Comment 12 for bug 1123272

Tests run (for SHA256, add SHA512 as needed):

(1) time for i in md5 sha1 sha256; do nettle-hash -a $i < /tmp/test ; done
(2) time for i in md5 sha1 sha256; do openssl $i < /tmp/test ; done
(3) ./a.out < /tmp/test

where a.out is

#include <apt-pkg/hashes.h>
#include <iostream>

int main(void)
{
    Hashes h(Hashes::MD5SUM | Hashes::SHA1SUM | Hashes::SHA256SUM);
    h.AddFD(0);
    auto hsl = h.GetHashStringList();

    for (HashString const &h : hsl)
        std::cout << h.toStr() << std::endl;
    return 0;
}

compiled with g++ -lapt-pkg -O2