There are so many social button and social share wordpress plugins. Which are so beautiful and nice plugins.
But these plugin can cause wild swings in page load times and page load. Sometimes, facebook is busy and that icon slows down your page, sometimes it is twitter.
Some time admin selected so many social icons to show and it takes time to load because that many apache requests will go to server. I personally tested some blogs and They are facing same page load issue. Commonly wordpress page will load in in 5 to 6 seconds without this wordpess plugin. But with these plugin it is taking 50 to 60 seconds to load the page.
It will effect to SEO of your site.
We tested the following social icons buttons.
Twitter, Twitter (tweet), Facebook, Facebook (like), Delicious, Google Bookmarks, Google Reader, Google email, Posterous, and StumbleUpon.
All icons are failing some time and that causes page load error with your wordpress site. I tested other plugins also which are not for social sharing purpose but there were no issue with worpdress page loading.
Commonlay these type of plugin will load into your post, page and excerpt. If you open home page or archive page. you will face the slowness.
I am not saying not to use the social share or social button plugin in your wordpress site. But you need to think about wordpress plugins which is causing issue to your site.
I recommond following wordpress plugins which are really nice.
Normally social sharing codes provided by facebook, twitter, etc renders iframes at run-time. These iframes increases page-size and slow-down your website (on client-side).
Up your website’s social score with a little social Flare! Easily configure and share your blog posts across some of the most popular networks.
Social buttons attract more visitors to your site. When users +1, Tweet, or Like your page, it advertises your page to their friends and followers. This plugin adds social buttons to your posts as a small sprite at first and delays loading the real buttons until the user hovers over the social buttons. It delays ~300KB of social button components by loading <6.5KB of our own script and sprite. onMouseOver activates the load of the ~300KB of social button components.
No one likes long load times, but we all want to be able to share our content via Facebook, Twitter, and other social networks. These take a long time to load. Paradox? Not anymore! With WPSocialite (utilizing David Bushell’s amazing SocialiteJS plugin [http://www.socialitejs.com/]) we can manage the loading process of our social sharing links. Load them on hover, on page scroll, and more!