Import perf improvement

[akhenry]

Closes #7612

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Author Checklist

• Changes address original issue?
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Reviewer Checklist

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes are missing coverage. Please review.

Project coverage is 59.95%. Comparing base (4027eae) to head (5f999c0).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7604      +/-   ##
==========================================
+ Coverage   56.46%   59.95%   +3.48%     
==========================================
  Files         672      430     -242     
  Lines       27112    13472   -13640     
  Branches     2635        0    -2635     
==========================================
- Hits        15310     8077    -7233     
+ Misses      11477     5395    -6082     
+ Partials      325        0     -325     

Flag	Coverage Δ
e2e-full	23.57% <0.00%> (-18.15%)	⬇️
e2e-stable	59.86% <0.00%> (-0.08%)	⬇️
unit	?

Files	Coverage Δ
...ugins/importFromJSONAction/ImportFromJSONAction.js	14.54% <0.00%> (-50.72%)	⬇️

... and 376 files with indirect coverage changes

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