private String buildKeyStoreValue(final String mapName,
                                      final int i,
                                      final KeyPrefix key) {
        // pad the values out to make them more realistic in length to see impact on writes
        return LogUtil.message("{}-{}-value{}{}", mapName, key, i, PADDING);
    }
This is meant to be compared to
stroom.pipeline.refdata.store.offheapstore.TestRefDataOffHeapStore#testLookupPerf()
stroom-state/stroom-planb-impl/src/test/java/stroom/planb/impl/db/TestStateLookupImpl.java