大约有 3,700 项符合查询结果（耗时：0.0329秒） [XML]
Creating a comma separated list from IList or IEnumerable
...nchmarkDotNet=v0.10.5, OS=Windows 10.0.14393
Processor=Intel Core i5-2500K CPU 3.30GHz (Sandy Bridge), ProcessorCount=4
Frequency=3233539 Hz, Resolution=309.2587 ns, Timer=TSC
[Host] : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0
Clr : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0
Core :...
Removing trailing newline character from fgets() input
...trimming is usually not an issue given code is doing I/O - a black hole of CPU time. Should following code need the string's length or is highly performance conscious, use this strlen() approach. Else the strcspn() is a fine alternative.
...
java.util.regex - importance of Pattern.compile()?
...n the heap in methods called thousands of times is usually much lighter on CPU, memory and thus the GC.
– Volksman
Apr 14 '18 at 3:22
...
Why does integer overflow on x86 with GCC cause an infinite loop?
...y integers wrap around, but on occasion weird stuff happens".
Yes, on x86 CPUs, integers usually wrap the way you expect. This is one of those exceptions. The compiler assumes you won't cause undefined behavior, and optimizes away the loop test. If you really want wraparound, pass -fwrapv to g++ or...
Difference between Statement and PreparedStatement
...than disk operations which are an order of magnitude slower than in-memory CPU operations. Hence, any reduction in amount of data sent over the network will have a good effect on overall performance.
They protect against SQL injection, by escaping text for all the parameter values provided.
They pr...
Hidden Features of PHP? [closed]
...in the language core and are used all over the place which results in good CPU cache locality. Perl and Python both use separate language constructs for lists and maps resulting in more copying and potentially confusing transformations.
...
Download File Using Javascript/jQuery
...ry at least as large as the file being downloaded and/or other interesting CPU side effects.
fetch('https://jsonplaceholder.typicode.com/todos/1')
.then(resp => resp.blob())
.then(blob => {
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a'...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...至它即便不是一个CDerived你也可以这样做。
当然，这个问题只在如果你做了多继承时发生。在你将CDerived转换 到 CBaseX时static_cast<> 和 reinterpret_cast<>是没有区别的。
情况3：void*之间的向前和向后转换
因为任何指针可以被转...
Why are primes important in cryptography?
... @stujo: same principles will rule when all of us use Quantum CPUs, as primes can keep growing, its all about finding larger, impractical for quantum CPUs, the problem exists if some use regular CPUS to create keys, and some use Quantum CPUs to break those. The power of quantum CPUs, as...
Best way to check if object exists in Entity Framework?
...housands of database calls were being made to check for duplicates (so the CPU sent a lot of time at 100%). In the end I decided to keep the last 100,000 records cached in memory. This way I could check for duplicates against the cached records which was extremely fast when compared to a LINQ quer...