In the above picture, I ran a test on Coastal Contact’s eCommerce homepage. At first glance, the thing that popped out to me was the number of resources on the page: over 300 assets were loaded. This number is exceedingly high, particularly for an eCommerce website, as nearly 75% of the top 1000 websites have less than 150 requests.
- Look to reduce the number of requests
- Look to reduce the overall size of the content
- Promote the simultaneous download of assets
Q: Where do I want to host the script(s)?
Q: Is(are) the script(s) fully optimized or concatenated?
A: Looking at the script in the context of a waterfall chart can help you identify the total weight and performance impact of the file. If there is an opportunity for optimization, then minification or concatenation techniques outlined above can be impactful. These techniques can be done manually before deploying the script, or you can leverage a CDN such as Instart Logic that can perform these and other techniques automatically.
Q: Is(are) the scripts loading asynchronously?
A: If the answer to this is no, find out if your vendor has an asynchronous version of the script that you can use instead. Many vendors have come out with widgets that now load asynchronously so make sure you are using the latest version. There are two major reasons to use asynchronous scripts. First, if the 3rd party goes down or is slow, your page won’t be held up trying to load that resource. Second, it can help make that resource more efficient and speed up page loads.
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