Shift-enter causes comically slow code-send to terminal

Environment data

• VS Code version: 1.48.0
• Extension version (available under the Extensions sidebar): 2020.8.101144
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.7.6 64-bit (‘base’: conda)
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: Pylance

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

When I press shift-enter, code is sent to the terminal lickety split.

Actual behaviour

We’re partying like it’s 1989, with 1200 baud modems:

Steps to reproduce:

1. Write a long line of code.
2. With the cursor in the long line of code you just wrote, press shift-enter.
3. Have a sad, like sad cat, while waiting on the code to get to the terminal window.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

User belongs to experiment group 'ShowPlayIcon - start'
User belongs to experiment group 'ShowExtensionSurveyPrompt - enabled'
User belongs to experiment group 'DebugAdapterFactory - experiment'
User belongs to experiment group 'PtvsdWheels37 - experiment'
User belongs to experiment group 'UseTerminalToGetActivatedEnvVars - control'
User belongs to experiment group 'LocalZMQKernel - experiment'
User belongs to experiment group 'CollectLSRequestTiming - experiment'
User belongs to experiment group 'CollectNodeLSRequestTiming - experiment'
User belongs to experiment group 'EnableIPyWidgets - experiment'
User belongs to experiment group 'RunByLine - experiment'
User belongs to experiment group 'CustomEditorSupport - control'
User belongs to experiment group 'pythonaacf'
> conda --version
> pyenv root
> python3.7 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python3.6 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python3 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python2 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> python c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3.7 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3.6 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -3 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
> py -2 c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import sys;print(sys.executable)"
Starting Pylance language server.
Error 2020-08-18 18:27:46: Detection of Python Interpreter for Command py and args -3.6 failed as file Python 3.6 not found!

 -3.8-32
 -3.7-64 does not exist
Error 2020-08-18 18:27:46: Detection of Python Interpreter for Command py and args -2 failed as file Python 2 not found!

 -3.8-32
 -3.7-64 does not exist
> ~\Anaconda3\Scripts\conda.exe info --json
> ~\Anaconda3\Scripts\conda.exe info --json
> ~\Anaconda3\Scripts\conda.exe info --json
> ~\Anaconda3\Scripts\conda.exe info --json
Python interpreter path: ~\Anaconda3\python.exe
> ~\Anaconda3\Scripts\conda.exe env list
> ~\Anaconda3\Scripts\conda.exe info --json
> ~\Anaconda3\Scripts\conda.exe env list
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import notebook"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py -c "import jupyter"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py jupyter kernelspec --version
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "import urllib.request, json, smtplib, ssl"
> ~\Anaconda3\Scripts\conda.exe info --json
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py pip --version
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "import urllib.request, json, smtplib, ssl"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "from email.mime.text import MIMEText"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "from email.mime.multipart import MIMEMultipart"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py campsite_url = "https://www.recreation.gov/api/camps/availability/campground/234685/month?start_date=2020-08-01T00%3A00%3A00.000Z"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "url = urllib.request.urlopen(campsite_url)"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "campsites = json.loads(url.read().decode())"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py asdasda
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "url = urllib.request.urlopen(campsite_url)
campsites = json.loads(url.read().decode())
asdasda
asdas
"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py sender_email = "[e-mail]"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py receiver_email = "[e-mail]"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py password = "[nice try; I removed it]"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py email_subject = ""
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "message = MIMEMultipart("alternative")"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "message["From"] = sender_email"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "message["To"] = receiver_email"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "email_body_html = ''"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "email_body_plain = ''"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "not_available_strings = ['Reserved', 'Not Available']"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py "for key in campsites['campsites']:
    if(campsites['campsites'][key]['availabilities']['2020-08-29T00:00:00Z'] not in not_available_strings and
       campsites['campsites'][key]['availabilities']['2020-08-30T00:00:00Z'] not in not_available_strings):
        email_body_html += '<p>Found a campsite! <a href="https://www.recreation.gov/camping/campsites/' + str(key) + '">check this</a></p>\n'
        email_body_plain += 'site' + key + ' has availability '
        email_subject = "Campsite check: CAMPSITE FOUND"
"
> ~\Anaconda3\python.exe c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\pyvsc-run-isolated.py c:\Users\[username]\.vscode\extensions\ms-python.python-2020.8.101144\pythonFiles\normalizeForInterpreter.py for key in campsites['campsites']:
    if(campsites['campsites'][key]['availabilities']['2020-08-29T00:00:00Z'] not in not_available_strings and
       campsites['campsites'][key]['availabilities']['2020-08-30T00:00:00Z'] not in not_available_strings):
        email_body_html += '<p>Found a campsite! <a href="https://www.recreation.gov/camping/campsites/' + str(key) + '">check this</a></p>\n'
        email_body_plain += 'site' + key + ' has availability '
        email_subject = "Campsite check: CAMPSITE FOUND"

[meganrogge]

resolved @arencambre

[arencambre]

It is reported as microsoft/vscode#112346, then it got closed as being a duplicate of itself. 🤣