incremental: lazily create DeferredFragments #4153
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Comparing to #4150, we now annotate the |
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tentative spec changes to go along with this draft implementation PR are at yaacovCR/graphql-spec#3 |
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once we no longer create the deferMap, collectFields also does not need to return the newDeferUsages. we do still return a boolean if defers were encountered to update the context so that buildExecutionPlan will be called; this allows us to still skip |
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@yaacovCR The latest changes of this PR are available on NPM as Also you can depend on latest version built from this PR: |
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@yaacovCR The latest changes of this PR are available on NPM as Also you can depend on latest version built from this PR: |
goal: avoid creating or passing around the deferMap methodology: each DeferredFragmentRecord will be unique for a given deferUsage and creationPath - we annotate the deferUsage with a "depth" property representing the path length in the response for wherever this defer is delivered. - from a given execution group path, we can derive the path for the deferredFragment for a given deferUsage by "rewinding" the execution group path to the depth annotated on the given deferUsage
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depends on #4152
goal:
avoid creating or passing around the deferMap
methodology:
DeferredFragmentRecordwill be unique for a givenDeferUsageand creationPath.DeferUsagewith adepthproperty representing the pathdepthin the response for wherever thisDeferUsageis used.ExecutionGroup, we can derive thepathfor itsDeferredFragmentRecordfrom theDeferUsageand theExecutionGrouppathby "rewinding" theExecutionGrouppathto the depth annotated on the correspondingDeferUsage.note:for performance, we now save the depth of the path on the path elements themselves. this could always be replaced by a call topathToArrayaspath.depth === pathToArray(path).length)