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cc @aem - another possible approach to #95

Avoids duplicate deref calculations in useStoreDependency. Only calculate the value once; use it to initialize state (if needed) and as the new value.

When the value changes, two deref calculations will still run:

  1. initial render/hook call
  2. re-render/hook call triggered by setting the new value in state

TODOs

  • linter, checker, and test are passing
  • any new public modules are exported from src/GeneralStore.js
  • version numbers are up to date in package.json
  • CHANGELOG.md is up to date

See HubSpot#95

Avoids duplicate deref calculations in `useStoreDependency`. Only
calculate once; use this result to initialize state (if necessary)
and as the next state.

When the value changes, two deref calculations will still run:

1. the initial render/hook call
2. the re-render/hook call triggered by setting the new value in state
@gmcnaughton gmcnaughton force-pushed the gcm/minimize-deref-calls branch from d963af0 to 06f93dd Compare March 15, 2021 13:47
@aem aem merged commit 9a190d4 into HubSpot:master Mar 15, 2021
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2 participants