The way I would do it without seeing the implementation: - Atomic to track print order (name it counter). - Results slice stores items: {index, err, data}. -

The way I would do it without seeing the implementation: - Atomic to track print order (name it counter). - Results slice stores items: {index, err, data}. - Goroutines: do work, store result, then loop-check if counter matches index to print (with tiny sleep). Edit: Another solution would be to put printing loop outside with a channel to signal work finished but I don't know how I would avoid using nested loops, one for the items in the list and one to check if the result is back.