Abstract: Initial items can be partitioned into a plurality of partitions. The partitions can be stored in a partitioned list in computer storage. An index to the partitions can be generated. One or more initial items can be invalidated, and additional items can be appended to the partitioned list in a storage space previously occupied by the invalidated initial items. The index can be updated to omit references to the invalidated items, and to include references to the additional items. Also, a slice of an application call tree can be generated from a partition loaded into memory from a log. A representation of the slice can be displayed on a computer display, even before the entire application call tree is generated from the log.

Abstract: Initial items can be partitioned into a plurality of partitions. The partitions can be stored in a partitioned list in computer storage. An index to the partitions can be generated. One or more initial items can be invalidated, and additional items can be appended to the partitioned list in a storage space previously occupied by the invalidated initial items. The index can be updated to omit references to the invalidated items, and to include references to the additional items. Also, a slice of an application call tree can be generated from a partition loaded into memory from a log. A representation of the slice can be displayed on a computer display, even before the entire application call tree is generated from the log.