Some kernels do a lot of processing on start so appear to be slow to start running cells

[greazer]

I have a kernel on my Windows machine that I installed the deep learning keras api into. Keras seems to require some startup code to be run when the environment is activated. At minimum this takes a few seconds, even when activating from an anaconda prompt.

Within VS Code, it also takes a long time. Therefore, when I run the first cell for this environment, it appears to start very slowly.

Since we cannot speed up a process we have no control over, at minimum, it would help if the notification that tells me a kernel is starting, that it provides a link to the Jupyter output panel so I can see what's happening.

Here's a log with delays highlighted. This one took 26 seconds to start. I've seen it start slower than that though.

Info 2021-10-16 08:38:47: Execute Cells request 1 1
Info 2021-10-16 08:38:47: Execute Cell 1 file:///c%3A/Users/jimg/Repos/covid-19-data-1/SampleNbsAndScripts/myanalysis_plotly.ipynb
*******
DELAY 8 seconds. 
*******
Info 2021-10-16 08:38:55: Process Execution: > ~\anaconda3\envs\myenv\python.exe -c "import ipykernel"
> ~\anaconda3\envs\myenv\python.exe -c "import ipykernel"
Info 2021-10-16 08:38:55: Process Execution: > ~\anaconda3\envs\myenv\python.exe -c "import jupyter"
> ~\anaconda3\envs\myenv\python.exe -c "import jupyter"
Info 2021-10-16 08:38:55: Process Execution: > ~\anaconda3\envs\myenv\python.exe -c "import notebook"
> ~\anaconda3\envs\myenv\python.exe -c "import notebook"
Info 2021-10-16 08:38:55: Process Execution: > ~\anaconda3\envs\myenv\python.exe -m pip list
> ~\anaconda3\envs\myenv\python.exe -m pip list
Info 2021-10-16 08:38:56: Process Execution: > ~\anaconda3\envs\myenv\python.exe -m jupyter kernelspec --version
> ~\anaconda3\envs\myenv\python.exe -m jupyter kernelspec --version
Info 2021-10-16 08:38:56: Install Missing Dependencies, Class name = S, completed in 31169ms, has a falsy return value, Return Value: undefined
Info 2021-10-16 08:38:56: Kernel launching with ports 9000,9001,9002,9003,9004. Start port is 9000
Info 2021-10-16 08:38:56: Launching kernel daemon for Python 3.7.10 64-bit ('myenv': conda) # C:\Users\jimg\anaconda3\envs\myenv\python.exe
*******
DELAY 13 seconds
*******
Info 2021-10-16 08:39:09: Creating daemon process for C:\Users\jimg\anaconda3\envs\myenv\python.exe with env variables count 127
Info 2021-10-16 08:39:09: Process Execution: > ~\anaconda3\envs\myenv\python.exe -m vscode_datascience_helpers.daemon --daemon-module=vscode_datascience_helpers.kernel_launcher_daemon -v
> ~\anaconda3\envs\myenv\python.exe -m vscode_datascience_helpers.daemon --daemon-module=vscode_datascience_helpers.kernel_launcher_daemon -v
Info 2021-10-16 08:39:09: Starting kernel from scratch with options {"env":{"ALLUSERSPROFILE":"C:\\ProgramData","AML_EXTENSION_SHOWRUNS":"1","APPDATA":"C:\\Users\\jimg\\AppData\\Roaming","APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL":"true","CHROME_CRASHPAD_PIPE_NAME":"\\\\.\\pipe\\crashpad_11488_RLRLBFPIGSFSYZJD","CommonProgramFiles":"C:\\Program Files\\Common Files","CommonProgramFiles(x86)":"C:\\Program Files (x86)\\Common Files","CommonProgramW6432":"C:\\Program Files\\Common Files","COMPUTERNAME":"SURFACESTUDIO","ComSpec":"C:\\WINDOWS\\system32\\cmd.exe","CUDA_PATH":"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v11.3","CUDA_PATH_V11_3":"C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v11.3","CUDA_VISIBLE_DEVICES":"-1","DriverData":"C:\\Windows\\System32\\Drivers\\DriverData","ELECTRON_RUN_AS_NODE":"1","FPS_BROWSER_APP_PROFILE_STRING":"Internet Explorer","FPS_BROWSER_USER_PROFILE_STRING":"Default","GIT_LFS_PATH":"C:\\Program Files\\Git 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Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Execute rpc method exec_module in DS Daemon
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Execute rpc method exec_module from C:\Users\jimg\anaconda3\envs\myenv\python.exe
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Exec module in DS Kernel Launcher Daemon ipykernel_launcher with args ['--ip=127.0.0.1', '--stdin=9003', '--control=9001', '--hb=9000', '--Session.signature_scheme="hmac-sha256"', '--Session.key=b"1fd81654-1765-4d51-b71e-fe266761a250"', '--shell=9002', '--transport="tcp"', '--iopub=9004', '--f=C:\\Users\\jimg\\AppData\\Local\\Temp\\tmp-23880xgcMwuHZFyEa.json']
