producer consumer - Conditional Go Routine/Channel -

i make statistics routine conditional runs on cases otherwise waste cycles half time. right have 1 go routine act producer feed 2 consumer routines via buffered channels. there way can make statistics routine conditional or there better pattern should follow? in advance , help!

func main() {     options()     go produce(readcsv(loc))     go process()     go statistics() // on flag     <-done }  func produce(entries [][]string) {     regex, err := regexp.compile(reg)     if err != nil {         log.error(reg + ", not valid regular expression")     } else {         _, each := range entries {             if regex.matchstring(each[col]) {                 matches <- each                 stats <- each // on flag             }         }     }     done <- true }  func process() {     {         match := <-matches         if len(match) != 0 {             // process         }     } }  func statistics() {     {         stat := <-stats         if len(stat) != 0 {             // statistics         }     } } 

there nothing wrong making conditional:

var stats chan []string  // don't initialize stats.  func main() {     options()     go produce(readcsv(loc))     go process()     if flag {         stats = make(chan []string, 1024)         go statistics() // on flag     }     <-done }  func produce(entries [][]string) {     regex, err := regexp.compile(reg)     if err != nil {         log.error(reg + ", not valid regular expression")     } else {         _, each := range entries {             if regex.matchstring(each[col]) {                 matches <- each                 if stats != nil {                     stats <- each // on flag                 }             }         }     }     close(done) }  func process() {     {         select {         case match := <-matches:             if len(match) != 0 {               // process             }         case <-done:             return         }     } }  func statistics() {     {         select {         case stat := <-stats:             if len(stat) != 0 {                 // statistics             }         case <-done:             return         }     } }