skylines-project/skylines — pull request #92 by Turbo87 (2013-06-17 20:23:57+00:00)
Title: model.flight_phase: Use Float instead of Numeric

Numeric has far worse performance characteristics and the table size
decreases from 95 MB to 87 MB after this patch.

as @TobiasLohner pointed out in https://github.com/skylines-project/skylines/pull/90#issuecomment-19497824