From a3fb69689b332dd9ea3f41a5d8fbb2fc588c1c58 Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Tue, 3 Jul 2012 20:06:02 +0200
Subject: [PATCH] use buffered channels, as per Robs suggestion

---
 zscan.go | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/zscan.go b/zscan.go
index f1b92393..f636280f 100644
--- a/zscan.go
+++ b/zscan.go
@@ -105,7 +105,7 @@ func NewRR(s string) (RR, error) {
 // ReadRR reads the RR contained in q. Only the first RR is returned.
 // The class defaults to IN and TTL defaults to DefaultTtl.
 func ReadRR(q io.Reader, filename string) (RR, error) {
-	r := <-ParseZone(q, ".", filename)
+	r := <-parseZoneHelper(q, ".", filename, 1)
 	if r.Error != nil {
 		return nil, r.Error
 	}
@@ -129,9 +129,14 @@ func ReadRR(q io.Reader, filename string) (RR, error) {
 //		}
 //	}      
 func ParseZone(r io.Reader, origin, file string) chan Token {
-	t := make(chan Token)
+	return parseZoneHelper(r, origin, file, 10000)
+}
+
+func parseZoneHelper(r io.Reader, origin, file string, chansize int) chan Token {
+	t := make(chan Token, chansize)
 	go parseZone(r, origin, file, t, 0)
 	return t
+
 }
 
 func parseZone(r io.Reader, origin, f string, t chan Token, include int) {
@@ -141,7 +146,7 @@ func parseZone(r io.Reader, origin, f string, t chan Token, include int) {
 		}
 	}()
 	s := scanInit(r)
-	c := make(chan lex)
+	c := make(chan lex, 1000)
 	// Start the lexer
 	go zlexer(s, c)
 	// 6 possible beginnings of a line, _ is a space