Hi all, My app has to use rather large amounts of static data in order to run. I have been using an SQLite database to hold this data so far. The largest chunk of data was a table with roughly 80k records. I only make use of this table to see if a particular key is present. Reading RWH over from time to time I came accross the Bloom Filter and finally realized that this would be a much better solution. So I could insert all the keys in the table into a suitable bloom filter instead and the just query the bloom filter instead of the database. I haven't figured out yet how to write a "literal" representation of the "filled" bloom filter yet though and could do with some tipps. I'm using the bloomfilter package from hackage. Günther