Follow on to comment is too long so done as answer: As I understand it your test site works as HTTPS unless WPSC is activated? Another (quick to test) hunch: Under WPSC “Advanced” settings: check on “Simple” then check the “Late Init” (and/or “HTTP Headers”) boxes – save settings. N.B. if you deactivate WPSC these … Read more
You need to have a lot of traffic for naive protocol based optimizations to be effective, and even then it is not obvious that you can gain much even when it does kick in. Most people will be first time users of your site, and browser have only a limited space to store information about … Read more
The option_value column in the database is LONGTEXT, meaning it can hold up to 4GB of text. But keep in mind that WordPress loads all options on every page load by default, and storing large values for options you only intend to use on a single page is inefficient. Either set the autoload argument of … Read more
In the end, I used speed booster plugin to defer javascript and inline CSS. For minifying, I manually minify the .js script and .css files before hand. This helped to improve my pagespeed score without going through first load issue. Like Tom J Nowell suggested, do not use brute force hammer approach by using plugins … Read more
In Autoptimize, in the Javascript Options, there’s a field to ‘Exclude scripts from Autoptimize’, you will add a script to the field. You will need to add a comma to the last script already in the field then add this after: /recaptcha/api.js Hopefully, this helps. Best, Carm
If it’s browser cache, you can go into the dev tools and disable all local cache. Browser docs can tell you how to do this. If it’s the proxy cache, either turn it off or load the site without the proxy, and retest. You will need to consult the documentation for the proxy you’re using … Read more
You can use the second parameter passed to the wp_feed_cache_transient_lifetime filter which, in the context of fetch_feed(), is the URL of the feed: add_filter( ‘wp_feed_cache_transient_lifetime’, function ( $time, $url ) { if ( $url === ‘https://example.com/rss’ ) { $time = MONTH_IN_SECONDS; } return $time; }, 10, 2 );
It would be a bad idea to combine common CDN served files that the majority of web users already have cached for obvious reasons…
I looked at the source code of the site and found this: <meta name=”robots” content=”noodp,noydir,noarchive,nosnippet”/> Apparently noarchive tells Google to not cache the page. Check out Google Webmaster Tools documentation/guidelines for “Meta tags” for more info on what each value does. PS: If you are unaware, nosnippet should also be removed as it “prevents a … Read more
If WordPress is using APC it will use it for its object cache, and since APC is per machine, not per cluster, the two will diverge, giving you problems if you’re trying to run 1 site off of two machines. In that scenario you will want 1 memcached deamon running, and configure your 2 servers … Read more