Add phpbench

Signed-off-by: William Desportes <williamdes@wdes.fr>

Author: williamdes

composer.json

@@ -27,6 +27,7 @@
         "symfony/polyfill-php80": "^1.16"
     },
     "require-dev": {
+        "phpbench/phpbench": "^1.1",
         "phpmyadmin/coding-standard": "^3.0",
         "phpmyadmin/motranslator": "^4.0 || ^5.0",
         "phpstan/extension-installer": "^1.1",
@@ -66,6 +67,7 @@
         "phpstan": "@php phpstan analyse",
         "psalm": "@php psalm --no-diff",
         "phpunit": "@php phpunit --color=always",
+        "phpbench": "@php phpbench run tests/benchmarks --report=aggregate --progress=dots",
         "test": [
             "@phpcs",
             "@phpstan",

phpbench.json

@@ -0,0 +1,4 @@
+{
+    "$schema": "./vendor/phpbench/phpbench/phpbench.schema.json",
+    "runner.bootstrap": "vendor/autoload.php"
+}

tests/benchmarks/UtfStringBench.php

@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin\SqlParser\Tests\benchmarks;
+
+use PhpMyAdmin\SqlParser\UtfString;
+
+use function chr;
+use function file_get_contents;
+
+class UtfStringBench
+{
+    /** @var string */
+    private $testContents;
+
+    /**
+     * @BeforeMethods("setUp")
+     * @Iterations(20)
+     * @Revs(4)
+     * @OutputTimeUnit("milliseconds")
+     * @Assert("mode(variant.time.avg) < 38 milliseconds +/- 10%")
+     * @Assert("mode(variant.time.avg) > 20 milliseconds +/- 10%")
+     */
+    public function benchBuildUtfString(): void
+    {
+        $str1 = new UtfString($this->testContents);
+        for ($i = 0; $i < $str1->length(); $i++) {
+            $str1[$i];// Make offset offsetGet work
+        }
+    }
+
+    /**
+     * @BeforeMethods("setUp")
+     * @Iterations(2)
+     * @Revs(2)
+     * @OutputTimeUnit("microseconds")
+     * @Assert("mode(variant.time.avg) < 75 microseconds +/- 10%")
+     * @Assert("mode(variant.time.avg) > 60 microseconds +/- 10%")
+     */
+    public function benchGetCharLength(): void
+    {
+        UtfString::getCharLength(chr(0x00)); // 00000000
+        UtfString::getCharLength(chr(0x7F)); // 01111111
+
+        UtfString::getCharLength(chr(0xC0)); // 11000000
+        UtfString::getCharLength(chr(0xDF)); // 11011111
+
+        UtfString::getCharLength(chr(0xE0)); // 11100000
+        UtfString::getCharLength(chr(0xEF)); // 11101111
+
+        UtfString::getCharLength(chr(0xF0)); // 11110000
+        UtfString::getCharLength(chr(0xF7)); // 11110111
+
+        UtfString::getCharLength(chr(0xF8)); // 11111000
+        UtfString::getCharLength(chr(0xFB)); // 11111011
+
+        UtfString::getCharLength(chr(0xFC)); // 11111100
+        UtfString::getCharLength(chr(0xFD)); // 11111101
+    }
+
+    public function setUp(): void
+    {
+        $contentsPath = __DIR__ . '/../../LICENSE.txt';
+        $this->testContents = (string) file_get_contents($contentsPath);
+    }
+}