val redundantOpCompactThreshold = 2000
    return redundantOpCount >= redundantOpCompactThreshold &&
      redundantOpCount >= lruEntries.size
  }

  /**
   * Drops the entry for [key] if it exists and can be removed. If the entry for [key] is currently
   * being edited, that edit will complete normally but its value will not be stored.
   *
   * @return true if an entry was removed.