Hashing

Console Output

This hashing benchmark accepts two parameter sources: one for algorithms and the other for the size of the string to hash.

Parameters from different providers are combined into a cartesian product, meaning that each algorithm will be combined with each size.

/**
 * @BeforeMethods("setUp")
 */
class HashingBench
{
    /**
     * @var string
     */
    private $string = '';

    public function setUp(array $params): void
    {
        $this->string = str_repeat('X', $params['size']);
    }

    /**
     * @ParamProviders({
     *     "provideAlgos",
     *     "provideStringSize"
     * })
     */
    public function benchAlgos($params): void
    {
        hash($params['algo'], $this->string);
    }

    public function provideAlgos()
    {
        foreach (array_slice(\hash_algos(), 0, 20) as $algo) {
            if ($algo === 'md2') { // md2 is in a different performance category
                continue;
            }
            yield ['algo' => $algo];
        }

    }

    public function provideStringSize() {
        yield ['size' => 10];
        yield ['size' => 100];
        yield ['size' => 1000];
    }

}

You can configure a bar chart report grouping both by size and algorithm:

{
    "report.generators": {
        "hashing": {
            "title": "Hashing algorithm comparison",
            "description": "Compares algorithms for different string sizes",
            "generator": "component",
            "filter": "benchmark_name = 'HashingBench'",
            "components": [
                {
                    "component": "bar_chart_aggregate",
                    "x_partition": "'Size: ' ~ variant_params['size']",
                    "bar_partition": "variant_params['algo']",
                    "y_expr": "mode(partition['result_time_avg']) as time",
                    "y_axes_label": "yValue as time"
                }
            ]
        }
    }
}