In the context of Waterfall analysis, what type of resources are indicated by a cache rate lower than 50%?

A cache rate lower than 50% indicates that the resources are not being reused efficiently. This suggests that a significant portion of requests for these resources is resulting in fresh fetches from the server rather than utilizing cached versions. When resources are frequently retrieved from the server rather than the cache, it can point to issues such as poor caching strategy, changes in content that inhibit effective caching, or even user behavior that leads to lower reuse of resources.

In general, a low cache rate indicates that there are opportunities to optimize resource usage, improve loading times, and ultimately enhance the overall efficiency of an application. This is crucial in performance optimization efforts, as efficient caching can reduce server load and latency for end-users.