astropy/astropy — pull request #2880 by embray (2014-08-20 22:04:34+00:00)
Title: Slight improvement to memory usage for guess

When a reader results in a `Table` object (that is nonetheless invalid) delete the local reference to that `Table` as soon as we don't need it anymore. That will immediately allow memory to be freed up for the next reader(s) to do their parsing.