foo.go

package main

import (
	"fmt"
	"regexp"
	"sync"
)

var re1 = regexp.MustCompile("hoge.*")
var re2 = regexp.MustCompile("foo.*")

func main() {
	v := map[int]int{}

	var wg sync.WaitGroup
	var mu sync.RWMutex
	for i := 0; i < 100; i++ {
		i := i
		wg.Add(1)
		go func() {
			defer wg.Done()
			for k := 0; k < 1000; k++ {
				j := i * k
				mu.Lock()
				v[j] = k
				mu.Unlock()
			}
		}()
	}

	wg.Wait()
	for _, vv := range v {
		fmt.Println(vv)
	}
	go func() {
		re10 := re1.Copy()
		re10.FindString()
	}()

	go func() {
		re11 := re1.Copy()
		re11.FindString()
	}()
}