now read directory entries in batches to reduce the number of system calls,
      improving performance up to 30%.
    </p>

    <p><!-- https://go.dev/issue/58808 -->
      When <a href="/pkg/io#Copy"><code>io.Copy</code></a> copies
      from a <code>File</code> to a <code>net.UnixConn</code>,
      it will now use Linux's <code>sendfile(2)</code> system call if possible,