fix(performance): Implemented performance improvements including improvements suggested by @briochh (#1092)

[spaulins-usgs]

No description provided.

[codecov]

Codecov Report

Merging #1097 (b43c254) into develop (801a417) will increase coverage by 0.011%.
The diff coverage is 93.220%.

❗ Current head b43c254 differs from pull request most recent head a3dfc37. Consider uploading reports for the commit a3dfc37 to get more accurate results

@@              Coverage Diff              @@
##           develop     #1097       +/-   ##
=============================================
+ Coverage   71.794%   71.806%   +0.011%     
=============================================
  Files          224       224               
  Lines        51636     51672       +36     
=============================================
+ Hits         37072     37104       +32     
- Misses       14564     14568        +4     

Impacted Files	Coverage Δ
flopy/mf6/data/mfdatascalar.py	57.575% <ø> (ø)
flopy/mf6/data/mffileaccess.py	67.417% <ø> (ø)
flopy/utils/datautil.py	67.472% <90.909%> (+0.071%)	⬆️
flopy/mf6/data/mfdatalist.py	74.305% <92.307%> (+0.140%)	⬆️
flopy/mf6/data/mfdata.py	76.079% <92.857%> (+1.720%)	⬆️
flopy/mf6/coordinates/modelgrid.py	36.842% <100.000%> (+0.222%)	⬆️
flopy/mf6/data/mfdataarray.py	65.981% <100.000%> (ø)
flopy/mf6/data/mfdatautil.py	69.230% <100.000%> (-0.189%)	⬇️
flopy/mf6/modflow/mfgwfuzf.py	53.947% <0.000%> (-0.720%)	⬇️