Google PageSpeed Insights – How to fix?

I’ve just fixed the compression and leverage cache issues using these tutorials:
https://www.feedthebot.com/pagespeed/enable-compression.html
http://gtmetrix.com/leverage-browser-caching.html

But I’d still need to fix the other one.

Thanks again.

• This reply was modified 9 years, 2 months ago by gasto.

Yes, here’s the link

Thanks for the reply, it’s a little bit better now :)
One last question, on gtmetrix.com it says that I should “Defer parsing of JavaScript”, I searched on Google for this and one guy on this blog said that I should include this on my functions.php:

function defer_parsing_of_js ( $url ) {
if ( FALSE === strpos( $url, ‘.js’ ) ) return $url;
if ( strpos( $url, ‘jquery.js’ ) ) return $url;
return “$url’ defer=’defer”;
}
add_filter( ‘clean_url’, ‘defer_parsing_of_js’, 11, 1 );

However, I get this error afterwards: “Parse error: syntax error, unexpected ‘$url’’ (T_VARIABLE)…”

Any suggestions?
Thanks

OK, deprecated means it cannot be used anymore on WordPress?
If so, any other suggestions or workaround for that code above?

If javascript defer is not such an important thing let me know, I’ve really no idea what it is, I just know it appears as an issue on gtmetrix.com.
Thanks again.

All clear now.
Thanks!