Lucene is the typical example of software that works well despite not being as fast as possible, because its features are more important than raw speed that C c

Lucene is the typical example of software that works well despite not being as fast as possible, because its features are more important than raw speed that C could provide. Nothing wrong about that. After all, that's why we buy more hardware. However, it doesn't disprove the point of the article. It could be possible to build something at much better speed than Lucene if there was the interest and man power to do that in C.