Ok lets inject some actual science into this discussion instead of just hearsay. The brain is not run on will power or focus of intent, it’s run on chemicals that produce an energetic reaction. These chemicals can only react with each other so fast, no matter how hard we try, they have a limit. The neural impulse is measured in Hz and thus far has been recorded at many different levels. The highest, and somewhat sketchy number found to date is around 1,000Hz or about 1000 impulses per second. Now remember that that’s the extreme. Here’s the sucker for this debate. The brain on average functions at around 300-400 Hz or 300-400 impulses per second. Neurons are chemical machines, the chemicals inside them react dependent on the message they need to get somewhere else. So while it’s feasible that with plenty of bio feedback or maybe just practice in a dream you could get up to 1000 Hz or more for a prolonged period of time it’s unlikely. so you could double your thoughts, make 1 second = 2 seconds (maybe). But again the brain is a chemical machine and those chemicals can only react so fast with each other, not to mention that we’re not talking about getting one neuron to react faster but trillions, dependent on your brain structure quadrillions of them to react faster all at the same time. So while slowing things down to speed up your perception of things is probably definitely possible I highly doubt that it’s more then an illusion being produced by the flow of events. Time is probably still moving relatively close to real time for you.