phpbench.json

{
    "$schema": "./vendor/phpbench/phpbench/phpbench.schema.json",
    "runner.bootstrap": "vendor/autoload.php",
    "runner.path": "tests/Benchmark",
    "report.generators": {
        "default": {
            "generator": "expression",
            "cols": [
                "name",
                "unit",
                "value",
                "range",
                "extra"
            ],
            "expressions": {
                "name": "format('%s::%s%s', first(benchmark_name),first(subject_name),if(first(variant_name) != false, format(' (%s)', first(variant_name)), ''))",
                "unit": "time_unit(first(subject_time_unit), true)",
                "value": "time_convert(mode(result_time_avg), null, time_unit(first(subject_time_unit)))",
                "range": "format('± %.2f%%', rstdev(result_time_avg))",
                "extra": "format('%d iterations, %d revs', first(variant_iterations), first(variant_revs))"
            },
            "aggregate": [
                "suite_tag",
                "benchmark_class",
                "subject_name",
                "variant_index"
            ]
        }
    }
}