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致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术

致PHP路上的“年轻人”今晚公司,又与一位刚做PHP工作一年的朋友聊了甚久。他与他们有一样的问题,比较迷茫。而我当年也有他们的困惑。虽然自己也还年轻,但作...今晚公司,又与一位刚做PHP工作一年的朋友聊了甚久。...
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Why is Go so slow (compared to Java)?

... 0.84 30% 28% 98% 34% C gcc 0.42 145,900 812 0.57 0% 26% 20% 100% pidigits 1.21x Go 2.10 8,084 603 2.10 0% 100% 1% 1% C gcc 1.73 1,992 448 1.73 1% 100% 1% 0% fasta 1.45x Go 1.97 3,456 1344 5.76 76% 71% 74% 73% C gcc 1.36 2,800 1993 ...
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Find a Git branch containing changes to a given file

...grep -o "refs/heads/.*" | sort -u | xargs -I '{}' git log -1 --format=%aI%x20%S '{}' -- <filename> | sort -r This will result in output like this: 2020-05-07T15:10:59+02:00 refs/heads/branch1 2020-05-05T16:11:52+02:00 refs/heads/branch3 2020-03-27T11:45:48+00:00 refs/heads/branch2 ...
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Java code To convert byte to Hexadecimal

...with char array for HEXES constant, instead String and charAt(), you gain ~20% more speed. – Dyorgio Jul 26 '18 at 17:45 add a comment  |  ...
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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...

...完全断开,否则大量僵死的连接会浪费许多服务器资源。众多TCP状态中,最值得 注意的状态有两个:CLOSE_WAIT和TIME_WAIT。 1、LISTENING状态 TCP服务启动后首先处于侦听(LISTENING)状态。 2、ESTABLISHED状态 ESTABLISHED的意思是建立...
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How to iterate through two lists in parallel?

...ent of foo to index bar can yield equivalent or faster performances (5% to 20%) than the zip() function. Making sense of these results: A programmer has to determine the amount of compute-time per operation that is meaningful or that is of significance. For example, for printing purposes, if this...
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How to make git mark a deleted and a new file as a file move?

...old, e.g. $ git log -M20 -p --stat to reduce it from the default 50% to 20%. share | improve this answer | follow | ...
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搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...

搭建高可用mongodb集群(二)—— 副本集上一篇文章《搭建高可用MongoDB集群(一)——配置MongoDB》提到了几个问题还没有解决。主节点挂了能否自动切换连接?目前需要手工切换。 上一篇文章《搭建高可用MongoDB集群(一...
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

浅析为什么char类型的范围是 -128~+127C语言中, signed char 类型的范围为-128~127,每本教科书上也这么写,但是没有哪一本书上(包括老师)也不会给你为什么是-128~127,这...C语言中, signed char 类型的范围为-128~127,每本教科书上...
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C#位运算符(C#按位与、按位或 等) - 更多技术 - 清泛网 - 专注C/C++及内核技术

C#位运算符(C#按位与、按位或 等)C#中可以对整型运算对象按位进行逻辑运算。按位进行逻辑运算的意义是:依次取被运算对象的每个位,进行逻辑运算,每个位的逻辑...(详解1) C#中可以对整型运算对象按位进行逻辑运...