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How does Java handle integer underflows and overflows and how would you check for it?
...r absolute value than the computer can actually represent in memory on its CPU. So underflow does not apply to Java Integers. @BalusC
– Jingguo Yao
Oct 14 '18 at 15:10
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How much is the overhead of smart pointers compared to normal pointers in C++?
...plementation details and CPU architecture for write barriers, atomic locks etc. once listening you will never talk about this feature being cheap. If you just want a proof of the magnitude slower, skip the first 48 minutes and watch him running example code which runs upto 180 times slower (compiled...
AsyncTask threads never die
...xecution. How many will run at once is based on the number of cores of the CPU. AFAIK, the current algorithm is 2N+1 parallel threads, where N is the number of cores.
– CommonsWare
Feb 16 '18 at 11:40
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How can I list the contents of a directory in Python?
...t have to os.path.isdir/file to know if it's a file or not, and that saves CPU time because stat is already done when scanning dir in Windows:
example to list a directory and print files bigger than max_value bytes:
for dentry in os.scandir("/path/to/dir"):
if dentry.stat().st_size > max_va...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...differ by a a multiple of 4096 have a false dependency on Intel SnB-family CPUs. (i.e. same offset within a page). This can reduce throughput when some of the operations are stores, esp. a mix of loads and stores.
– Peter Cordes
Mar 18 '16 at 1:52
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How do Trigonometric functions work?
...ation, you should NOT be using it. That goes for Taylor, Chebyshev, Padé, etc. series. Taylor series are often Good Enough.
– kquinn
Feb 7 '09 at 22:52
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Encrypting & Decrypting a String in C# [duplicate]
... you to "muck about" with byte arrays, salts, keys, initialization vectors etc. but this is precisely the kind of detail that can be somewhat abstracted away within your "wrapper" class.
The following class is one I wrote a while ago to perform exactly the kind of thing you're after, a simple singl...
How can I delay a method call for 1 second?
... parts of the UI. My instinct is that it would also cause some unnecessary CPU or other resource drain, but I haven't checked.
– Bjorn Roche
Jun 3 '16 at 20:19
add a comment
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Why is String.chars() a stream of ints in Java 8?
...l methods of java.lang.Character as well as StringBuilder.appendCodePoint, etc. This support exists since jdk1.5.
– Holger
Mar 18 '14 at 9:01
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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...running the inner loop takes longer than that to fill the buffer, then the CPU will be the limiting factor. If the inner loop runs faster, then I/O will be the limiting factor, or at least there's some CPU time left over to do the real work.
– Ben Voigt
Dec 3 ...