A small update on the results from yesterday. I suspected the stream level protocol we use to be a bit inefficient, so I implemented a IMHO more efficient version. In short I omit doing a 4-byte read and write call to indicate a block of data is done. I now communicate this by misusing a bit somewhere. I hoped for the result to be a bit better, but I won't complain on MonetDB 4: a rough 30% win on the DBTestI case. Since this change first has to be ported into MonetDB/Five those results will be made available later. The 'new' results are marked as M4n. The results follow in the table below: PG8 My4 M4p M4n M5p M5n JDBC local - DBTestI 37s 27s 86s 62s 60s ??s - DBTest 19s 27s 59s 48s 46s ??s - DBTestP 14s 27s 64s 61s 60s ??s