This is interesting, thanks for sharing. Anyway I find it really nice to use Redis, it's very easy to build a custom graph on it. Btw, the bloom filter conversation is about how clients can use the results of these graphs that run on service providers, without re-doing the work. No matter the graph you use, you still have to download many thousands events per day, parse the JSON, check the signatures... Just not something you want to do on a phone, unless you are into watching your battery level go down in real time