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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
.../a/11227902/1001643
Compilers typically don't have enough information to know which branches will alias and whether those aliases will be significant. However, that information can be determined at runtime with tools such as Cachegrind and VTune.
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PHP parse/syntax errors; and how to solve them
...d all that other time wasting crap, when I'm just hoping for a quick edit. Now, if you're developing new features or starting from scratch, then, yes, do it in an IDE. You won't regret taking that bit of extra time at the start to set it up.
– 1934286
Mar 6 '17...
How to automatically generate a stacktrace when my program crashes
...9/csu/../sysdeps/i386/elf/start.S:122(_start)[0x8049801]
If you want to know the gory details, the best source is unfortunately the source: See http://sourceware.org/git/?p=glibc.git;a=blob;f=debug/segfault.c and its parent directory http://sourceware.org/git/?p=glibc.git;a=tree;f=debug
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How to make a SIMPLE C++ Makefile
...tool called Make is a build dependency manager. That is, it takes care of knowing what commands need to be executed in what order to take your software project from a collection of source files, object files, libraries, headers, etc., etc.---some of which may have changed recently---and turning them...
Rotated elements in CSS that affect their parent's height correctly
...dth of your element is small enough that the text wraps: */
white-space: nowrap;
}
Stack snippet demo
p {
/* Tweak the visuals of the paragraphs for easier visualiation: */
background: pink;
margin: 1px 0;
border: 1px solid black;
}
.rotation-wrapper-outer {
display: table;...
Extracting .jar file with command line
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Thanks, everything is fine now!
– Bobby C
Dec 11 '11 at 2:31
2
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Virtual Memory Usage from Java under Linux, too much memory used
...te segment that contains global per-process data for the library (I don't know what the segment with no permissions is; I've only seen it on x64 Linux). The read-only portion of the library can be shared between all processes that use the library; for example, libc has 1.5M of virtual memory space t...
Could not reliably determine the server's fully qualified domain name
...this broke apache until I set ServerName localhost in the global context. Now the vhost is working again and the SSL cert is being served properly.
– AaronM
Oct 12 '15 at 16:07
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What are some uses of template template parameters?
...lustrative, is no longer an amazing example due to c++11 introducing auto. Now the same function can be written as:
template <class Cont>
void f(Cont &v) {
auto temp = v.back();
v.pop_back();
// Do some work on temp
std::cout << temp << std::endl;
}
which i...
What's invokedynamic and how do I use it?
... the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better?
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