This is the worst (performance-wise) version control software I can imagine. Yes, afaik worse than commomly used blockchains and Darcs. The primary functionality is "merging" parallel event branches, and that is slow (O(n²) where n is the number of parallel branches).
This also means that this can be only used on really small datasets, and because of that, I made the library simpler by requiring that the data set is completely present in memory while working on it (as in: no file system access while modifying it).