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Node.js vs .Net performance
...be the callback from a http rest request you made. Node tries to maximize CPU efficiency by eliminating thread context switches. Because node made this opinionated choice that ALL I/O is asynchronous, that also means that all it's frameworks/add-ons support this choice. It's easier to write apps t...
OPTION (RECOMPILE) is Always Faster; Why?
...Commits, or your Cross Product was fine for a smaller set but now takes up CPU and Memory as it scales larger, this may also be true for using DISTINCT, you are calling a function for every row, your key matches don't use an index because of CASTING type conversion or NULLS or functions... Too many...
How does libuv compare to Boost/ASIO?
... Process
Spawning: yes Process
System Queries:
CPU: yes no
Network Interface: yes no
Serial Ports: no yes
TTY: yes no
Shared Library Loading: yes Extension[2]
...
Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...在DeleteDirectory里实现删除目录的同步），而删除文件则没问题。
这里有一点需要注意：因为执行Cleanup之前，可能会多次调用CreateFile，比如记事本保存文档时就会执行两次CreateFile之后再调用Cleanup，所以我在Cleanup的最后执行MySet...
How do you parse and process HTML/XML in PHP?
...k.
Again, I would not recommend this parser. It is rather slow with high CPU usage. There is also no function to clear memory of created DOM objects. These problems scale particularly with nested loops. The documentation itself is inaccurate and misspelled, with no responses to fixes since 14 Apr ...
How do I uniquely identify computers visiting my web site?
...
Data has to be encrypted / decrypted and signed / verified which creates cpu overhead on client (not so bad) and server (bah!).
Data is deleted when user deletes their cookies and cache. (this is what I want really)
Data is unavailable for analytics when users go off-line. (analytics for currently...
List of Big-O for PHP functions
... array size has nothing to do with algorithmic complexity, it is caused by CPU cache effects. The larger the array is, the more likely it is that random-access lookups will result in cache misses (and cache misses higher in the hierarchy).
– NikiC
Jan 28 '16 at...
How to use glOrtho() in OpenGL?
...nGL 4 programs calculate the transformation matrix (which is small) on the CPU, and then give the matrix and all points to be transformed to OpenGL, which can do the thousands of matrix multiplications for different points really fast in parallel.
Manually written vertex shaders then do the multipl...
In C++, is it still bad practice to return a vector from a function?
...e at a time, which I have verified by re-running the test while monitoring CPU usage). The best performance is achieved when mem(v) = 16kB, which is the order of magnitude of L1 cache (L1 data cache for the i7-7700K is 4x32kB).
Of course, the differences become less and less relevant the more compu...
C dynamically growing array
... processing various things. I would like to avoid using too much memory or CPU for keeping such indexes...
7 Answers
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