Several strange behaviors on Windows

[miechoo]

On Windows 11 with Jupyter Version: 7.2.1 and cell running Java code.

In my scenario I used sleep function for 10s.

Unexpected behavior: the counter starts counting from some non zero position.

Unexpected behavior: when script ends, the value is "0ms".

[krassowski]

• What version of this extension do you have installed?
• Can you share the timing metadata of these cells?

[miechoo]

jupyterlab-execute-time 3.1.2
how can I get the timing metadata?

[krassowski]

You can open the notebook using text editor, or use the Property inspector in the sidebar

[miechoo]

cell metadata:

{
    "execution": {
        "iopub.status.busy": "2024-08-09T14:43+0000",
        "iopub.execute_input": "2024-08-09T14:43+0000",
        "iopub.status.idle": "2024-08-09T14:43+0000",
        "shell.execute_reply": "2024-08-09T14:43+0000"
    },
    "trusted": true
}

notebook metadata:

{
    "kernelspec": {
        "display_name": "Java",
        "language": "java",
        "name": "java"
    },
    "language_info": {
        "codemirror_mode": "java",
        "file_extension": ".jshell",
        "mimetype": "text/x-java-source",
        "name": "Java",
        "pygments_lexer": "java",
        "version": "11.0.16.1+1-LTS"
    }
}

[krassowski]

Well, this is what the metadata says - all values are equal to 2024-08-09T14:43+0000 . This extension simply renders these values as computed by the kernel and extracted by JupyterLab.

Possibly the Java kernel that you are using is not reporting started in execution metadata, or has a non-standard message reply sequence. The relevant code for metadata extraction is in jupyterlab, here and around it.

[krassowski]

Which Java kernel are you using? https://github.com/SpencerPark/IJava or https://github.com/allen-ball/ganymede or something else?

[miechoo]

The IJava v 1.3.0

[krassowski]

In that case I would recommend reporting the issue over in https://github.com/SpencerPark/IJava.

[krassowski]

That said, IJava was not updated in last 5 years. https://github.com/allen-ball/ganymede looks active though - maybe a better fit for 2024?