What methods of performance replication in software systems can you name?

Methods of performance profiling in software systems include:

• CPU profiling — measuring the execution time of functions and methods, identifying bottlenecks in the code.
• Memory profiling — analyzing memory usage, detecting leaks and excessive consumption.
• Tracing — detailed collection of information about function calls and events during execution.
• Logging with metrics — collecting statistics and metrics for performance analysis.
• Load testing — testing system behavior under high load.

In Go, the pprof package is often used for profiling, which allows collecting and analyzing data on CPU, memory, and locks.

Example of using pprof:

import (
    "net/http"
    _ "net/http/pprof"
)

func main() {
    go func() {
        log.Println(http.ListenAndServe("localhost:6060", nil))
    }()
    // main program logic
}

Then, you can connect to http://localhost:6060/debug/pprof/ for analysis.