How Data URI Can Slash Image Requests and Boost Page Performance
Embedding images as base64‑encoded Data URIs can dramatically cut the number of HTTP requests, improving page performance, though it enlarges the HTML size—a trade‑off that can be softened with gzip compression and is best suited for frequently used static assets.
One important guideline for improving page access performance is to reduce the number of requests.
Common methods include merging CSS/JS files and using sprite images.
Another effective technique is to replace image src with a Data URI.
Typically images are referenced via src attribute, e.g.
.
Using a Data URI embeds the image directly as a base64‑encoded string, for example
.
Advantages
It can dramatically reduce the number of image requests.
Disadvantages
It increases the page size, which may affect load time, though this can be mitigated by enabling gzip compression.
Notes
Switching to this method may affect how images are stored or how backend code handles them; it is recommended to use it in appropriate scenarios, such as for frequently used static resource images.
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