Unused item management

摘要: Items that are in use maintained a used item store. no longer placed an unused items When is not currently requested again, attempt made to retrieve the from Retrieving store can save tremendous amount of time since object does need be recalculated again when it requested. may evicted based on system resources available. has been determined item(s) should evicted, eviction score calculated for each item. then their score. Generally larger size, took less calculate, have accessed as frequently, and referenced recently, first ones