Debugging Go applications with Visual Studio Code and Delve is extremely powerful. However, there are some default settings which you may want to tweak to improve this experience and they’re not straightforward to find out.

Sometimes when you’re debugging if a variable’s value is really long, i.e. more than 64 characters, you’ll see the value’s content end as “…+7 more” or however many characters were truncated. To get around this, you need to customize your workspace or user settings in Visual Studio Code.

Open your user settings or workspace settings (CTRL + SHIFT + P) => type settings and choose one from the dropdown list. Then, check out this JSON for various settings you can configure. The maxStringLen setting is the one you care about the most. Note that depending on these settings you can cause serious perf gain/loss, so tinker with them.

{
    "go.delveConfig": {
        "useApiV1": false,
        "dlvLoadConfig": {
            "followPointers": true,
            "maxVariableRecurse": 3,
            "maxStringLen": 300,
            "maxArrayValues": 64,
            "maxStructFields": -1
        }
    }
}

Here is the source code for the related configuration loading.

And there’s some useful discussion here before the feature was added.

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