Frontend vs. backend performance testing

Which should you do: frontend vs. backend performance testing? The short answer is both. Each has its pros and cons, but hybrid load testing combines them and gives you the most holistic view of performance, including frontend concerns like how quickly a page renders or perceived application performance as well as backend concerns like response times of individual components.
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[@user-bs1jm5ld2q]

can you make tutorial for front end performance testing?