I am considering hiring someone to implement GPU processing in Postgres to speed up sequential scans on a database located on a ramdisk. How much do you believe I could gain using this approach? I could buy any type of graphic card. I know that this question is really hard, but I know very little about GPU, so a very rough guess would help me a lot.
EDIT: Even though I my interest is specifically for Postgres, I could ask this question in a different way: "How large is the potential performance increase by using GPU for sequential scans on an in-memory database". If the answer is that it has a potential of 10-50 times the performance, then I can start investigating more specifically if this could be realized also in Postgres.