Don't diddle code to make it faster—find a better algorithm.

不要为了使代码更快而胡乱编写代码——要找到更好的算法。

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This book is designed to make you a better algorithm designer.

本书的设计目标是让你成为一个更好的算法设计者。

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Unfortunately, when it comes to issues of performance, often a better algorithm is the best solution.

不幸的是，谈到性能问题，一个更好的算法通常才是最好的解决方案。

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They are computationally challenged, meaning, at the time they were invented, they were perfectly good sorting algorithms, there are better ones, we're going to see a much better one next time around, but this is a good way to just start thinking about how to do the algorithm, or how to do the sort.

他们是相当棒的排序算法，是有更好的算法，我们下一次,就会看一个更好的，但是开始想想,如何完成算法，或者说是如何排序,是一个好的学习方法,恩，再试试吧,如何来排序呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

It is certainly possible, for example, that a quadratic algorithm could run faster than a linear algorithm. It depends on what the input is, it depends on, you know, what the particular cases are. So it is not the case that, on every input, a linear algorithm is always going to be better than a quadratic algorithm.

一个二次平方级复杂度的算法,当然也是可能跑的比线性复杂度算法快的,这取决于，你知道的，输入以及特定的案例，因此并不是对于每个输入,线性复杂度就一定会,比二次平方级复杂度的算法的表现要好,只是通常来说是这样的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Two months later they come up with a new compression algorithm that makes the picture much better.

FORBES: Chips that change their spots

The promise is that, with the aid of a special algorithm, the band will help you sleep better, wake up happier and nap more effectively.

ENGADGET: Jawbone Up review (2012): a reboot and a shot at redemption