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[ASRangeController] Minimize number of registrations to node display notifications #1864
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Previously,
ASRangeController
registers to notification center every time a range update is performed, regardless of the number of nodes that need to schedule for a recursive display in response to the update.Instead, if this number is taken into account and range controller doesn't observe further notifications if it is zero, we can minimize the number of range updates executed and may fix #1460 (verification needed though).