mbedtls/docs/3.0-migration-guide.d/modify_MBEDTLS_ECP_FIXED_POINT_OPTIM_behaviour.md

Change MBEDTLS_ECP_FIXED_POINT_OPTIM behaviour

The option MBEDTLS_ECP_FIXED_POINT_OPTIM now use more ROM and does not increase peak RAM usage anymore.

If you are limited by ROM space, you can define MBEDTLS_ECP_FIXED_POINT_OPTIM to 0 in your config file. This will save about 50 KiB ROM space.