This article focuses on the exact wrong reason you want to pick a lightweight framework: file size. Does it really make any difference whether your framework is 300kb vs. 3MB? Unless you're hosting off a floppy drive, no. Total size of all the files in a framework does not really say anything about its speed, scalability, ease of use, etc.

If you're going to compare frameworks to find one that's smaller/lighter and therefore faster and/or more scalable, that's interesting and please show me the benchmarks, but listing a few features and the file sizes of each framework tells me absolutely nothing useful.