1workers.go

func main() {
    jobs := make(chan int, 100)
    results := make(chan int, 100)

    go worker(jobs, results)

    for ^100 {
        jobs <- i
    }
    close(jobs)

    for ^100 {
        print <- results
    }


func worker(jobs <-chan int, results chan<- int) {
for n := range jobs {
    results <- fib(n)
}
}

func fib(n int) int {
    if n <= 1 {
         return n
    }
    return fib(n - 1)
}

2workers.pl6

sub MAIN() {
    my $jobs = Channel.new;
    my $results = Channel.new;

    for ^4 {
        start worker($jobs, $results);
    }

    $jobs.send($_) for ^100;
    $jobs.close;

    react whenever $results.Supply -> $result {
        say $result;
    }
}

sub worker($jobs, $results) {
    react whenever $jobs.Supply -> $job {
        $results.send: fib($job);
        LAST { $results.close }
    }
}

sub fib($n) {
    return 1 if $n <= 1;
    return fib($n - 1) + fib($n - 2);
}

3map.pl6

sub fib($n) {
    return 1 if $n <= 1;
    return fib($n - 1) + fib($n - 2);
}

my @jobs = 0..100;
my $results = @jobs.race(batch => 1, degree => 4).map({ fib($_) });

react whenever $results.Supply -> $result {
    $result.say;
}