是使用完全限定路径名（FQPN）请求文件时执行的任何类型的搜索

Question

If you request a file with it's fully qualified path name (FQPN) like /var/www/html/wp-content/uploads/2018/11/full-filename.jpg does the OS (be it Linux/Unix/Windows) and/or PHP perform any kind of "search" for the file or does the FQPN allow the file to be accessed directly?

What I'm trying to figure out is this -- If I have a folder with 10,000 files in it, and I request a file within that folder using its FQPN, is the retrieval of that file any slower than if it was requested from a folder that has only 10 files in it? Does the fact that the folder has 10,000 files in it have any impact on the speed of the file retrieval?

Answer 1

The query not different between file and folder, and sure 10 files fast then 10,000 files. So you need to keep the appropriate number at each layer, like 1,000 * 1,000 * 1,000 and not like 10 * 100,000 * 100. For today's computers, everyone can't feel quickly less than 10,000, but you're right, we can't just give up thinking about it.