In [1]:

    

import iris
import time


    

In [2]:

    

iris.__version__


    

    
Out[2]:





'1.8.1'

In [3]:

    

%%timeit -r 3

url='http://geoport.whoi.edu/thredds/dodsC/coawst_4/use/fmrc/coawst_4_use_best.ncd'
var='sea_water_potential_temperature'

cube = iris.load_cube(url,var)


    

    




/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/cf.py:1040: UserWarning: Ignoring formula terms variable u'h' referenced by data variable u'v' via variable u's_rho': Dimensions (u'eta_rho', u'xi_rho') do not span (u'time', u's_rho', u'eta_v', u'xi_v')
  warnings.warn(msg)
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/cf.py:1040: UserWarning: Ignoring formula terms variable u'zeta' referenced by data variable u'v' via variable u's_rho': Dimensions (u'time', u'eta_rho', u'xi_rho') do not span (u'time', u's_rho', u'eta_v', u'xi_v')
  warnings.warn(msg)
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/cf.py:1040: UserWarning: Ignoring formula terms variable u'h' referenced by data variable u'u' via variable u's_rho': Dimensions (u'eta_rho', u'xi_rho') do not span (u'time', u's_rho', u'eta_u', u'xi_u')
  warnings.warn(msg)
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/cf.py:1040: UserWarning: Ignoring formula terms variable u'zeta' referenced by data variable u'u' via variable u's_rho': Dimensions (u'time', u'eta_rho', u'xi_rho') do not span (u'time', u's_rho', u'eta_u', u'xi_u')
  warnings.warn(msg)
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/_pyke_rules/compiled_krb/fc_rules_cf_fc.py:1395: UserWarning: Gracefully filling 'time' dimension coordinate masked points
  warnings.warn(msg.format(str(cf_coord_var.cf_name)))






    




1 loops, best of 3: 14.6 s per loop






    




/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/netcdf.py:441: UserWarning: Unable to find coordinate for variable u'zeta'
  '{!r}'.format(name))
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/netcdf.py:441: UserWarning: Unable to find coordinate for variable u'h'
  '{!r}'.format(name))
/home/usgs/miniconda/envs/ioos/lib/python2.7/site-packages/iris/fileformats/netcdf.py:558: UserWarning: Unable to construct Ocean s-coordinate, generic form 1 factory due to insufficient source coordinates.
  warnings.warn('{}'.format(e))

In [4]:

    

%%timeit -r 3
url='http://geoport.whoi.edu/thredds/dodsC/coawst_4/use/fmrc/coawst_4_use_best.ncd'
var='sea_water_potential_temperature'
cube = iris.load_raw(url,var)


    

    




1 loops, best of 3: 11.5 s per loop

In [5]:

    

import netCDF4


    

In [6]:

    

%%timeit -r 3
url='http://geoport.whoi.edu/thredds/dodsC/coawst_4/use/fmrc/coawst_4_use_best.ncd'
nc = netCDF4.Dataset(url)
t = nc.variables['temp']
lon = nc.variables['lon_rho']
lat = nc.variables['lat_rho']
tvar = nc.variables['time']
z = nc.variables['s_rho']


    

    




1 loops, best of 3: 3.95 s per loop

In [6]: