5a078180d0
Disable MBEDTLS_SHA256_SMALLER implementation, not enabled by default in upstream and reduces performance by quite a bit. Source: include/mbedtls/config.h Enable an implementation of SHA-256 that has lower ROM footprint but also lower performance. The default implementation is meant to be a reasonnable compromise between performance and size. This version optimizes more aggressively for size at the expense of performance. Eg on Cortex-M4 it reduces the size of mbedtls_sha256_process() from ~2KB to ~0.5KB for a performance hit of about 30%. The size of mbedtls increased a little bit: ipkg for mips_24kc before: 164.382 Bytes ipkg for mips_24kc after: 166.240 Bytes Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net> |
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