Certain techniques are disclosed for sequentially analyzing a series of thread dump samples to estimate the intensity statistics of newly classified stack segments of stack frames. Embodiments can detect a branch point along one or more linearly connected stack frames of a stack segment, where the stack segment is associated with a filter state. Upon detecting the branch point along the one or more linearly connected stack frames of the stack segment, some embodiments can split the stack segment into a plurality of new stack segments that each include a subset of the stack frames, where the plurality of new stack segments are referenced by the stack segment. Embodiments can then initialize a filter state for each of the new stack segments based at least in part on the filter state of the stack segment.
