Add parts cache

lib/cache.js

@@ -0,0 +1,35 @@
+var crypto = require('crypto')
+
+var Cache = function() {
+	this.cache = {}
+}
+
+Cache.prototype.check = function(key, source) {
+	var cache = this.cache[key],
+		checksum = hash(source)
+
+	if(cache && cache.checksum === checksum) {
+		return false
+	}
+
+	return checksum
+}
+
+Cache.prototype.get = function(key) {
+	return this.cache[key]
+}
+
+Cache.prototype.set = function(key, checksum, data) {
+	return this.cache[key] = {
+		checksum: checksum,
+		data: data
+	}
+}
+
+function hash(str) {
+	var hash = crypto.createHash('md5')
+	hash.update(str)
+	return hash.digest('hex')
+}
+
+module.exports = new Cache()

lib/compiler.js

@@ -12,6 +12,7 @@ var chalk = require('chalk')
 var assign = require('object-assign')
 var deindent = require('de-indent')
 var Emitter = require('events').EventEmitter
+var cache = require('./cache')
 
 var htmlMinifyOptions = {
   collapseWhitespace: true,
@@ -208,6 +209,7 @@ function processTemplate (node, filePath, id, hasScopedStyle, fullSource) {
       ? getRawTemplate(node, fullSource) // custom template, extract as raw string
       : parse5.serialize(node.content) // normal HTML, use serialization
   )
+
   template = deindent(template)
   if (!lang) {
     var warnings = validateTemplate(node.content, fullSource)
@@ -265,11 +267,12 @@ function getRawTemplate (node, source) {
 function processStyle (node, filePath, id) {
   var style = checkSrc(node, filePath) || parse5.serialize(node)
   var lang = checkLang(node)
+
   style = deindent(style)
   return compileAsPromise('style', style, lang, filePath)
     .then(function (res) {
       return rewriteStyle(id, res.source, isScoped(node))
-    })
+    });
 }
 
 /**
@@ -284,15 +287,29 @@ function processStyle (node, filePath, id) {
 function processScript (node, filePath, content) {
   var lang = checkLang(node) || 'babel'
   var script = checkSrc(node, filePath)
+  var key = filePath + ':script'
+
   if (!script) {
     script = parse5.serialize(node)
     // pad the script to ensure correct line number for syntax errors
     var location = content.indexOf(script)
     var before = padContent(content.slice(0, location))
     script = before + script
   }
+
+  script = script.trimLeft()
+  var checksum = cache.check(key, script)
+
+  if (!checksum) {
+    return cache.get(key).data
+  }
+
   script = deindent(script)
   return compileAsPromise('script', script, lang, filePath)
+    .then(function(data) {
+      cache.set(key, checksum, data)
+      return data
+    })
 }
 
 /**