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家政O2O百家争鸣后的卡位战：烧钱补贴并非良药 - 资讯 - 清泛网移动版 - 专...
...少业内人士表示，今年或将迎来真正的家政O2O大战，那么问题来了，怎么战？融资后的钱是否仅有补贴一道？
未来存活率仅有5%
国内巨大的家政需求吸引着一系列创业者的关注，根据“云家政”去年年底发布的北上广深四地家...
Virtual functions and performance - C++
...e a very slight effect on performance, but it's unlikely to affect the overall performance of your application. Better places to look for performance improvements are in algorithms and I/O.
An excellent article that talks about virtual functions (and more) is Member Function Pointers and the Fastes...
How do I prevent an Android device from going to sleep programmatically?
How do I prevent an Android device from going to sleep programmatically?
8 Answers
8
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Greenlet Vs. Threads
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Greenlets provide concurrency but not parallelism. Concurrency is when code can run independently of other code. Parallelism is the execution of concurrent code simultaneously. Parallelism is particularly useful when there's a lot of work to be done in userspace, an...
SQL Server Management Studio, how to get execution time down to milliseconds
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The part regarding the Properties window is really the answer to this thread. "Elapsed Time" is sitting there staring you in the face.
– Eric
Jan 20 '15 at 23:32
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What's a good rate limiting algorithm?
...ng, you definitely do not want to use time.clock(), which measures elapsed CPU time. CPU time can run much faster or much slower than "actual" time. You want to use time.time() instead, which measures wall time ("actual" time).
– John Wiseman
Dec 21 '15 at 23...
window+nginx+php-cgi的php-cgi线程/子进程问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
window+nginx+php-cgi的php-cgi线程/子进程问题见bbshttp: bbs csdn net topics 390803643 close正常的配置情况下,window的php-cgi是不会出现多线程 子进程的,例如以下配置fastcgi_pass 见bbs
http://bbs.csdn.net/topics/390803643/close
正常的配置情况下,window...
What is the difference between concurrency, parallelism and asynchronous methods?
Concurrency is having two tasks run in parallel on separate threads. However, asynchronous methods run in parallel but on the same 1 thread. How is this achieved? Also, what about parallelism?
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When to use PNG or JPG in iPhone development?
...more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algorithm. But the typical compression and image quality is usually quite sufficient for photos.
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为什么你得学些 TCP 的知识？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...时候，我又记起来了。
所以我认为——这不可能是我的问题，可能吗？可能吗？？然后我发了一封邮件给我团队说：“我想我快要疯了，但是这可能是 TCP 的问题”。
所以我提交了一次修订，将我的应该调整为 TCP_NODELAY，然后...