gistfile1.txt

~/w/p/phpbench ❯❯❯ ./bin/phpbench run benchmarks/Micro/HashLookupBench.php --revs=1000 --report=aggregate  --iterations=40 --report='extends: aggregate, cols: [ "params", "revs", "its", "mem_peak", "mean", "mode", "rstdev", "diff"]'
PhpBench 0.14-dev (@git_version@). Running benchmarks.
Using configuration file: /home/daniel/www/phpbench/phpbench/phpbench.json.dist

\PhpBench\Benchmarks\Micro\HashBench

    benchLookup                   I39 P0        [μ Mo]/r: 8.864 8.516 (μs)      [μSD μRSD]/r: 1.383μs 15.60%
    benchLookup                   I39 P1        [μ Mo]/r: 9.124 8.661 (μs)      [μSD μRSD]/r: 1.340μs 14.69%
    benchLookup                   I39 P2        [μ Mo]/r: 9.090 8.769 (μs)      [μSD μRSD]/r: 1.418μs 15.60%

1 subjects, 120 iterations, 3,000 revs, 0 rejects
(best [mean mode] worst) = 8.013 [9.026 8.649] 16.384 (μs)
⅀T: 1,083.113μs μSD/r 1.380μs μRSD/r: 15.295%
suite: 133c584d9f23a442098177ff8b614276a95f41b4, date: 2017-01-16, stime: 20:01:11
+-------------------+------+-----+------------+---------+---------+--------+--------+
| params            | revs | its | mem_peak   | mean    | mode    | rstdev | diff   |
+-------------------+------+-----+------------+---------+---------+--------+--------+
| {"algo":"_none_"} | 1000 | 40  | 1,034,968b | 8.864μs | 8.516μs | 15.60% | 0.00%  |
| {"algo":"md5"}    | 1000 | 40  | 931,088b   | 9.124μs | 8.661μs | 14.69% | +2.93% |
| {"algo":"sha1"}   | 1000 | 40  | 931,088b   | 9.090μs | 8.769μs | 15.60% | +2.55% |
+-------------------+------+-----+------------+---------+---------+--------+--------+

HashLookupBench.php

<?php

namespace PhpBench\Benchmarks\Micro;

class HashBench
{
    private $hashes = [];
    private $hashKeys = [];

    public function generateHashes($params)
    {
        $ret = [];
        $size = 1000;
        $nbHashes = 100;

        for ($i = 0; $i < $nbHashes; $i++) {
            $data = '';
            for ($ii = 0; $ii < $size; $ii++) {
                $data .= chr(rand(47, 127));
            }

            if ('_none_' === $params['algo']) {
                $this->hashes[$data] = 'hello';
                continue;
            }

            $this->hashes[hash($params['algo'], $data)] = 'hello';
        }

        $this->hashKeys = array_keys($this->hashes);
    }

    /**
     * @ParamProviders({"provideAlgos"})
     * @BeforeMethods({"generateHashes"})
     */
    public function benchLookup($params)
    {
        foreach ($this->hashKeys as $key) {
            $this->hashes[$key];
        }
    }

    public function provideAlgos()
    {
        return [
            [
                'algo' => '_none_',
            ],
            [
                'algo' => 'md5',
            ],
            [
                'algo' => 'sha1'
            ],
        ];
    }
}