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Exec in DS Kernel Launcher Daemon (observable) ipykernel_launcher with args ['--ip=127.0.0.1', '--stdin=9003', '--control=9001', '--hb=9000', '--Session.signature_scheme="hmac-sha256"', '--Session.key=b"1fd81654-1765-4d51-b71e-fe266761a250"', '--shell=9002', '--transport="tcp"', '--iopub=9004', '--f=C:\\Users\\jimg\\AppData\\Local\\Temp\\tmp-23880xgcMwuHZFyEa.json']
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Exec in DS Kernel Launcher Daemon (observable) ['C:\\Users\\jimg\\anaconda3\\envs\\myenv\\python.exe', '-m', 'ipykernel_launcher', '--ip=127.0.0.1', '--stdin=9003', '--control=9001', '--hb=9000', '--Session.signature_scheme="hmac-sha256"', '--Session.key=b"1fd81654-1765-4d51-b71e-fe266761a250"', '--shell=9002', '--transport="tcp"', '--iopub=9004', '--f=C:\\Users\\jimg\\AppData\\Local\\Temp\\tmp-23880xgcMwuHZFyEa.json']
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Exec in DS Kernel Launcher Daemon (observable)
Info 2021-10-16 08:39:09: Python Daemon (pid: 5072): Kernel launched, with PID 23016
Warn 2021-10-16 08:39:09: Python Daemon (pid: 5072): Waiting for Kernel to die 23016
Info 2021-10-16 08:39:09: Launching kernel daemon, Class name = p, completed in 12653ms, has a truthy return value, Arg 1: <Uri:c:\Users\jimg\Repos\covid-19-data-1\SampleNbsAndScripts\myanalysis_plotly.ipynb>, Arg 2: "c:\\Users\\jimg\\Repos\\covid-19-data-1\\SampleNbsAndScripts", Arg 3: {"specFile":"C:\\Users\\jimg\\AppData\\Roaming\\jupyter\\kernels\\python3710jvsc74a57bd0b6d63190ba476f8db41d311553a07f932cc12a9b15fd1bbb24bb6575d9c2bce1\\kernel.json","interpreterPath":"C:\\Users\\jimg\\anaconda3\\envs\\myenv\\python.exe","name":"python3710jvsc74a57bd0b6d63190ba476f8db41d311553a07f932cc12a9b15fd1bbb24bb6575d9c2bce1","argv":["python","-m","ipykernel_launcher","--ip=127.0.0.1","--stdin=9003","--control=9001","--hb=9000","--Session.signature_scheme=\"hmac-sha256\"","--Session.key=b\"1fd81654-1765-4d51-b71e-fe266761a250\"","--shell=9002","--transport=\"tcp\"","--iopub=9004","--f=C:\\Users\\jimg\\AppData\\Local\\Temp\\tmp-23880xgcMwuHZFyEa.json"],"language":"python","path":"python","display_name":"Python 3.7.10 64-bit ('myenv': conda)","metadata":{"interpreter":{"sysPrefix":"C:\\Users\\jimg\\anaconda3\\envs\\myenv","envType":"Conda","envName":"myenv","envPath":"C:\\Users\\jimg\\anaconda3\\envs\\myenv","path":"C:\\Users\\jimg\\anaconda3\\envs\\myenv\\python.exe","architecture":3,"sysVersion":"3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 15:37:01) [MSC v.1916 64 bit (AMD64)]","version":{"raw":"3.7.10","major":3,"minor":7,"patch":10,"build":[],"prerelease":["final","0"]},"companyDisplayName":"Anaconda, Inc.","displayName":"Python 3.7.10 64-bit ('myenv': conda)"}},"env":{}}, Arg 4: {"sysPrefix":"C:\\Users\\jimg\\anaconda3\\envs\\myenv","envType":"Conda","envName":"myenv","envPath":"C:\\Users\\jimg\\anaconda3\\envs\\myenv","path":"C:\\Users\\jimg\\anaconda3\\envs\\myenv\\python.exe","architecture":3,"sysVersion":"3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 15:37:01) [MSC v.1916 64 bit (AMD64)]","version":{"raw":"3.7.10","major":3,"minor":7,"patch":10,"build":[],"prerelease":["final","0"]},"companyDisplayName":"Anaconda, Inc.","displayName":"Python 3.7.10 64-bit ('myenv': conda)"}, Return Value: <Return value cannot be serialized for logging>
Info 2021-10-16 08:39:09: Launching kernel in kernelProcess.ts, Class name = y, completed in 12654ms, has a truthy return value, Arg 1: "c:\\Users\\jimg\\Repos\\covid-19-data-1\\SampleNbsAndScripts", Return Value: 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DELAY 3 seconds
*******
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Warn 2021-10-16 08:39:12: Kernel 5072 as possibly died, StdErr from Kernel Process C:\Users\jimg\anaconda3\envs\myenv\lib\site-packages\traitlets\traitlets.py:2205: FutureWarning: Supporting extra quotes around strings is deprecated in traitlets 5.0. You can use 'hmac-sha256' instead of '"hmac-sha256"' if you require traitlets >=5.

