perfetto-ui: Add timespan selection A timespan can be selected by holding shift and dragging with the mouse. The time of the selection is shown in a panel above the tracks. Bug:118900982 Change-Id: Id79b7d4c5370e1e2ceda026489b3dd69489cf813
Perfetto is an open-source project for performance instrumentation and tracing of Linux/Android/Chrome platforms and user-space apps.
See www.perfetto.dev for docs.