Does Util.Cache() reliably cache the results of asynchronous functions?

JeffMercado

Title. With this test, it does seem to work, but should I expect it to?

async Task Main()
{
    $"Running now: {DateTime.Now}".Dump();
    var date = await Util.Cache(async () => await GetDate(), "now");
    date.Dump();

    async Task<DateTime> GetDate()
    {
        await Task.Delay(3000);
        return DateTime.Now;
    }
}

JoeAlbahari

I don't see why not. You're caching a task, so on subsequent runs, Util.Cache will return the same (completed) task.

JeffMercado

Ok great. I was under the impression that all objects needed to be serializable and since tasks weren't, I wasn't sure it would/should work.

JoeAlbahari

The serializable restriction applies to types that you've defined in the script itself, when you make changes to the script. For other types, it can re-use the existing object.