What would you do if you noticed that the server-side is experiencing delays?

If I notice delays in the server-side operation, I first perform diagnostics:

1. Check logs for errors or warnings.
2. Analyze CPU load, memory, disk usage, and network on the server.
3. Use profiling and request tracing to identify bottlenecks in the code or database.
4. Check the response times of external services if the server depends on them.

After identifying the cause, I take measures: optimize code, improve database queries, scale resources, or configure caching.

Example in Go for measuring function execution time:

start := time.Now()
// call function
processRequest()
elapsed := time.Since(start)
log.Printf("Request processing time: %s", elapsed)