[Discussion] Slice uploaded data by default to visible threads/time

Aka: WYSIWY-Upload.

Match users expectations by only uploading what you see.

[mstange]

It depends how far we want to take it. Filtering out hidden threads is easy. Filtering visible threads to the visible range is a bit more tricky, depending on how fare we want to take it. We can just filter out the out-of-range samples, or we can blank out strings from the string table that are not needed for any funcs for frames for stacks in the in-range samples, or we can start culling things from the func / frame / stack table. But if we do that, the transforms in the URL will be wrong. So I would suggest keeping the shapes of our tables and just blanking out strings in the string table.

[gregtatum]

This is resolved with the MVP of the PII work in #1802, and follow-ups are filed under the privacy label.