At the moment, the Wikibase dumpRdf.php script produces TTL that should be piped through the Munge script before getting loaded into WDQS.
The Munge script removes some triples for better performance and splits the TTL into smaller chunks before being loaded into Blazegraph.
This step could be skipped if dumpRdf.php had an option to write TTL already in the optimized format, and optionally export a series of files instead of just one.