Summary:
The document collecting new user info
(https://docs.getgrist.com/doc/GristNewUserInfo) got very slow, taking 40+
seconds for cold open. Sign-up submissions had to wait this time to proceed to
next step, because they waited for the write to this doc, which was blocked on
the Calculate action to complete.
Two changes were made: one to remove all expensive columns and summaries in the
actual doc, so the doc is back to opening in single seconds, and times should
be acceptable now.
The second change is this diff: to avoid waiting for the write step, so that it
doesn't affect users even if it gets slow again.
Test Plan: Existing test continues to work with a minor reliability tweak.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D3103
c5db65d1d2