pub fn new(basedir: PathBuf) -> Self {
        Keystore {
            basedir: basedir.clone(),
            setup_data_path: basedir,
            #[cfg(feature = "gpu")]
            setup_data_cache_proof_compressor: Arc::new(CompressorSetupData::new()),
        }
    }
Base-dir is the location of smaller keys (like verification keys and finalization hints).
Setup data path is used for the large setup keys.
prover/crates/lib/keystore/src/keystore.rs