{
    "schema_version": 1,
    "license": "CC BY 4.0",
    "citation": "Kuzeyhan Demir, ASAMB, Parsing timestamp strings with strtotime and DateTimeImmutable, measurement run 2026-07-22T15:23:56+00:00",
    "environment": {
        "generated_at": "2026-07-22T15:23:56+00:00",
        "php_version": "8.4.23",
        "php_sapi": "cli",
        "os": "Linux 4.18.0-553.85.1.el8_10.x86_64",
        "architecture": "x86_64",
        "cpu": "AMD EPYC-Rome Processor",
        "memory": "15.02 GiB host total",
        "opcache_cli": "0",
        "memory_limit": "1024M",
        "extensions": [
            "json",
            "openssl",
            "zlib",
            "mbstring",
            "pdo_sqlite"
        ],
        "timezone": "UTC",
        "clock": "hrtime(true)",
        "rounds": 7
    },
    "study": {
        "slug": "date-parsing",
        "iterations_per_sample": 20,
        "rounds": 7,
        "winner": "strtotime",
        "slowest": "DateTimeImmutable",
        "spread_percent": 15.69,
        "variants": {
            "strtotime": {
                "median_ns_per_op": 880153.55,
                "p25_ns_per_op": 873586.45,
                "p75_ns_per_op": 884418.28,
                "ops_per_second": 1136.17,
                "samples_ns_per_op": [
                    884547.25,
                    880153.55,
                    875973.7,
                    898564.1,
                    884289.3,
                    871199.2,
                    870301.5
                ],
                "extra": []
            },
            "DateTimeImmutable": {
                "median_ns_per_op": 1018260.55,
                "p25_ns_per_op": 1015105.35,
                "p75_ns_per_op": 1047175.88,
                "ops_per_second": 982.07,
                "samples_ns_per_op": [
                    1018260.55,
                    1069752.8,
                    1007728.75,
                    1052809,
                    1016579.4,
                    1013631.3,
                    1041542.75
                ],
                "extra": []
            }
        }
    }
}