[JacobiX]

After reading the comments and the blog post, I think that the requirements boils down to fast persistence to disk, minimum dependencies and fast test-runs. Fortunately the data is very small 150MB and it fits very easily in memory. According to the post the data changes often so they need to write the data many times in a second. But I'm not sure why do they need to flush every time the entire 150MB ? Why not structure the files/indexes such that we write only the modified data ?