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Virtual functions and performance - C++

...curious, so I went ahead and ran some timings on the 3GHz in-order PowerPC CPU we work with. The test I ran was to make a simple 4d vector class with get/set functions class TestVec { float x,y,z,w; public: float GetX() { return x; } float SetX(float to) { return x=to; } // and so on...
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创业测试:50个迹象表明你真该创业了 - 资讯 - 清泛网 - 专注C/C++及内核技术

...个很吓人的过程,需要大量辛勤的劳作。但是是否创业这问题日夜都在困扰着你。至于原因,或许你仅仅是不满足于自己的现状;或许你是渴望开一家属于自己的店铺或是咨询公司;再或者只是你觉得你的生活需要一个显著的变化...
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How can I check if a Perl array contains a particular value?

...grep, hash... any: 0 wallclock secs ( 0.67 usr + 0.00 sys = 0.67 CPU) @ 149253.73/s (n=100000) first: 1 wallclock secs ( 0.63 usr + 0.01 sys = 0.64 CPU) @ 156250.00/s (n=100000) grep: 42 wallclock secs (41.95 usr + 0.08 sys = 42.03 CPU) @ 2379.25/s (n=100000) hash: 0 ...
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Subversion钩子 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...一个PHP项目使用Subversion做版本控制,使用中发现了一些问题,比如程序员不写日志,或者提交的文件有BOM,或者提交的文件有语法错误,或者提交的文件不符合编码规范等等,这些问题都可以利用pre-commit钩子来解决,实际上已...
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Discuz X 首页白板解决之道 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...在合适位置打印特定内容然后exit(0);查看结果,分析出现问题的 1、开启Debug,及url后面跟 &debug=yes,也是网上最多的方法,但可能往往没有效果。 2、排除法,代码一段段的排查,在合适位置打印特定内容然后exit(0);查看结果,...
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提问 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...sp;使用下面程序时,为什么每次都会把实际数字设为0问题出在你的判断逻辑上: 这里和你拼接的字符串比较,非常容易出错,比如多了或少了一个空格等。实际编程中判断最好使用数字,也就是你选择了难度等级是第几...
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最大装载数不显示计算数值 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...数输出+(高数输出×横数输出)÷2=最大装载数 出现问题不显示计算数字代码块没有问题,经过测试是能够正确计算出除法结果的,测试时主要被除数要大于除数,否则计算结果0.xxx 向下取整就是0,干扰测试结果。。。之后...
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/

.... @echo off setlocal del /q /f %temp%\timestampfile_* Logman.exe stop ts-CPU 1>nul 2>&1 Logman.exe delete ts-CPU 1>nul 2>&1 Logman.exe create counter ts-CPU -sc 2 -v mmddhhmm -max 250 -c "\Processor(_Total)\%% Processor Time" -o %temp%\timestampfile_ >nul Logman.exe start ...
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How to see top processes sorted by actual memory usage?

... Yes N PID Yes P %CPU Yes T TIME+ Yes Or alternatively: hit Shift + f , then choose the display to order by memory usage by hitting key n then press Enter. You will see active pr...
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How to detect idle time in JavaScript elegantly?

...ls the function, rather than letting it sit idle by. It doesn't catch zero CPU usage directly, but that is impossible, because executing a function causes CPU usage. And user inactivity eventually leads to zero CPU usage, so indirectly it does catch zero CPU usage. ...