New issue 944: Slices of fields that need ghost zones are slow for patch AMR data https://bitbucket.org/yt_analysis/yt/issue/944/slices-of-fields-that-need-gh...

Nathan Goldbaum:

On my laptop, the following script:

``` #!python

import yt import time

def test(field): slc = yt.SlicePlot(ds, 2, field)

if __name__ == "__main__": ds = yt.load("GasSloshing/sloshing_nomag2_hdf5_plt_cnt_0150") ds.periodicity = (True, True, True)

setup = "from __main__ import test"

t0 = time.time() test('density') tden = time.time() - t0

t0 = time.time() test('velocity_divergence') tdiv = time.time() - t0

print tden, tdiv ```

shows that it takes about 3.5 seconds to do the density slice and 63 seconds to do the velocity_divergence slice.