Add vitest benchmark (#583)

* add basic benches

* add package.json script

* fix header

* add codspeed plugin

* add benchmark GitHub action

* add env

* revert change

* merge upstream

* update names

2 files changed, 147 insertions, 0 deletions

diff --git a/benches/jsconfig.json b/benches/jsconfig.json
new file mode 100644
index 00000000..8b821d68
--- /dev/null
+++ b/benches/jsconfig.json
@@ -0,0 +1,43 @@
+{
+    "compilerOptions": {
+        "module": "ES2022",
+        "target": "ES2022",
+        "checkJs": true,
+        "moduleResolution": "node",
+        "strict": true,
+        "strictNullChecks": true,
+        "noImplicitAny": true,
+        "strictPropertyInitialization": true,
+        "suppressImplicitAnyIndexErrors": false,
+        "skipLibCheck": false,
+        "baseUrl": ".",
+        "paths": {
+            "*": ["../types/ext/*"],
+            "dev/*": ["../types/dev/*"],
+            "benches/*": ["../types/benches/*"],
+            "rollup/parseAst": ["../types/other/rollup-parse-ast"],
+            "ext/json-schema": ["../types/ext/json-schema"],
+            "json-schema": ["json-schema"]
+        },
+        "types": [
+            "chrome",
+            "firefox-webext-browser",
+            "handlebars",
+            "jszip",
+            "parse5",
+            "wanakana"
+        ]
+    },
+    "include": [
+        "**/*.js",
+        "../ext/**/*.js",
+        "../types/ext/**/*.ts",
+        "../types/dev/**/*.ts",
+        "../types/benches/**/*.ts",
+        "../types/other/globals.d.ts"
+    ],
+    "exclude": [
+        "../node_modules",
+        "../dev/lib"
+    ]
+}
diff --git a/benches/language-transformer.bench.js b/benches/language-transformer.bench.js
new file mode 100644
index 00000000..9d312fb7
--- /dev/null
+++ b/benches/language-transformer.bench.js
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2023-2024  Yomitan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import fs from 'fs';
+import {fileURLToPath} from 'node:url';
+import path from 'path';
+import {bench, describe} from 'vitest';
+import {parseJson} from '../dev/json.js';
+import {LanguageTransformer} from '../ext/js/language/language-transformer.js';
+
+const dirname = path.dirname(fileURLToPath(import.meta.url));
+
+/** @type {import('language-transformer').LanguageTransformDescriptor} */
+const descriptor = parseJson(fs.readFileSync(path.join(dirname, '..', 'ext', 'data/language/japanese-transforms.json'), {encoding: 'utf8'}));
+const languageTransformer = new LanguageTransformer();
+languageTransformer.addDescriptor(descriptor);
+
+describe('Language transformer basic tests', () => {
+    const adjectiveInflections = [
+        '愛しい',
+        '愛しそう',
+        '愛しすぎる',
+        '愛しかったら',
+        '愛しかったり',
+        '愛しくて',
+        '愛しく',
+        '愛しくない',
+        '愛しさ',
+        '愛しかった',
+        '愛しくありません',
+        '愛しくありませんでした',
+        '愛しき'
+    ];
+
+    const verbInflections = [
+        '食べる',
+        '食べます',
+        '食べた',
+        '食べました',
+        '食べて',
+        '食べられる',
+        '食べられる',
+        '食べさせる',
+        '食べさせられる',
+        '食べろ',
+        '食べない',
+        '食べません',
+        '食べなかった',
+        '食べませんでした',
+        '食べなくて',
+        '食べられない',
+        '食べられない',
+        '食べさせない',
+        '食べさせられない',
+        '食べ',
+        '食べれば',
+        '食べちゃう',
+        '食べちまう',
+        '食べなさい',
+        '食べそう',
+        '食べすぎる',
+        '食べたい',
+        '食べたら',
+        '食べたり',
+        '食べず',
+        '食べぬ',
+        '食べ',
+        '食べましょう',
+        '食べよう',
+        '食べとく',
+        '食べている',
+        '食べておる',
+        '食べてる',
+        '食べとる',
+        '食べてしまう'
+    ];
+
+    const inflectionCombinations = [
+        '抱き抱えていなければ',
+        '抱きかかえていなければ',
+        '打ち込んでいませんでした',
+        '食べさせられたくなかった'
+    ];
+
+    bench('transformations', () => {
+        for (const transform of [...adjectiveInflections, ...verbInflections, ...inflectionCombinations]) {
+            languageTransformer.transform(transform);
+        }
+    });
+});