High cpu usage during pitch shifting one sample

[toimp]

I’m not sure, if this is a bug or just the current way how pitch shifting / time stretching is working inside Renoise. I’ve attached a demo song with one pad sample and a cheesy little melody and it takes up 70% cpu usage on my i7 3770k. Maybe it’s possible to optimize it more

high_cpu_usage.xrns

Edit: Ok, it seems lowering the beat sync pattern lines amount also reduce the cpu usage dramatically. So its currently not a good idea to stretch long samples to short ones.

[lilith]

Guess it’s normal. I get 100% and Renoise stops.
i5 (~5 years old)

[taktik]

It’s hard to avoid. See Quality of timestretch for more details please…