SEO Plugin Performance Report for Q2 2022

In June 2021, and then again in September 2021, we compared the performance of the most popular SEO plugins for WordPress. To continue what has become a bit of a tradition, we present the latest SEO performance report for April 2022.

We’ve classified the performance of each SEO plugin into one of three categories (best, average, and worst) and included a baseline chart for WordPress and the 2021 theme. This gives us a good baseline reference for the performance of each SEO plugin – as you will see, the best performing SEO plugins have almost no effect, while the slowest SEO plugin almost doubles the page load time and the number of database queries.

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SEO Plugin Performance Report for Q4 2021

In June of 2021 an SEO plugin for WordPress boasted they were “one of the fastest SEO plugins” available, so using the Query Monitor plugin, we tested the performance of several SEO plugins to see if their claim was true (spoiler alert, it wasn’t).

In the months since that article, there has been a new version of WordPress and new versions of several SEO plugins, so we were curious to see if the SEO plugin performance results had changed for Q4 2021. The WPSSO Core plugin, for example, has integrated their Schema JSON-LD add-on into their Core plugin, so the features of WPSSO Core have increased significantly – would it also affect its performance?

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[Solution] Sharper Thumbnails for Facebook, Google, Open Graph, Pinterest, Schema, SEO, Twitter, etc.

Pop quiz! Did you know?

1) WordPress creates thumbnails automatically?

WordPress uses the larger / full-size image you upload to create smaller thumbnail images (see your WordPress Settings > Media page for the complete list of sizes).

For example, a photo gallery page will show small thumbnails of the larger / full-size images you uploaded. Themes will often include the featured image you selected in a predefined image size and location in the webpage.

2) All images must be sharpened after resizing?

This is such a standard process that Photoshop, for example, automatically applies a default amount of sharpening when resizing any image — you must specifically uncheck an option in Photoshop to avoid sharpenning an image during the resize process!

3) WordPress does not sharpen resized images?

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Why WordPress Image Sizes for Social Sharing and SEO?

All social and SEO plugins – except one that I know of – use the full size image URL from the WordPress media library when adding image meta tags to the webpage (ie. og:image, twitter:image, etc.), and/or adding images to Schema JSON-LD markup for the webpage. This can be problematic for several reasons…

  1. The image resolution may be too small.
  2. The image resolution may be too large and the file size too big.
  3. The aspect ratio (width or height) may exceed a maximum value.
  4. The image displayed on the social / search site is center cropped.

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Social and SEO Plugins with Quality Assurance Features

Most social and SEO plugins can use a post’s featured image, or offer a way to select a custom social image, but do little else to make sure an image is suitable for social sharing – they assume the article author / editor is aware of each social site’s image requirements (minimum and maximum image resolution, aspect ratio, and maximum image file size) and has selected an appropriate image. For example, Facebook requires that all images be larger than 200x200px, preferably 600x315px, or (even better) 1200x630px for high-resolution displays like retina laptops and phones, have an aspect ratio no wider / taller than 3:1, and less than 8 MB in size. Twitter and Google also have their own requirements, which are different than Facebook’s.

Using a social or SEO plugin that creates resized images from the originals you upload, and checks those resized images to make sure they conform to the requirements of each social site, is only part of a complete Quality Assurance solution. All too often, themes also include a few basic social meta tags in their templates (they shouldn’t, but they often do), that prevent social crawlers from reading your webpage meta tags correctly – some meta tags should never be duplicated (Facebook, for example, can reject all meta tags because of a single duplicate), or the theme may include the full size featured image before all other meta tags, so the wrong image will be used for social shares (this is fairly common). If your social or SEO plugin does not check for duplicate meta tags, you may never realize that you have a problem.

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The Fastest Way to Improve Social and SEO Images

A new add-on for WPSSO Core called WPSSO Tune WP Image Editors is the fastest and easiest way to improve your social and SEO images — simply activate and regenerate your thumbnail images (aka resized images), and you’re done! :-)

How does it work?

Have you noticed that after carefully adjusting an image in Photoshop, you upload it to your site and WordPress creates small images that seems a bit “fuzzy” — nothing like the nice sharp original?

The reason is that after resizing any image, that image must be sharpened – always, but WordPress doesn’t do any sharpening, so the resized image remains a bit “fuzzy” — probably not what you want for a featured image or share on social sites! ;-)

The WPSSO Tune WP Image Editors add-on takes care of this — it automatically applies a reasonable amount of sharpening to all JPEG images resized using the default WordPress ImageMagick editor.

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