今日は以下の記事よりソーシャルボタンのスクリプト読み込み最適化についてメモしておきたいと思います。
Delay-load non-essential scripts (e.g., Facebook Like, Google +1, Twitter).
Everyone wants their page to be popular on social networks, but social network scripts tend to be large and can cause sluggish response for the user. Waiting until the page has loaded before requesting these scripts can make the page responsive sooner. Even better, rethink whether these buttons are necessary at all, and whether they improve your page's overall experience.