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https://www.tsingfun.com/it/cpp/1419.html 

ZeroMQ的学习和研究(PHP代码实例) - C/C++ - 清泛网 - 专注C/C++及内核技术

...订阅者,必然会丢失掉一部分信息,这是这个模式的一个问题,所谓的 Slow joiner。稍后,会解决这个问题。 d) 但是,如果 Publisher 中途离开,所有的 Subscriber 会 hold 住,等待 Publisher 再上线的时候,会继续接受信息。 ZMQ 的 PipeL...
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How does one write code that best utilizes the CPU cache to improve performance?

... The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth). Techniques for ...
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How many threads can a Java VM support?

...ts. There are several parameters here. The specific VM, plus there are usually run-time parameters on the VM as well. That's somewhat driven by the operating system: what support does the underlying OS have for threads and what limitations does it put on them? If the VM actually uses OS-level thr...
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App Inventor 2 中文网 · 升级日志

...验。 优化 优化部分功能;解决“翻译器”崩溃问题;部分文档翻译;菜单优化等。 230710 2023/07/10 全新 “密码修改”功能全新上线!如遗忘初始密码,请联系客服重置。 优化 优化部分功能...
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Format floats with standard json module

...loat class in Tom Wuttke's answer works, but only if %g encoding works globally for your application. The %.15g is a bit magic, it works because float precision is 17 significant digits and %g does not print trailing zeroes. I spent some time trying to make a PrettyFloat that allowed customization ...
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Spinlock versus Semaphore

...ck (or, the other way around, a lock is a special case of a semaphore). Usually, but not necessarily, spinlocks are only valid within one process whereas semaphores can be used to synchronize between different processes, too. A lock works for mutual exclusion, that is one thread at a time can acqui...
https://www.tsingfun.com/it/tech/1429.html 

正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...,所以本页排版比较混乱,推荐你到原处查看,看完了如果有问题,再到这里来提出. 一些要说的话: 如果你没有正则表达式的基础,请跟着教程“一步步来”。请不要大概地扫两眼就说看不懂——以这种态度我写成什么样你也看...
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How do I fix the Visual Studio compile error, “mismatch between processor architecture”?

...T 4.5, although I suppose it might have been possible before. First, it really is just a warning. It should not hurt anything if you are just dealing with x86 dependencies. Microsoft is just trying to warn you when you state that your project is compatible with "Any CPU" but you have a dependency o...
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Retrieve CPU usage and memory usage of a single process on Linux?

I want to get the CPU and memory usage of a single process on Linux - I know the PID. Hopefully, I can get it every second and write it to a CSV using the 'watch' command. What command can I use to get this info from the Linux command-line? ...
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What is a good regular expression to match a URL? [duplicate]

... I changed your expression a bit so it will work in all cases i need, including uri with http:// or www "/([^\s\.]+\.[^\s]{2,}|www\.[^\s]+\.[^\s]{2,})/gi" – Ismael Jan 14 '15 at 11:08 ...