When playing with some iceland tools which is
https://github.com/iceland2k14/kangaroo i got this speed on CPU
- [24894.64 TeraKeys/s][Kang 28672][Count 2^29.29/2^29.10][Elapsed 06s][Dead 1][RAM 53.4MB/46.0MB]
Is it good bad fake idk but like i know iceland tools are good
iceland2k14 is proprietary and all his tools contain backdoor
do not use iceland2k14 libraries unless you want to loose your keys or findings
good luck