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what is the dhrystone numbers for m85 on gcc compiler?
Actually, we are far off (<1/2) from the claimed Dhrystone on ARM Compiler and hence looking if anyone has calcualted DMIPS for M85 with GCC
The below page quotes numbers using Arm Compiler for Embedded 6.18, which should help you estimate for other compilers.
https://developer.arm.com/Processors/Cortex-M85