What are your experience with super sped up affirmations?

I am currently making some subliminals for my self where affirmations are 8× times sped up. I used to make subliminals with normal speed but the duration was extremely long. So, i thought may be i should try speeding up. My biggest concern is I am not able to understand my affirmations that much. I have four layers.

I tried to search about it here but it has mix reaction in this community.