main.go

package main

import (
	"io"
	"log"
	"net/http"
	"time"
)

func main() {
	go massageBallast()

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		resp, err := http.Get("https://sim.cfperf.net/cached-assets/zero-5g.bin")
		if err != nil {
			log.Fatalf("Error sending a request: %v", err)
		}

		defer resp.Body.Close()

		n, err := io.Copy(w, resp.Body)

		if err != nil {
			log.Fatalf("Error copying response body: %v", err)
		}

		log.Printf("Copied %d bytes", n)
	})

	err := http.ListenAndServe(":4444", nil)
	if err != nil {
		log.Fatalf("Error listening: %v", err)
	}
}

func massageBallast() {
	ballast := make([]uint8, 4*1024*1024*1024)

	for i := range ballast {
		ballast[i] = uint8(i % 8)
	}

	for {
		sum := 0
		for _, b := range ballast {
			sum += int(b)
		}

		time.Sleep(1 * time.Second)

		log.Printf("sum = %d", sum)
	}
}