Ok now im done with those benchmarks for my device Galaxy Note 8 SM-N9500 Qualcomm Snapdragon 835 🙂

Android 7.1.1
interactive governor = ~1000
performance governor = ~800

Android 8.0
interactive governor = ~850
performance governor = ~720

Android 9
interactive governor = ~870
performance governor = ~690

Edit: Btw Alex what app did you used to change the cpu profile to 1 core?