# Method Yabu.LookupDB()->create()

Method create

  `Yabu.LookupDB Yabu.LookupDB(string dir, string mode, mapping|void options)`

Description

  Construct a new lookup table.

  The options, if present, can be used to specify the index hash size. The bigger that number is, the less memory will be used given a certain number of actual keys. In general, using the expected number of entries in the database divided by 100-1000 is reasonable.

  The supported options are

  `index_size : int(1..)`