Great post, Felix! Very well said.
What does this mean? It means that jQuery is nowhere as slow as the final test results make it appear (26x slower then mootools). It means that mootools got the performance lead in some specific selector (and does good in general) which is given way too much "weight" by the test itself. I'm also questioning how far one can even go in terms of benchmarking selector engines. I mean everybody has different needs. Most of the time I use very simple selectors which jQuery does very fast according to the test. So I'd actually be willing to loose performance on the more complicated selectors if that allows the more common ones to run faster. What's missing in my eyes is a survey or analysis of common selector usage that could be used to weigh in the different selector results.
