nl_tokens: Singly linked - list of updates . When an update is scheduled it is added to the queue of the current fiber and the work - in - progress fiber . The two queues are separate but they share a persistent structure . During reconciliation updates are removed from the work - in - progress fiber but they remain on the current fiber . That ensures that if a work - in - progress is aborted the aborted updates are recovered by cloning from current . The work - in - progress queue is always a subset of the current queue . When the tree is committed the work - in - progress becomes the current .
pl_tokens: function createUpdateQueue ( baseState ) { var queue = { baseState : baseState , expirationTime : NoWork , first : null , last : null , callbackList : null , hasForceUpdate : false , isInitialized : false } ; { <mask> . isProcessing = false ; } return queue ; }