Why are you performing a task?
Quite often it is because you’re at work and your job is to complete that task.
If your task become to improve yourself and your abilities you’re doing deliberate practice. Your focus now is to gain or master a new skill. Take your time and focus on the process, on the journey and not on the destination. When finished repeat slowly, again.
Paid development is the opposite of deliberate practice and you should find some time to do some if you’re interested in becoming a better professional developer. Ask yourself: how much time do you spend improving the code of someone else and how much time do you spend improving yourself?