...
Git Symlinks in Windows
...ion, mainly regarding an increased potential for repository pollution, or accidentally adding duplicate files while they're in their "Windows symlink" states. (More on this under "limitations" below.)
Yes, a post-checkout script is implementable! Maybe not as a literal post-git checkout step, but th...
What is the list of supported languages/locales on Android?
...uwait)]
ar_LB [Arabic (Lebanon)]
ar_LY [Arabic (Libya)]
ar_MA [Arabic (Morocco)]
ar_MR [Arabic (Mauritania)]
ar_OM [Arabic (Oman)]
ar_PS [Arabic (Palestine)]
ar_QA [Arabic (Qatar)]
ar_SA [Arabic (Saudi Arabia)]
ar_SD [Arabic (Sudan)]
ar_SO [Arabic (Somalia)]
ar_SS [Arabic (South Sudan)]
ar_SY [Arabi...
Volatile vs. Interlocked vs. lock
Let's say that a class has a public int counter field that is accessed by multiple threads. This int is only incremented or decremented.
...