How do I profile slow queries using pgx?

package main

import (
    "context"
    "database/sql"
    "fmt"
    "log"
    "time"

    "github.com/jackc/pgx/v4"
    "github.com/jackc/pgx/v4/pgxpool"
)

func main() {
    ctx := context.Background()

    // Connect to the database with pgx pool
    dbpool, err := pgxpool.Connect(ctx, "postgres://user:password@localhost:5432/mydb")
    if err != nil {
        log.Fatalf("Unable to connect to database: %v\n", err)
    }
    defer dbpool.Close()

    // Start profiling
    start := time.Now()

    // Example of a slow query
    query := "SELECT * FROM my_table WHERE some_column = $1"
    var result string
    err = dbpool.QueryRow(ctx, query, "value").Scan(&result)
    if err != nil {
        log.Fatalf("Query failed: %v\n", err)
    }

    // Measure elapsed time
    elapsed := time.Since(start)
    fmt.Printf("Query executed in %s\n", elapsed)
}