orchard 0.15.5 in WebAssembly, single thread (one section uses several Web Workers), synthetic data. It requests only its own files from this site, sends nothing anywhere, collects nothing and uses no vault. Results are shown below and copied by you.
10,000 synthetic compact actions, one thread. Not a sync time and not WebZjs: no download, no database, no witnesses. Uses Runs.
2. Scan: decryption over K Web Workers
The same 10,000 actions split over K workers (message passing, no shared memory, no COOP/COEP; not wasm threads). Uses Runs and K.
3. Proving
One Action-circuit proof, actions = max(2, Outputs). Takes from ~40 s on a recent phone to 5+ minutes on a low-end one; the phone gets warm. Uses Runs, Outputs, verify.