Module bandwidth_loop 

Shared bandwidth measurement loop for download/upload tests.

Eliminates duplication between download.rs and upload.rs by providing:

• LoopState — unified state for throttled speed sampling, peak tracking, progress bar updates, and atomic byte counting
• run_concurrent_streams — shared spawn/collect/report pattern that both download and upload tests delegate to

Each I/O operation (download chunk, upload round) calls record_bytes() to update shared state. Call finish() at the end to compute final results.

Structs

BandwidthResult

Final result from a bandwidth test.

LoopState

Shared state for a bandwidth test (download or upload).

Constants

SAMPLE_INTERVAL_MS

Throttle interval for speed sampling (20 Hz max).

Functions

run_concurrent_streams

Run a bandwidth test using multiple concurrent streams.