Lucid dreams allow a person to be conscious while dreaming. It has been reported that it's possible to control various aspects of the dream environment that are not possible during wakefulness, e.g. ability to fly.
Research has shown that the rate of time flow in a dream is same/similar to that of wakefulness. For example, an event that lasts about 5 minutes in a dream, corresponds to about 5 minutes of sleeping. Extending the idea that physically impossible things can be performed during lucid dreams, the question arises whether altering the flow of time, specifically slowing of it, is possible.
Philosopher Alan Watts has stated that it might be possible to alter the flow of time in a dream:
[...] let’s suppose that you were able every night to dream any dream you wanted to dream, and that you could for example have the power within one night to dream 75 years of time, or any length of time you wanted to have. [...] And after several nights of 75 years [...] each [...]
If such alteration would be possible in a lucid dream, it would suggest the possibility of kind of "mental life extension", where, for example, the person physically lives ~80 years, but mentally, through lucid dreams, experiences the life of hundreds or thousands of years.
Question: Is there anecdotal, or otherwise, evidence or documented past attempts for slowing of perceived passage of time via lucid dreaming?