300-445 Question 196
Select 3An e-commerce web application is experiencing slow performance during checkout, and you are tasked with diagnosing the issue using a browser waterfall tool. The waterfall shows high Time to First Byte (TTFB) for the checkout API call and significant delay in loading third-party payment scripts. What should you investigate further to address the performance issue?
- A
Server-side processing delays for the checkout API
- B
Network latency between the browser and the web server
- C
Performance of third-party payment scripts
- D
Incorrect caching policies for static assets
- E
Browser compatibility issues with the payment scripts
Show answer and explanation
Correct answers: A, B, C
Explanation
The browser waterfall revealed high TTFB for the checkout API and delays in loading third-party payment scripts. To diagnose the performance issue effectively, you need to investigate server-side processing, network latency, and the performance of third-party scripts, as these factors directly impact the observed behavior. Caching policies and browser compatibility are not primary contributors to the issue in this case.
- A. Correct.
High TTFB for the checkout API could indicate server-side processing delays, which need to be analyzed to optimize backend performance.
- B. Correct.
Network latency can directly impact TTFB and overall load time, making it important to investigate network-related issues.
- C. Correct.
Slow-loading third-party payment scripts can significantly delay the checkout process and must be analyzed for optimization or alternatives.
- D. Incorrect.
Caching policies generally impact static assets like images or stylesheets, not dynamic API calls or third-party scripts, so this is less relevant in this scenario.
- E. Incorrect.
Browser compatibility issues might cause errors but are unlikely to directly explain high TTFB or delays in loading third-party scripts.