**Describe the situation**
```
$ ./clickhouse-21.3.3 client --query "SELECT * FROM system.numbers_mt FORMAT Native" | pv > /dev/null
^C,1GiB 0:00:45 [ 710MiB/s] [                                                                                                                                                                                               <=>                      ]

$ ./clickhouse-21.3.3 client --compress 0 --query "SELECT * FROM system.numbers_mt FORMAT Native" | pv > /dev/null
^C,2GiB 0:00:12 [1,48GiB/s] [                                                   <=>                                                                                                                                                                  ]
```

{
    auto pos = host_port_string.find_last_of(':');
    if (pos == std::string::npos)
        throw Exception("Incorrect <host>:<port> format " + host_port_string, ErrorCodes::SYNTAX_ERROR);
    return {unescapeForFileName(host_port_string.substr(0, pos)), parse<UInt16>(host_port_string.substr(pos + 1))};
}
String Cluster::Address::toFullString(bool use_compact_format) const
{
    if (use_compact_format)
    {
        if (shard_index == 0 || replica_index == 0)
            
            throw Exception("shard_num/replica_num cannot be zero", ErrorCodes::LOGICAL_ERROR);
        return "shard" + std::to_string(shard_index) + "_replica" + std::to_string(replica_index);
    }
    else
    {
        return
            escapeForFileName(user)
            + (password.empty() ? "" : (':' + escapeForFileName(password))) + '@'
            + escapeForFileName(host_name) + ':' + std::to_string(port)
            + (default_database.empty() ? "" : ('#' + escapeForFileName(default_database)))
            + ((secure == Protocol::Secure::Enable) ? "+secure" : "");
    }
}
Cluster::Address Cluster::Address::fromFullString(const String & full_string)