Hi,
The addition of DataFrames as objects that can be viewed (and edited) in 
Spyder's Variable Explorer is a fantastic development. Viewing data is 
extremely important in serious data analysis and related debugging. With 
this addition Spyder approaches the convenience and workability of 
dedicated, mature statistical packages such as Stata -- all with the 
performance and malleability of python. In my view, a true game changer.

Now, I have noticed that the feature does not work well (yet) on large data 
sets. On my system (python 3.4, 8 Go RAM), attempting to use the Variable 
Explorer with a df with more than say 100,000 rows freezes Spyder 
altogether. More work is needed is optimize viewing (load rows/columns only 
as they are viewed, or a similar strategy?). Also, I would like to suggest 
that viewing is much more important than editing -- in case it helps to 
optimize the feature? Editing data through a browser is not something you 
normally do - viewing data on the other hand, you do all the time. 

Again congratulations on this, I truly believe that this is important for 
the python data analysis community.



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