time range filtering

[ahh]

As we know perfetto falls over at some point with large enough traces; can we write a tool that slices our output .ftfs by time range so we can look at parts successfully?

This isn't a good solution but it would be great for usability.

Admittedly it's also a pure Fuschia Format problem as opposed to a magic-trace one but nevertheless there might not be a better place for this to live.

[cgaebel]

Sounds good to me. I guess we shouldn't call it slice-and-dice.