reorganize loop

cmd/convergents.go

@@ -42,13 +42,15 @@ func gaussianBrackets(ch <-chan *big.Int) <-chan *big.Int {
 	x := big.NewInt(1)
 
 	go func() {
-		out <- big.NewInt(1)
+		tmp := new(big.Int)
 		for a := range ch {
-			tmp := new(big.Int).Mul(a, x)
+			out <- x
+
+			tmp.Mul(a, x)
 			tmp.Add(tmp, xprev)
+
 			xprev.Set(x)
-			x.Set(tmp)
-			out <- tmp
+			x = new(big.Int).Set(tmp)
 		}
 	}()