Daily Productive Sharing 1059 - Optimizations
One helpful tip per day:)
What is code optimization, and how do you optimize it? Paul W. Homer explains it clearly in just a few words:
- Abstractly, code can be divided into three categories: ordinary code, redundant code, and optimized code. The second type is actually a variant of the first, but slower and more bloated; the third type is an optimized version of the first, more concise and faster.
- In many cases, so-called code optimization is about turning the second type of code back into the first type.
- Turning the first type of code into the third type requires a deeper understanding of computational logic to find faster ways of processing.
- Most importantly, code is just a set of instructions for performing calculations. We should aim to write code correctly the first time, at least as the first type, but ideally as the third type.
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什么是代码优化？如何优化？Paul W. Homer 用三言两语把这些讲得清清楚楚：
- 抽象来讲，可以把代码分为三类，一种是普通代码，一种是冗余代码，最后一种是优化后的代码。第二种其实是第一种的变体，变得更慢，更臃肿；第三种是第一种的优化版本，更简洁，运行得更快；
- 很多情况下，所谓的代码优化是吧第二种代码变成第一种；
- 要把第一种代码变成第三种，意味着要更熟悉计算逻辑，从而找到更快的运算方式；
- 最重要的是，代码只是用来执行计算的指令。我们要尽可能地在第一次写代码时就把代码写好，至少是第一种代码，最好是第三种代码。
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