An experimental tool that reads in the rows from state_groups_state and state_group_edges tables for a particular room and calculates the changes that could be made that (hopefully) will signifcantly reduce the number of rows.

This tool currently does not write to the database in any way, so should be safe to run.

Example

$ cargo run --release -- -p "postgresql://localhost/synapse" -r '!some_room:example.com'
   Compiling rust-synapse-compress-state v0.1.0 (file:///home/erikj/git/rust-synapse-compress-state)
    Finished release [optimized] target(s) in 2.39s
     Running `target/release/rust-synapse-compress-state -p 'postgresql://localhost/synapse' -r '!some_room:example.com'`
Missing 11 state groups
Number of entries: 25694
Number of rows: 356650
Number of rows compressed: 41068
New state map matches old one