Add comprehensive benchmark script

[xHeaven]

Usage

php benchmark.php

Outputs per-language stats (avg, p50, p95, min, max).

Extending

Add a new language fixture by adding a static method to FixtureProvider and register it in all().
For example:

public static function python(): string
{
    return <<<'PYTHON'
    import os
    # ... python code to benchmark
    PYTHON;
}
public static function all(): array
{
    return [
        // ... other languages
        'python' => self::python(),
    ];
}

Other

You can finetune the iteration and warmup count at the bottom of the script.

[coveralls]

Pull Request Test Coverage Report for Build 21861270396

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.881%

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Totals
Change from base Build 21860645768:	0.0%
Covered Lines:	1657
Relevant Lines:	1784

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💛 - Coveralls