Idle – 62°C
Phoronix benchmarks download/installation – 64°C
John The Ripper – 73°C
I also typed a few commands to get the system temperature and CPU clock, in this case during John the Ripper benchmark:

temp=85.0'C

So the CPU is clocked down to around 1.0 GHz since proper cooling is not implemented for this type of workload, and the system automatically lowers the CPU frequency.

pas plus perf que le pi3 si pas bien refroidit ... (en bench en tout cas)

autre test :
https://www.tomshardware.com/reviews/raspberry-pi-4-b,6193.html

https://www.cnx-software.com/2019/06/26/raspberry-pi-4-4k-video-playback-libreelec/