[yt-dev] Pre-YTEP: remove caching of datasets

[Nathan Goldbaum]

On Fri, Sep 25, 2015 at 12:55 PM, Matthew Turk <matthewturk at gmail.com>
wrote:

> Hi all,
>
> Before I get too far into writing up a YTEP, I wanted to know if
> anyone would object to disabling "caching" of datasets in-memory.
>
> Right now, if you do:
>
> ds1 = yt.load("something")
> ds2 = yt.load("something")
>
> "ds1 is ds2" will return True; this was done so that you could load a
> dataset, then unpickle an object with a reference to that dataset, and
> get the dataset back rather than a newly-loaded one.  But I think a)
> folks don't pickle much b) it causes a lot of problems.  So I'm
> wondering if it would be okay to just turn this off.
>

Big +1 to this. It's been the cause of a number of head-scratchers for me.
It also motivated the parts of this change that touch domain_left_edge and
domain_right_edge, which is IMO a bit silly but necessary given the way the
caching works:

https://bitbucket.org/ngoldbaum/yt/commits/dd8d2317489904eb14b24cb63d7e8cfd0e32541f


>
> -Matt
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