不用分析我就能知道性能问题出在哪里

我一直认为，任何为任何语言编写任何代码的人都会使用编辑程序。

I was working with a client of mine who had me on mostly as support and to write some of the more complex things for him. Well one day he messed up a file, big time. He accidentally saved over three hours worth of his own work, and when I asked him why he didn't save more often he replied with, "because I wasn't done". Naturally, this was not an acceptable answer, and I poked and prodded a little further. I eventually came to find out that he he has never used any editing program, EVER! Not even notepad.exe! He had been using an online CPanel editor for files! It didn't even have a 'Find' function. He couldn't ever save until he was done because he was editing the live file on the site!

不用说，我很惊讶，他至今仍在使用CPanel编辑器……

这种编程是不可能的。

不是开玩笑的，我一直认为编程是一种不可能学会的东西，我总是远离它。当我接近代码的时候，我永远也无法理解它。

然后有一天，我坐下来阅读了一些基本的初学者教程，并从那里开始学习。现在我是一名程序员，我热爱工作的每一分钟。

另外，我认为编程并不容易，它是一个挑战，我更喜欢学习，没有什么比解决一些编程问题更有趣的了。

分析和性能分析是一回事。

然后我发现，虽然分析器总比没有强，但它包含错误的假设，比如:

只有总量才重要，细节无关紧要 统计精度是定位性能问题的必要条件 测量时间和定位不必要的耗时操作是一回事

编程很简单。

假设我要使程序100%完成，没有错误，并报告它为“完成”。有时，公司想要在程序存在很多漏洞时发布该程序，以抢占市场份额。