Update: more improvements and debug to ServerProfiler - Added tracking of thread IDs - Only gather main thread marks (have thread races in my lock-free approach, so delaying this till later) - Add tracking of assemblies to which the method belongs - Filter our mscorlib assembly from instrumenting - rewrote code to use ref semantics Still chasing why consecurtive snapshots seem to double-up in size on frames 2-10. Tests: ran a bunch of profile snapshots (next frame) and looked at the output. It works but has above weird behavior.