How to run postgres in-memory on windows and sync to FS when a temer runs out?

So Progress is slow for me (in terms of query and update times) on SSD and it is ok in my case: I use it as a mix of Graph database + Table processor + NoSQL JSON trees so lots of loops, graphs, trees,... Yet my data is not so large - it all can fit into RAM 3 times. So I want to speed Postgres up - have it all run in RAM and sync to SSD/HDD once in N minutes. In my dream world, it would save\update only the diff between the current snapshot and the previous one. Is it possible to configure Postgres to do such a thing?