How to see list of plugins
There are a lot of tools available Below are my personal favourites Pingdom http://tools.pingdom.com/fpt Google Pagespeed https://developers.google.com/speed/pagespeed/insights GTMetrix gtmetrix.com
performance
Prevent CSS/JS loading when plugin is not used
You need to use action wp_enqueue_scripts except wp_head like: function inf_remove_junk() { if (!is_admin()) { wp_dequeue_style(‘js_composer_front’); wp_dequeue_style(‘js_composer_custom_css’); wp_dequeue_script(‘wpb_composer_front_js’); } } add_action( ‘wp_enqueue_scripts’, ‘inf_remove_junk’ ); But it remove the scripts from front end. I think on archive pages VC does not execute it’s shortcode. So you can check is_archive() condition instead of is_admin(). Or you can … Read more
Prevent five different copies of jquery from being included on every page
There is no blanket solution to this. If developer has a clue – he will reuse bundled jQuery or re-register it to other copy (commonly done to load jQuery from Google’s CDN). Otherwise there are a lot of [insane] ways to add jQuery and there is no way to handle them all without global output … Read more
WordPress website loads but is not displayed until page scrolled
I have visited your site in several browsers, including Chrome, and everything is working fine. The sole fact that you only experience the problem only in chrome, already means that this question is about the browser, not about WordPress. So, it’s off topic here. Anyway, Chrome is known to show this kind of behaviour under … Read more
Changing BIGINT to INT
There should not be any downside. The user ID is cast to int in many places in the WP PHP files anyway. But I don’t think this is a real performance problem. If your queries are slow, it might be more useful to inspect each of them and look for opportunities to improve the queries … Read more
When Uploading JPEGs, Does WordPress Compress the Original Image?
This is all I can get from reading the source code for the wp_handle_upload function in wp-admin/includes/file.php. WordPress keeps the original uploaded file (usually) – see below… WordPress does apply JPEG compression to resized images when the source is a JPEG. The default JPEG compression level is 90. You can adjust the JPEG compression level … Read more
WP_Query Performance Issues with meta_query
Custom field data is stored in the postmeta table, and it’s likely that scanning through this table is causing slowness. You should: install the debug bar plugin which will give you more insight into the queries that are being executed against the database – you’ll be able to see how long each query takes, and … Read more
Relationship between performance and database size
A bigger database isn’t per definition slower, and a smaller database isn’t per definition faster. When a table contains a large amount of information, it could take longer for queries to get their results, depending on the type of query, the amount of data you want to return, the table structure attributes, types and indexes. … Read more
Hardcoding and WordPress Performance
This is a PHP question not related at all to WP, but since it was upvoted…. TL;Dr version – Compilres do this kind of micro optimizations much better then you, no point in even trying. lets look at what compilers will do with your question code // is this less efficient $meta = get_post_meta($post->ID,’meta’); $permalink … Read more
Universal problem: first request after ~25 second inactivity always slower (~1 second) than subsequent requests (~1/10sec)
Without looking at your box to see exactly what’s going on, here are some potential avenues of slowness: Potential Causes Apache Apache is usually configured in such a way that a single httpd process is always running in the background. When a request comes in over the wire, it spins up a new httpd process … Read more