perf(tag/helper): memoize

lib/plugins/helper/css.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const { htmlTag, url_for } = require('hexo-util');
+const { default: moize } = require('moize');
 
 const flatten = function(arr, result = []) {
   for (const i in arr) {
@@ -35,4 +36,7 @@ function cssHelper(...args) {
   return result;
 }
 
-module.exports = cssHelper;
+module.exports = moize(cssHelper, {
+  maxSize: 10,
+  isDeepEqual: true
+});

lib/plugins/helper/date.js

@@ -2,6 +2,7 @@
 
 const moment = require('moment-timezone');
 const { isMoment } = moment;
+const { default: moize } = require('moize');
 
 const isDate = value =>
   typeof value === 'object' && value instanceof Date && !isNaN(value.getTime());
@@ -93,4 +94,4 @@ exports.full_date = fullDateHelper;
 exports.relative_date = relativeDateHelper;
 exports.time_tag = timeTagHelper;
 exports.moment = moment;
-exports.toMomentLocale = toMomentLocale;
+exports.toMomentLocale = moize.shallow(toMomentLocale);

lib/plugins/helper/feed_tag.js

@@ -1,15 +1,15 @@
 'use strict';
 
 const { url_for } = require('hexo-util');
+const { default: moize } = require('moize');
 
 const feedFn = (str = '') => {
   if (str) return str.replace(/2$/, '');
   return str;
 };
 
-function feedTagHelper(path, options = {}) {
-  const { config } = this;
-  const title = options.title || config.title;
+function makeFeedTag(path, options = {}, configFeed, configTitle) {
+  const title = options.title || configTitle;
 
   if (path) {
     if (typeof path !== 'string') throw new TypeError('path must be a string!');
@@ -26,16 +26,15 @@ function feedTagHelper(path, options = {}) {
     return `<link rel="alternate" href="${url_for.call(this, path)}" title="${title}" ${typeAttr}>`;
   }
 
-  if (config.feed) {
-    const { feed } = config;
-    if (feed.type && feed.path) {
-      if (typeof feed.type === 'string') {
-        return `<link rel="alternate" href="${url_for.call(this, feed.path)}" title="${title}" type="application/${feedFn(feed.type)}+xml">`;
+  if (configFeed) {
+    if (configFeed.type && configFeed.path) {
+      if (typeof configFeed.type === 'string') {
+        return `<link rel="alternate" href="${url_for.call(this, configFeed.path)}" title="${title}" type="application/${feedFn(configFeed.type)}+xml">`;
       }
 
       let result = '';
-      for (const i in feed.type) {
-        result += `<link rel="alternate" href="${url_for.call(this, feed.path[i])}" title="${title}" type="application/${feedFn(feed.type[i])}+xml">`;
+      for (const i in configFeed.type) {
+        result += `<link rel="alternate" href="${url_for.call(this, configFeed.path[i])}" title="${title}" type="application/${feedFn(configFeed.type[i])}+xml">`;
       }
       return result;
     }
@@ -44,4 +43,9 @@ function feedTagHelper(path, options = {}) {
   return '';
 }
 
+function feedTagHelper(path, options = {}) {
+  const { config } = this;
+  return moize.deep(makeFeedTag.bind(this))(path, options, config.feed, config.title);
+}
+
 module.exports = feedTagHelper;

lib/plugins/helper/js.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const { htmlTag, url_for } = require('hexo-util');
+const { default: moize } = require('moize');
 
 /* flatten() to be replaced by Array.flat()
 after Node 10 has reached EOL */
@@ -37,4 +38,7 @@ function jsHelper(...args) {
   return result;
 }
 
-module.exports = jsHelper;
+module.exports = moize(jsHelper, {
+  maxSize: 10,
+  isDeepEqual: true
+});

lib/plugins/helper/list_tags.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const { url_for, escapeHTML } = require('hexo-util');
+const { default: moize } = require('moize');
 
 function listTagsHelper(tags, options) {
   if (!options && (!tags || !Object.prototype.hasOwnProperty.call(tags, 'length'))) {
@@ -92,4 +93,21 @@ function listTagsHelper(tags, options) {
   return result;
 }
 
-module.exports = listTagsHelper;
+function listTagsHelperFactory(tags, options) {
+  const transformArgs = () => {
+    if (!options && (!tags || !Object.prototype.hasOwnProperty.call(tags, 'length'))) {
+      options = tags;
+      tags = this.site.tags;
+    }
+
+    return [tags.toArray(), options];
+  };
+
+  return moize(listTagsHelper.bind(this), {
+    maxSize: 5,
+    isDeepEqual: true,
+    transformArgs
+  }).call(this, tags, options);
+}
+
+module.exports = listTagsHelperFactory;

lib/plugins/helper/mail_to.js

@@ -2,6 +2,7 @@
 
 const { htmlTag } = require('hexo-util');
 const qs = require('querystring');
+const { default: moize } = require('moize');
 
 function mailToHelper(path, text, options = {}) {
   if (Array.isArray(path)) path = path.join(',');
@@ -33,4 +34,4 @@ function mailToHelper(path, text, options = {}) {
   return htmlTag('a', attrs, text);
 }
 
