lopers should be aware of the negative performance implications of calling these functions multiple times and should consider using <a href="../man3/EVP_MD_fetch.html">EVP_MD_fetch(3)</a> with <a href="../man7/EVP_MD-BLAKE2.html">EVP_MD-BLAKE2(7)</a> instead. See <a href="../man7/crypto.html">&quot;Performance&quot; in crypto(7)</a> for further information.</p>

<p>Both algorithms support a variable-length digest, but this is only available through <a href="../man7/EVP_MD-BLAKE2.html">EVP_MD-BLAKE2(7)</a>.<