SciTools/iris — pull request #331 by rhattersley (2013-01-28 10:50:33+00:00)
Title: Defer format-specific imports

Removes the need for the `iris.fileformats` module to import the various format modules on initialisation ... with the main benefit being that `import iris` no longer imports any of the format modules. This gives a small boost to the start-up speed: 0.83s -> 0.79s.