From dbc4ac6945492da8aa9e84cab015d59cdf6b8fff Mon Sep 17 00:00:00 2001
From: astaxie <xiemengjun@gmail.com>
Date: Wed, 16 Dec 2015 23:43:32 +0800
Subject: [PATCH] reduce the slicegrow

---
 context/input.go | 8 +++++---
 tree.go          | 3 ++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/context/input.go b/context/input.go
index 3f73787d..7e9f50b6 100644
--- a/context/input.go
+++ b/context/input.go
@@ -50,7 +50,8 @@ type BeegoInput struct {
 // NewInput return BeegoInput generated by Context.
 func NewInput() *BeegoInput {
 	return &BeegoInput{
-		pvalues: make([]string, maxParam),
+		pnames:  make([]string, 0, maxParam),
+		pvalues: make([]string, 0, maxParam),
 		data:    make(map[interface{}]interface{}),
 	}
 }
@@ -60,6 +61,7 @@ func (input *BeegoInput) Reset(ctx *Context) {
 	input.Context = ctx
 	input.CruSession = nil
 	input.pnames = input.pnames[:0]
+	input.pvalues = input.pvalues[:0]
 	input.data = nil
 	input.RequestBody = []byte{}
 }
@@ -264,7 +266,7 @@ func (input *BeegoInput) ParamsLen() int {
 // Param returns router param by a given key.
 func (input *BeegoInput) Param(key string) string {
 	for i, v := range input.pnames {
-		if v == key {
+		if v == key && i <= len(input.pvalues) {
 			return input.pvalues[i]
 		}
 	}
@@ -273,7 +275,7 @@ func (input *BeegoInput) Param(key string) string {
 
 // SetParam will set the param with key and value
 func (input *BeegoInput) SetParam(key, val string) {
-	input.pvalues[len(input.pnames)] = val
+	input.pvalues = append(input.pvalues, val)
 	input.pnames = append(input.pnames, key)
 }
 
diff --git a/tree.go b/tree.go
index dbcc63c9..2092016f 100644
--- a/tree.go
+++ b/tree.go
@@ -288,7 +288,8 @@ func (t *Tree) Match(pattern string, ctx *context.Context) (runObject interface{
 	if len(pattern) == 0 || pattern[0] != '/' {
 		return nil
 	}
-	return t.match(pattern, nil, ctx)
+	w := make([]string, 0, 20)
+	return t.match(pattern, w, ctx)
 }
 
 func (t *Tree) match(pattern string, wildcardValues []string, ctx *context.Context) (runObject interface{}) {