[Methodology]
I used movie recording software with a time stamp recording option. After the recording, I reviewed the movie frame by frame.

Software:
AmaRecCo (one of the most popular videogame movie recording software in Japan)
Settings:
Framerate 60Hz, AMV3 codec, Timestamp active

* Time stamp accuracy: According to my WoW raiding experience, the timestamp of amarecco completely corresponds to the timestamp of the raw combat log (wow combatlog timestamp resolution is 10-millisecond).