some fixes

python_app/hardware_full/librevna_driver/transport/usb.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 from contextlib import suppress
 import logging
 import threading
+import time
 from typing import Callable
 
 from ..exceptions import DeviceDisconnectedError, TimeoutError
@@ -44,6 +45,10 @@ class USBTransport:
         self._rx_thread: threading.Thread | None = None
         self._stop_event = threading.Event()
         self._tx_lock = threading.Lock()
+        # Aggregation window for the RX debug trace (see `_rx_loop`).
+        self._rx_debug_bytes = 0
+        self._rx_debug_chunks = 0
+        self._rx_debug_window_start = 0.0
 
         self.connected_serial: str | None = None
 
@@ -270,7 +275,27 @@ class USBTransport:
 
             if data:
                 if logger.isEnabledFor(logging.DEBUG):
-                    logger.debug("USB RX %d bytes", len(data))
+                    # Aggregate: the free-running datapoint stream completes bulk
+                    # reads hundreds of times per second, and a log record per chunk
+                    # floods every handler (file, stderr, and the GUI panel, which
+                    # marshals each record onto the GUI thread). One summary per
+                    # second keeps the throughput trace without the flood.
+                    self._rx_debug_bytes += len(data)
+                    self._rx_debug_chunks += 1
+                    now = time.monotonic()
+                    if self._rx_debug_window_start == 0.0:
+                        self._rx_debug_window_start = now
+                    elif now - self._rx_debug_window_start >= 1.0:
+                        logger.debug(
+                            "USB RX %d bytes in %d chunks over %.2f s (serial=%s)",
+                            self._rx_debug_bytes,
+                            self._rx_debug_chunks,
+                            now - self._rx_debug_window_start,
+                            self.connected_serial,
+                        )
+                        self._rx_debug_bytes = 0
+                        self._rx_debug_chunks = 0
+                        self._rx_debug_window_start = now
                 self._on_data(bytes(data))
         logger.debug("USB RX thread stopped")