Warn 2021-10-16 08:39:12: StdErr from Kernel Process C:\Users\jimg\anaconda3\envs\myenv\lib\site-packages\traitlets\traitlets.py:2205: FutureWarning: Supporting extra quotes around strings is deprecated in traitlets 5.0. You can use 'hmac-sha256' instead of '"hmac-sha256"' if you require traitlets >=5.

Info 2021-10-16 08:39:12: Python Daemon (pid: 5072): write to stderr:   FutureWarning)

Warn 2021-10-16 08:39:12: Kernel 5072 as possibly died, StdErr from Kernel Process   FutureWarning)

Warn 2021-10-16 08:39:12: StdErr from Kernel Process   FutureWarning)

Info 2021-10-16 08:39:12: Python Daemon (pid: 5072): write to stderr: C:\Users\jimg\anaconda3\envs\myenv\lib\site-packages\traitlets\traitlets.py:2160: FutureWarning: Supporting extra quotes around Bytes is deprecated in traitlets 5.0. Use '1fd81654-1765-4d51-b71e-fe266761a250' instead of 'b"1fd81654-1765-4d51-b71e-fe266761a250"'.

Warn 2021-10-16 08:39:12: Kernel 5072 as possibly died, StdErr from Kernel Process C:\Users\jimg\anaconda3\envs\myenv\lib\site-packages\traitlets\traitlets.py:2160: FutureWarning: Supporting extra quotes around Bytes is deprecated in traitlets 5.0. Use '1fd81654-1765-4d51-b71e-fe266761a250' instead of 'b"1fd81654-1765-4d51-b71e-fe266761a250"'.

Warn 2021-10-16 08:39:12: StdErr from Kernel Process C:\Users\jimg\anaconda3\envs\myenv\lib\site-packages\traitlets\traitlets.py:2160: FutureWarning: Supporting extra quotes around Bytes is deprecated in traitlets 5.0. Use '1fd81654-1765-4d51-b71e-fe266761a250' instead of 'b"1fd81654-1765-4d51-b71e-fe266761a250"'.

Info 2021-10-16 08:39:12: Python Daemon (pid: 5072): write to stderr:   FutureWarning)

Warn 2021-10-16 08:39:12: Kernel 5072 as possibly died, StdErr from Kernel Process   FutureWarning)

Warn 2021-10-16 08:39:12: StdErr from Kernel Process   FutureWarning)

Info 2021-10-16 08:39:12: Raw session started and connected
Started kernel Python 3.7.10 64-bit ('myenv': conda)
Info 2021-10-16 08:39:12: Finished connecting e6097784-3fac-4d1f-a6af-ae62fa003db2
Info 2021-10-16 08:39:12: Updating preferred kernel for remote notebook 25809248-e290-450c-a122-fd389763ff2e
Info 2021-10-16 08:39:12: Preferred kernel for file:///c%3A/Users/jimg/Repos/covid-19-data-1/SampleNbsAndScripts/myanalysis_plotly.ipynb is 25809248-e290-450c-a122-fd389763ff2e
Info 2021-10-16 08:39:12: UpdateWorkingDirectoryAndPath in Kernel
Info 2021-10-16 08:39:12: changeDirectoryIfPossible
Info 2021-10-16 08:39:12: Waiting for idle on (kernel): 25809248-e290-450c-a122-fd389763ff2e -> idle
Info 2021-10-16 08:39:12: Finished waiting for idle on (kernel): 25809248-e290-450c-a122-fd389763ff2e -> idle
Info 2021-10-16 08:39:12: Process Execution: > ~\anaconda3\envs\myenv\python.exe -m pip list
> ~\anaconda3\envs\myenv\python.exe -m pip list
Info 2021-10-16 08:39:13: Registering dummy command feature

[DonJayamanne]

Since we cannot speed up a process we have no control over

I believe we can improve it:
#6694
#7903
#5324

[DonJayamanne]

Testing

• Covered here Caching for improvements in kernel startup #6702

[rchiodo]

To be clear, there no new UI showing what's taking so long. Don just made it not take so dang long :)