@per1234

Describe the bug

🐛 The rate of the output from the upload tool shown when verbose upload output is enabled in the preferences is very slow.

There seems to be some significant bottleneck in the communication stream between the tool and the Pro IDE's output pane.

To Reproduce

1. Select File > Preferences from the Arduino IDE menus.
2. Check the box next to "Show verbose output during: upload"
3. Click the OK button.
4. Upload a sketch to an AVR board, megaAVR board (upload tool is AVRDUDE), or the "Programming Port" of a Zero (upload tool is OpenOCD).
   For some reason, I don't have the problem when uploading to a board that uses bossac as the upload tool (e.g., the "Native Serial" port of the Zero).

🐛 The output from the upload tool slowly streams in to the output pane for seconds after the actual upload has finished.

Expected behavior

The upload tool output to be displayed in the output pane at approximately the same speed as when using it from the command line.

Desktop

Original report

• OS: Windows 10
• Version: 0.1.4-snapshot.3042c1a
  Date: 2021年02月08日T10:04:20.854Z
  CLI Version: 0.15.1 alpha [c7403ed2]

Last verified with

• OS: Windows 10, Ubuntu 20.04
• Version: 2.0.0-rc7

Additional context

I don't have any problems with the rate of the compilation output.

Related

• Indexing/building performance issues #714 (comment)