Will 51 statistics code make the website very slow?

My blog has been using 51la's statistics since its official launch, and to be honest, it's very convenient. While using 51 Statistics, I also added Webmaster Statistics and Google Analytics to my blog at the same time. However, I basically don't look at the latter two. The data presentation of Webmaster Statistics is not conducive to quick information retrieval, and Google Analytics has incomplete statistics and is also very slow. 51la doesn't have these problems, the statistics are very fast, I would say swift. Therefore, I generally just check the data from 51 Statistics.