dummy data of csv format

dummy.go

package main

type A struct {
	id   string
	name string
	age  string
	time string
	c00  string
	c11  string
	c12  string
	c13  string
	c14  string
	c15  string
	c16  string
	c17  string
	c18  string
	c19  string
	c20  string
	c21  string
	c22  string
	c23  string
	c24  string
	c25  string
	c26  string
	c27  string
	c28  string
	c29  string
	c30  string
	c31  string
	c32  string
	c33  string
	c34  string
	c35  string
	c36  string
	c37  string
	c38  string
	c39  string
}

func main() {
	num := 88000000
	d := make([][]string, num)
	prefix := "qwertyuiopasdfghjklzxcvbnm"
	var wg sync.WaitGroup
	for i := 0; i < num; i++ {
		wg.Add(1)
		go func(i int) {
			defer wg.Done()
			d[i] = []string{
				strconv.Itoa(i),
				fmt.Sprintf("Name_%d", i),
				strconv.Itoa(i),
				time.Now().String(),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
			}
		}(i)
	}
	wg.Wait()

	file, _ := os.Create("8g.csv")
	defer file.Close()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	var a A
	header := structs.Names(a)
	writer.Write(header)
	writer.WriteAll(d)
	writer.Flush()
}
package main

import (
	"encoding/csv"
	"fmt"
	"os"
	"strconv"
	"sync"
	"time"

	"github.com/3-shake/reckoner-cdp/bazel-gopath/src/github.com/fatih/structs"
)

type A struct {
	id   string
	name string
	age  string
	time string
	c00  string
	c11  string
	c12  string
	c13  string
	c14  string
	c15  string
	c16  string
	c17  string
	c18  string
	c19  string
	c20  string
	c21  string
	c22  string
	c23  string
	c24  string
	c25  string
	c26  string
	c27  string
	c28  string
	c29  string
	c30  string
	c31  string
	c32  string
	c33  string
	c34  string
	c35  string
	c36  string
	c37  string
	c38  string
	c39  string
}

func main() {
	num := 88000000
	d := make([][]string, num)
	prefix := "qwertyuiopasdfghjklzxcvbnm"
	var wg sync.WaitGroup
	for i := 0; i < num; i++ {
		wg.Add(1)
		go func(i int) {
			defer wg.Done()
			d[i] = []string{
				strconv.Itoa(i),
				fmt.Sprintf("Name_%d", i),
				strconv.Itoa(i),
				time.Now().String(),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
				fmt.Sprintf("%s_%d", prefix, i),
			}
		}(i)
	}
	wg.Wait()

	file, _ := os.Create("8g.csv")
	defer file.Close()

	writer := csv.NewWriter(file)
	defer writer.Flush()

	var a A
	header := structs.Names(a)
	writer.Write(header)
	writer.WriteAll(d)
	writer.Flush()
}