RE: [Matplotlib-users] date proposal / dropping python2.2 support

[Shin, D. <sd...@em...>]

> I am concerned about the performance and memory hit of using, for
> example, a list of a list of datetime objects rather than a numeric
> array of floats.  In the float representation, you can efficiently
> create a large date range array with, for example, the drange code I
> posted.

Yes. For intensive operations on time series, a list of datetime objects
will
slow overall performance down significantly.
Sometimes, I dream a sort of time array in numarray like string array, or
object array.
It can be implemented by holding a datetime object indicating an epoch
and an array of floating points indicating intervals from the epoch.

Daehyok Shin