-module.exports = mailToHelper;
+module.exports = moize.deep(mailToHelper);

lib/plugins/helper/open_graph.js

@@ -2,7 +2,8 @@
 
 const { parse, resolve } = require('url');
 const { isMoment, isDate } = require('moment');
-const { encodeURL, prettyUrls, htmlTag, stripHTML, escapeHTML, Cache } = require('hexo-util');
+const { encodeURL, prettyUrls, htmlTag, stripHTML, escapeHTML } = require('hexo-util');
+const { default: moize } = require('moize');
 
 const localeMap = {
   'en': 'en_US',
@@ -20,8 +21,8 @@ const localeMap = {
   'tr': 'tr_TR',
   'vi': 'vi_VN'
 };
-const localeCache = new Cache();
-const localeToTerritory = str => localeCache.apply(str, () => {
+
+const localeToTerritory = moize.shallow(str => {
   if (str.length === 2 && localeMap[str]) return localeMap[str];
 
   if (str.length === 5) {

lib/plugins/helper/search_form.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const { default: moize } = require('moize');
+
 function searchFormHelper(options = {}) {
   const { config } = this;
   const className = options.class || 'search-form';
@@ -8,4 +10,4 @@ function searchFormHelper(options = {}) {
   return `<form action="//google.com/search" method="get" accept-charset="UTF-8" class="${className}"><input type="search" name="q" class="${className}-input"${text ? ` placeholder="${text}"` : ''}>${button ? `<button type="submit" class="${className}-submit">${typeof button === 'string' ? button : text}</button>` : ''}<input type="hidden" name="sitesearch" value="${config.url}"></form>`;
 }
 
-module.exports = searchFormHelper;
+module.exports = moize.deep(searchFormHelper);

lib/plugins/helper/tagcloud.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const { Color, url_for } = require('hexo-util');
+const { default: moize } = require('moize');
 
 function tagcloudHelper(tags, options) {
   if (!options && (!tags || !Object.prototype.hasOwnProperty.call(tags, 'length'))) {
@@ -74,4 +75,21 @@ function tagcloudHelper(tags, options) {
   return result.join(separator);
 }
 
-module.exports = tagcloudHelper;
+function tagcloudHelperFactory(tags, options) {
+  const transformArgs = () => {
+    if (!options && (!tags || !Object.prototype.hasOwnProperty.call(tags, 'length'))) {
+      options = tags;
+      tags = this.site.tags;
+    }
+
+    return [tags.toArray(), options];
+  };
+
+  return moize(tagcloudHelper.bind(this), {
+    maxSize: 5,
+    isDeepEqual: true,
+    transformArgs
+  }).call(this, tags, options);
+}
+
+module.exports = tagcloudHelperFactory;

lib/plugins/tag/index.js

@@ -1,5 +1,7 @@
 'use strict';
 
+const { default: moize } = require('moize');
+
 module.exports = ctx => {
   const { tag } = ctx.extend;
 
@@ -52,3 +54,25 @@ module.exports = ctx => {
 
   tag.register('youtube', require('./youtube'));
 };
+
+// Use WeakMap to track different ctx (in case there is any)
+const moized = new WeakMap();
+
+module.exports.postFindOneFactory = function postFindOneFactory(ctx) {
+  if (moized.has(ctx)) {
+    return moized.get(ctx);
+  }
+
+  const moizedPostFindOne = moize(createPostFindOne(ctx), {
+    isDeepEqual: true,
+    maxSize: 20
+  });
+  moized.set(ctx, moizedPostFindOne);
+
+  return moizedPostFindOne;
+};
+
+function createPostFindOne(ctx) {
+  const Post = ctx.model('Post');
+  return Post.findOne.bind(Post);
+}

lib/plugins/tag/post_link.js

@@ -2,6 +2,7 @@
 
 const { encodeURL, escapeHTML } = require('hexo-util');
 const { resolve } = require('url');
+const { postFindOneFactory } = require('./');
 
 /**
  * Post link tag
@@ -10,8 +11,6 @@ const { resolve } = require('url');
  *   {% post_link slug [title] [escape] %}
  */
 module.exports = ctx => {
-  const Post = ctx.model('Post');
-
   return function postLinkTag(args) {
     const error = `<a href="#">Post not found: ${args.join(' ') || 'Invalid post_link'}</a>`;
     const slug = args.shift();
@@ -24,7 +23,7 @@ module.exports = ctx => {
       escape = 'true';
     }
 
-    const post = Post.findOne({slug});
+    const post = postFindOneFactory(ctx)({ slug });
     if (!post) return error;
 
     let title = args.length ? args.join(' ') : post.title;

lib/plugins/tag/post_path.js

@@ -2,6 +2,7 @@
 
 const { resolve } = require('url');
 const { encodeURL } = require('hexo-util');
+const { postFindOneFactory } = require('./');
 
 /**
  * Post path tag
@@ -10,13 +11,11 @@ const { encodeURL } = require('hexo-util');
  *   {% post_path slug %}
  */
 module.exports = ctx => {
-  const Post = ctx.model('Post');
-
   return function postPathTag(args) {
     const slug = args.shift();
     if (!slug) return;
 
-    const post = Post.findOne({slug});
+    const post = postFindOneFactory(ctx)({ slug });
     if (!post) return;
 
     const link = encodeURL(resolve(ctx.config.root, post.path));

package.json

@@ -50,6 +50,7 @@
     "hexo-util": "^2.4.0",
     "js-yaml": "^4.0.0",
     "micromatch": "^4.0.2",
+    "moize": "^6.1.0",
     "moment": "^2.22.2",
     "moment-timezone": "^0.5.21",
     "nanocolors": "^0.2.12",