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How to create a sub array from another array in Java?
... something like REP STOSW by the JIT (in which case the loop is inside the CPU).
int[] src = new int[] {1, 2, 3, 4, 5};
int[] dst = new int[3];
System.arraycopy(src, 1, dst, 0, 3); // Copies 2, 3, 4 into dst
share
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How to sum up an array of integers in C#
...= arr.AsParallel().Sum(); a faster version that uses multiple cores of the CPU. To avoid System.OverflowException you can use long sum = arr.AsParallel().Sum(x => (long)x); For even faster versions that avoid overflow exception and support all integer data types and uses data parallel SIMD/SSE in...
How to create an infinite loop in Windows batch file?
...ver reason. It may however be wise to put a small wait in the loop to stop cpu thrashing if my program dies instantly for some reason.
– John Hunt
Jun 17 '15 at 10:27
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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 ...
Python pandas: fill a dataframe row by row
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just want to ask, is this CPU and memory efficient?
– czxttkl
Jun 29 '17 at 18:52
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防挂马：apache禁止访问文件或目录执行权限、禁止运行脚本PHP文件的设置方...
... </FilesMatch>
</Directory>
这些配置表面上看起来是没什么问题的，确实在windows下可以这么说。
但是Linux就不同了，大家都是知道的linux操作系统是区分大小写的，这里如果换成大写后缀名*.phP一类就pass了
这里我说下我个人的解...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...ral erratum and will not emit code that compensates for it.)
Why does the CPU have such a false dependency?
We can speculate: it runs on the same execution unit as bsf / bsr which do have an output dependency. (How is POPCNT implemented in hardware?). For those instructions, Intel documents the ...
半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术
...导致xml解析失败，或者sql执行错误的异常。为了解决这个问题，有必要找到并删除半个汉字，或者存放的时候，即便截断，也不产生新的半个汉字。
以下是我近期对半个汉字的处理，C++代码如下：
// strSrc: 原始字符串
// n...
C++代码执行安装包静默安装 - C/C++ - 清泛网 - 专注C/C++及内核技术
...L, NULL, NULL, szWorking, &si, &pi );
这种方式貌似还是不能解决问题，具体原因没有深入详查，最终采用了方案3，完美解决。
//在系统进程中查找explorer.exe，并获取其访问令牌
DWORD WINAPI INTER_GetExplorerToken( OUT PHANDLE phExplorerToken )
{ ...
How exactly does the callstack work?
...of programming languages work and especially how they interact with the OS/CPU. I've probably read every answer in every stack/heap related thread here on Stack Overflow, and they are all brilliant. But there is still one thing that I didn't fully understand yet.
...