This is something we've built a search command to do in the Splunk App for Transaction Profiling. Look in the menu for Samples -> Steps. The current version on Splunkbase, Preview 2, still requires you to identify each segment; but we're looking at ways to more generally define when a new segment starts.
Esp, the product team would like to engage with you offline. Can you please email firstname.lastname@example.org?
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