When importing a file, the preview features used to display data in the import wizard were not being removed from the parser config. They are now cleaned up when import finishes (complete or cancel).
The RBush mixin was holding references to features in the module-scoped featureSets array. That array is recreated on each call, and references are no longer needed when the call completes. The array is now cleared once the result set has been determined to avoid retaining features in memory.
featureSetsarray. That array is recreated on each call, and references are no longer needed when the call completes. The array is now cleared once the result set has been determined to avoid retaining features in memory.Fixes #1039.