Plod: Phorum作者Brian Moon的小贴士

2006年09月 14日

　　在刘昕推荐看的一篇Phorum项目创建者“月亮的脑袋瓜子”(呵呵，kidding，Brian Moon，布莱恩·摩恩，摩恩水龙头？呵呵，kidding again)采访录中，Brian提到了他关于提高PHP代码执行效率的几点个人建议:

Avoid classes. I am not saying never, just make sure you need a class before you make it. If it only has one or two methods that share no data, just use functions. Classes are faster now than ever in PHP, but a function still wins.
Using " or ' does not matter for speed. Neither does breaking a string to insert a variable.
This is gonna be a shock to some, but write your own code and don't use stuff like Smarty, PEAR and other PHP libraries. Its just faster to write the code you need to do what you need to do. All that weight will slow you down. The Phorum core does not rely on any 3rd party PHP code.
Use EXPLAIN on every query you write. You won't, but if you strive to, you will be better for it.
Its ok to use USE INDEX in your queries if it makes them faster. MySQL is good, but sometimes the human mind is better.
Use temporary tables in MySQL and join with them when working with lots of data. Returning all that data to PHP is slow. The Phorum search is a good example of this. We only return the data you see on screen because we do all our sorting and filtering in temporary tables on the MySQL side. It was a huge perfomance gain.
Lastly, benchmark stuff. Don't assume you know what is slow and what is fast. Phorum has a nice little set of timing functions in the distro you can use. If the difference is less than .001, forget about it.

　　相信会编程的都应该看得懂英文，看不懂的也应该心有灵犀，所以就不翻译了，的确很受用:)

Posted by POPOEVER at 2006年09月14日 14:08 | back to top

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