Add benchmarks (#254)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

benchmark.js

@@ -0,0 +1,72 @@
+'use strict';
+const Benchmark = require('benchmark');
+const queryString = require('.');
+
+const {stringify, stringifyUrl} = queryString;
+const suite = new Benchmark.Suite();
+
+// Fixtures
+const TEST_OBJECT = {
+	genre: 'Epic fantasy',
+	author: '',
+	page: 2,
+	published: true,
+	symbols: 'πµ',
+	chapters: [1, 2, 3],
+	none: null
+};
+const TEST_HOST = 'https://foo.bar/';
+const TEST_STRING = stringify(TEST_OBJECT);
+const TEST_BRACKETS_STRING = stringify(TEST_OBJECT, {arrayFormat: 'bracket'});
+const TEST_INDEX_STRING = stringify(TEST_OBJECT, {arrayFormat: 'index'});
+const TEST_COMMA_STRING = stringify(TEST_OBJECT, {arrayFormat: 'comma'});
+const TEST_URL = stringifyUrl({url: TEST_HOST, query: TEST_OBJECT});
+
+// Creates a test case and adds it to the suite
+const defineTestCase = (methodName, input, options) => {
+	const fn = queryString[methodName];
+	const label = options ? ` (${stringify(options)})` : '';
+
+	suite.add(methodName + label, () => fn(input, options || {}));
+};
+
+// Define all test cases
+
+// Parse
+defineTestCase('parse', TEST_STRING);
+defineTestCase('parse', TEST_STRING, {parseNumbers: true});
+defineTestCase('parse', TEST_STRING, {parseBooleans: true});
+defineTestCase('parse', TEST_STRING, {sort: false});
+defineTestCase('parse', TEST_STRING, {decode: false});
+defineTestCase('parse', TEST_BRACKETS_STRING, {arrayFormat: 'bracket'});
+defineTestCase('parse', TEST_INDEX_STRING, {arrayFormat: 'index'});
+defineTestCase('parse', TEST_COMMA_STRING, {arrayFormat: 'comma'});
+
+// Stringify
+defineTestCase('stringify', TEST_OBJECT);
+defineTestCase('stringify', TEST_OBJECT, {strict: false});
+defineTestCase('stringify', TEST_OBJECT, {encode: false});
+defineTestCase('stringify', TEST_OBJECT, {skipNull: true});
+defineTestCase('stringify', TEST_OBJECT, {skipEmptyString: true});
+defineTestCase('stringify', TEST_OBJECT, {arrayFormat: 'bracket'});
+defineTestCase('stringify', TEST_OBJECT, {arrayFormat: 'index'});
+defineTestCase('stringify', TEST_OBJECT, {arrayFormat: 'comma'});
+
+// Extract
+defineTestCase('extract', TEST_URL);
+
+// ParseUrl
+defineTestCase('parseUrl', TEST_URL);
+
+// StringifyUrl
+defineTestCase('stringifyUrl', {url: TEST_HOST, query: TEST_OBJECT});
+
+// Log/display the results
+suite.on('cycle', event => {
+	const {name, hz} = event.target;
+	const opsPerSec = Math.round(hz).toLocaleString();
+
+	console.log(name.padEnd(36, '_') + opsPerSec.padStart(12, '_') + ' ops/s');
+});
+
+suite.run();

package.json

@@ -14,6 +14,7 @@
 		"node": ">=6"
 	},
 	"scripts": {
+		"benchmark": "node benchmark.js",
 		"test": "xo && ava && tsd"
 	},
 	"files": [
@@ -36,12 +37,13 @@
 		"searchparams"
 	],
 	"dependencies": {
-		"split-on-first": "^1.0.0",
 		"decode-uri-component": "^0.2.0",
+		"split-on-first": "^1.0.0",
 		"strict-uri-encode": "^2.0.0"
 	},
 	"devDependencies": {
 		"ava": "^1.4.1",
+		"benchmark": "^2.1.4",
 		"deep-equal": "^1.0.1",
 		"fast-check": "^1.5.0",
 		"tsd": "^0.7.3",