[IMPROVE] Cache on long-running command

[arisliang]

What's the feature that should be improved? Some command takes longer time to run, e.g. dd->dp, which might take 1.5 minute or so.

It would be nice if it can be cached to some period of time, especially after market close, to improve those long-running command's performance.

Describe how you would like the feature improved The first command run would still take that long, but subsequent run within the cache validity would return much faster.

Possibly describe the ideal way to improve this Add cache for command, especially after market close.

Additional information Most command probably doesn't need this, just the long-running ones, like things running longer than 10s or so.