Algorand app address lookup table

main.go

package main

import (
	"bufio"
	"fmt"
	"log"
	"os"
	"time"

	"github.com/algorand/go-algorand-sdk/crypto"
	"github.com/algorand/go-algorand-sdk/types"
)

var addresses [10_000_000]types.Address
var index int

func getAddr(appID uint64) {
	if index == 10_000_000 {
		appendToFile()
		index = 0
	}
	addresses[index] = crypto.GetApplicationAddress(appID)
	index++
}

func getAddresses(start uint64, end uint64) {
	for i := start; i < end; i++ {
		getAddr(i)
	}
}

func appendToFile() {
	file, err := os.OpenFile("table.txt", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)

	if err != nil {
		log.Fatalf("failed creating file: %s", err)
	}

	datawriter := bufio.NewWriter(file)

	for _, addr := range addresses {
		_, _ = datawriter.WriteString(addr.String() + "\n")
	}

	datawriter.Flush()
	file.Close()
}

func main() {
	start := time.Now()
	index = 0

	getAddresses(1, 100_000_000)

	fmt.Println(time.Since(start))

	appendToFile()

}