diff --git a/index.js b/index.js
index 9f70db9..e7a17c2 100644
--- a/index.js
+++ b/index.js
@@ -7,6 +7,7 @@
 'use strict'
 
 require('es.shim')
+
 const Tool = require('./lib/tool')
 const path = require('path')
 
@@ -22,17 +23,19 @@ class Smarty {
     }
 
     this.__REG__ = new RegExp(this.opt.ext + '$')
-    this.tool = new Tool()
+    this.tool = new Tool(this.opt)
     this.__DATA__ = Object.create(null) // 预定义的变量储存
-    this.__CACHE__ = Object.create(null) // 模块缓存
+    this.__TMP__ = Object.create(null) // 模板缓存
+    this.__CACHE__ = Object.create(null) // 渲染缓存(模板被解析后)
   }
 
   config(key, val) {
     key += ''
-    if (!key || !val) {
+    if (!key || val === undefined) {
       return
     }
     this.opt[key] = val
+    this.tool.opt[key] = val
   }
 
   /**
@@ -58,7 +61,7 @@ class Smarty {
    */
   render(tpl = '', noParse = false) {
     var key = null
-    if (!this.tool.opt.path) {
+    if (!this.opt.path) {
       throw new Error('Smarty engine must define path option')
     }
     if (!tpl) {
@@ -72,17 +75,20 @@ class Smarty {
 
     key = hash(tpl)
 
-    if (this.opt.cache && this.__CACHE__[key]) {
+    if (this.__CACHE__[key]) {
       return Promise.resolve(this.__CACHE__[key])
     }
 
-    this.__CACHE__[key] = this.tool.__tpl__(tpl, noParse)
+    this.__TMP__[key] = this.tool.__readFile__(tpl, noParse)
+
     if (noParse) {
-      return this.__CACHE__[key]
+      this.__CACHE__[key] = this.__TMP__[key]
+      delete this.__TMP__[key]
+      return Promise.resolve(this.__CACHE__[key])
     }
 
     try {
-      this.__CACHE__[key] = this.tool.parse(this.__CACHE__[key], this.__DATA__)
+      this.__CACHE__[key] = this.tool.parse(this.__TMP__[key], this.__DATA__)
       return Promise.resolve(this.__CACHE__[key])
     } catch (err) {
       return Promise.reject(err)
diff --git a/lib/tool.js b/lib/tool.js
index c62a97b..0397c7a 100644
--- a/lib/tool.js
+++ b/lib/tool.js
@@ -8,9 +8,10 @@
 'use strict'
 
 const fs = require('iofs')
+const path = require('path')
 
 class Tool {
-  constructor() {
+  constructor(opt) {
     this.opt = {
       delimiter: ['<!--{', '}-->'], //模板界定符
       labels: {
@@ -31,6 +32,10 @@ class Tool {
       }
     }
 
+    Object.assign(this.opt, opt)
+
+    this.__REG__ = new RegExp(this.opt.ext + '$')
+
     //过滤器
     this.filters = {
       html: function(str = '') {
@@ -67,7 +72,7 @@ class Tool {
     }
   }
 
-  __tpl__(file) {
+  __readFile__(file, noParse) {
     var buf = null
     if (!fs.exists(file)) {
       throw new Error(`Can not find template "${file}"`)
@@ -91,8 +96,8 @@ class Tool {
 
   //生成模板标签
   __label__(id) {
-    let opt = this.opt
-    let tag = opt.labels[id]
+    var opt = this.opt
+    var tag = opt.labels[id]
     return this.__exp__(opt.delimiter[0] + tag + opt.delimiter[1])
   }
 
@@ -213,17 +218,18 @@ class Tool {
   matchInclude(m) {
     let begin = this.__exp__('^' + this.opt.delimiter[0] + 'include\\s+')
     let end = this.__exp__(this.opt.delimiter[1] + '$')
+    var tpl = ''
 
     m = m
       .replace(begin, '')
       .replace(end, '')
       .replace(/^['"]/, '')
       .replace(/['"]$/, '')
-      .replace(/\.tpl$/, '') //去掉可能出现的自带的模板后缀
+      .replace(this.__REG__, '') //去掉可能出现的自带的模板后缀
 
-    m += '.tpl' //统一加上后缀
+    m += this.opt.ext //统一加上后缀
 
-    let tpl = this.__tpl__(m)
+    tpl = this.__readFile__(path.resolve(this.opt.path, m))
     //递归解析include
     tpl = tpl.replace(this.__label__('inc'), m1 => {
       return this.matchInclude(m1)
@@ -274,7 +280,7 @@ class Tool {
 
   // 解析extends标签
   parseExtends(str) {
-    let matches = str.match(/^<!--{extends ([^\\{\\}\\(\\)]*?)}-->/)
+    let matches = str.match(/^<!--{extends ([^\\{\\}\\(\\)]*?)\s*?}-->/)
     if (!matches) {
       str = str
         .replace(this.__label__('blockL'), '')
@@ -293,25 +299,27 @@ class Tool {
       str = matches[1]
         .replace(/^['"]/, '')
         .replace(/['"]$/, '')
-        .replace(/\.tpl$/, '') //去掉可能出现的自带的模板后缀
+        .replace(this.__REG__, '') //去掉可能出现的自带的模板后缀
 
-      str += '.tpl' //统一加上后缀
+      str += this.opt.ext //统一加上后缀
 
-      str = this.__tpl__(str).replace(this.__label__('blockL'), (m, flag) => {
-        flag = flag.trim()
-        return blocks[flag] || ''
-      })
-      blocks = undefined
+      str = this.__readFile__(path.resolve(this.opt.path, str)).replace(
+        this.__label__('blockL'),
+        (m, flag) => {
+          flag = flag.trim()
+          return blocks[flag] || ''
+        }
+      )
     }
     return str
   }
 
   //解析模板
   parse(str, data) {
-    this.vars = `"use strict"; let __filters__ = f; `
+    var vars = `"use strict"; let __filters__ = f; `
     for (let i in data) {
       let tmp = JSON.stringify(data[i]) || ''
-      this.vars += `let ${i} = ${tmp}; `
+      vars += `let ${i} = ${tmp}; `
     }
     str = str
       .trim()
@@ -322,7 +330,7 @@ class Tool {
     str = this.parseExtends(str)
     str = this.parseNormal(str)
 
-    str = `${this.vars} let tpl=\`${str}\`; return tpl;`
+    str = `${vars} let tpl=\`${str}\`; return tpl;`
 
     return new Function('f', str)(this.filters)
   }
diff --git a/package.json b/package.json
index 4bee1fa..afcaa72 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "smartyx",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "nodeJS模板引擎，理念源自于PHP的smarty模板引擎",
   "keywords": ["fivejs", "smarty", "template", "ejs", "jade"],
   "author": "宇天 <yutent@doui.cc>",