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Fastest way to reset every value of std::vector to 0
What's the fastest way to reset every value of a std::vector<int> to 0 and keeping the vectors initial size ?
6 An...
Deleting lines from one file which are in another file
... When this works (input files are sorted), this is extremely fast!
– Mike Jarvis
Sep 4 '15 at 22:09
As i...
Best XML Parser for PHP [duplicate]
...kes the cake because it is firstly an extension, written in C, and is very fast. But second, the parsed document takes the form of a PHP object. So you can "query" like $root->myElement.
share
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Scanner vs. StringTokenizer vs. String.Split
...ited by fixed substrings. Because of this restriction, it's about twice as fast as String.split(). (See my comparison of String.split() and StringTokenizer.) It also predates the regular expressions API, of which String.split() is a part.
You'll note from my timings that String.split() can still t...
How much faster is C++ than C#?
... why a bytecode based language like C# or Java that has a JIT cannot be as fast as C++ code. However C++ code used to be significantly faster for a long time, and also today still is in many cases. This is mainly due to the more advanced JIT optimizations being complicated to implement, and the real...
Why is string concatenation faster than array join?
...8 didn’t have such an optimization, and so the array technique is always faster than the plus operator.
— Writing Efficient JavaScript: Chapter 7 – Even Faster Websites
The V8 javascript engine (used in Google Chrome) uses this code to do string concatenation:
// ECMA-262, section 15.5...
Preferred Java way to ping an HTTP URL for availability
...tStackTrace(); }
return false;
}
Possible Questions
Is this really fast enough?Yes, very fast!
Couldn’t I just ping my own page, which I want
to request anyways? Sure! You could even check both, if you want to
differentiate between “internet connection available” and your own
servers b...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
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Git is very fast, scales very well, and is very transparent about its concepts. The down side of this is that it has a relatively steep learning curve. A Win32 port is available, but not quite a first-class citizen. Git exposes hashes as...
Algorithms based on number base systems? [closed]
...N = 3K + 2
As it's "obvious" (jokingly) that some of these equations are fast in the first system and some better in the second - so it is a good idea to choose the best of those depending on N. But this would require fast modulo operation for both 2 and 3. Here's why the double base comes in - yo...
Initialize a byte array to a certain value, other than the default null? [duplicate]
...e extensive benchmarking and a decrementing for loop is typically twice as fast as an incrementing for loop, when the body has only a simple instruction such as filling an array element.
– deegee
Jun 18 '13 at 21:47
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