8Mar
Why are there significantly different performance results using openssl speed when using -aead and not using it?
If I take the following two commands, the results between the two are incredibly different:
openssl speed -aead -evp AES-128-CBC-HMAC-SHA256 -seconds 30
openssl speed -evp AES-128-CBC-HMAC-SHA256 -seconds 30
The results for the first look like:
2 bytes 31 bytes 136 bytes 1024 bytes 8192 bytes 16384 bytes
26,614.91k 362,373.52k 1,547,884.13k 11,946,116.73k 94,651,093.34k 189,574,719.91k
And the results for the second look like:
16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
438,548.92k 894,497.63k 1,337,354.57k 1,581,342.47k 1,650,846.18k 1,655,817.68k
I'm not talking about the slightly different block sizes. After you get into the 1,024 block size, the performance is incredibly different. Why?
