TEST_BLOCK_LEN
unsigned char block[TEST_BLOCK_LEN];
alg->name, TEST_BLOCK_COUNT, TEST_BLOCK_LEN);
for (i = 0; i < TEST_BLOCK_LEN; i++)
alg->Update(&context, block, TEST_BLOCK_LEN);
(float) TEST_BLOCK_LEN * TEST_BLOCK_COUNT / seconds / (1 << 20));