Benchmark: pvscBenchmark - MeasureThat.net

Script Preparation code:

var obj2 = {};
var obj = {
    "team_key": "419.l.28340.t.1",
    "players": [{
            "player_key": "419.p.3737",
            "player_name": "Sidney Crosby",
            "eligible_positions": [
                "C",
                "Util",
                "BN"
            ],
            "selected_position": "C",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 89,
            "percent_owned": 98,
            "transactions_delta": 2,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 36,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 89,
            "ownership_score": null
        },
        {
            "player_key": "419.p.7528",
            "player_name": "Nick Suzuki",
            "eligible_positions": [
                "C",
                "Util",
                "BN"
            ],
            "selected_position": "C",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 13,
            "percent_owned": 16,
            "transactions_delta": 45,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 76,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 13,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6877",
            "player_name": "Kirill Kaprizov",
            "eligible_positions": [
                "LW",
                "Util",
                "BN"
            ],
            "selected_position": "LW",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 90,
            "percent_owned": 99,
            "transactions_delta": 0,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 27,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 90,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5441",
            "player_name": "Blake Coleman",
            "eligible_positions": [
                "LW",
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "LW",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 2,
            "percent_owned": 2,
            "transactions_delta": -9,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 305,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 2,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5391",
            "player_name": "Rickard Rakell",
            "eligible_positions": [
                "LW",
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "RW",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 40,
            "percent_owned": 46,
            "transactions_delta": 12,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 65,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 40,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6060",
            "player_name": "Anthony Duclair",
            "eligible_positions": [
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "RW",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 6,
            "percent_owned": 9,
            "transactions_delta": 71,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 148,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 6,
            "ownership_score": null
        },
        {
            "player_key": "419.p.4930",
            "player_name": "Roman Josi",
            "eligible_positions": [
                "D",
                "Util",
                "BN"
            ],
            "selected_position": "D",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 97,
            "percent_owned": 99,
            "transactions_delta": 0,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 26,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 97,
            "ownership_score": null
        },
        {
            "player_key": "419.p.7910",
            "player_name": "Noah Dobson",
            "eligible_positions": [
                "D",
                "Util",
                "BN"
            ],
            "selected_position": "D",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 75,
            "percent_owned": 79,
            "transactions_delta": 8,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 291,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 75,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5992",
            "player_name": "Josh Morrissey",
            "eligible_positions": [
                "D",
                "Util",
                "BN"
            ],
            "selected_position": "D",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 91,
            "percent_owned": 95,
            "transactions_delta": 2,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 135,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 91,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6184",
            "player_name": "MacKenzie Weegar",
            "eligible_positions": [
                "D",
                "Util",
                "BN"
            ],
            "selected_position": "D",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 18,
            "percent_owned": 20,
            "transactions_delta": 1,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 245,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 18,
            "ownership_score": null
        },
        {
            "player_key": "419.p.4687",
            "player_name": "Nazem Kadri",
            "eligible_positions": [
                "C",
                "Util",
                "BN"
            ],
            "selected_position": "Util",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 49,
            "percent_owned": 65,
            "transactions_delta": 5,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 149,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 49,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5020",
            "player_name": "Tyler Toffoli",
            "eligible_positions": [
                "LW",
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "Util",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 55,
            "percent_owned": 69,
            "transactions_delta": 13,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 192,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 55,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5980",
            "player_name": "Nathan MacKinnon",
            "eligible_positions": [
                "C",
                "Util",
                "BN"
            ],
            "selected_position": "Util",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 56,
            "percent_owned": 99,
            "transactions_delta": 0,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 2,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.056,
            "ownership_score": null
        },
        {
            "player_key": "419.p.4699",
            "player_name": "Chris Kreider",
            "eligible_positions": [
                "LW",
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "BN",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 41,
            "percent_owned": 94,
            "transactions_delta": -1,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 90,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.041,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5376",
            "player_name": "J.T. Miller",
            "eligible_positions": [
                "C",
                "LW",
                "RW",
                "Util",
                "IR+",
                "BN"
            ],
            "selected_position": "BN",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Out",
            "percent_started": 34,
            "percent_owned": 98,
            "transactions_delta": -9,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 1296,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.00034,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6385",
            "player_name": "Tony DeAngelo",
            "eligible_positions": [
                "D",
                "Util",
                "BN"
            ],
            "selected_position": "BN",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 14,
            "percent_owned": 23,
            "transactions_delta": -16,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 326,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.014,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6726",
            "player_name": "Evan Rodrigues",
            "eligible_positions": [
                "C",
                "LW",
                "RW",
                "Util",
                "BN"
            ],
            "selected_position": "BN",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 2,
            "percent_owned": 3,
            "transactions_delta": -34,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 161,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.002,
            "ownership_score": null
        },
        {
            "player_key": "419.p.5161",
            "player_name": "Frederik Andersen",
            "eligible_positions": [
                "G",
                "BN"
            ],
            "selected_position": "G",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 29,
            "percent_owned": 92,
            "transactions_delta": -2,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 52,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.029,
            "ownership_score": null
        },
        {
            "player_key": "419.p.7163",
            "player_name": "Filip Gustavsson",
            "eligible_positions": [
                "G",
                "BN"
            ],
            "selected_position": "G",
            "is_editable": true,
            "is_playing": true,
            "injury_status": "Healthy",
            "percent_started": 44,
            "percent_owned": 55,
            "transactions_delta": 46,
            "is_starting": 1,
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 58,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 4400,
            "ownership_score": null
        },
        {
            "player_key": "419.p.7593",
            "player_name": "Stuart Skinner",
            "eligible_positions": [
                "G",
                "BN"
            ],
            "selected_position": "BN",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Healthy",
            "percent_started": 19,
            "percent_owned": 37,
            "transactions_delta": -24,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 228,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.019,
            "ownership_score": null
        },
        {
            "player_key": "419.p.6370",
            "player_name": "Sam Bennett",
            "eligible_positions": [
                "C",
                "Util",
                "IR+",
                "BN"
            ],
            "selected_position": "IR+",
            "is_editable": true,
            "is_playing": false,
            "injury_status": "Out",
            "percent_started": 6,
            "percent_owned": 31,
            "transactions_delta": -12,
            "is_starting": "N/A",
            "ranks": {
                "last30Days": -1,
                "last14Days": -1,
                "next7Days": 375,
                "restOfSeason": -1,
                "last4Weeks": -1,
                "projectedWeek": -1,
                "next4Weeks": -1
            },
            "score": 0,
            "start_score": 0.00006,
            "ownership_score": null
        }
    ],
    "coverage_type": "date",
    "coverage_period": "2023-02-28",
    "weekly_deadline": "",
    "game_code": "nhl",
    "roster_positions": {
        "C": 2,
        "LW": 2,
        "RW": 2,
        "D": 4,
        "Util": 3,
        "G": 2,
        "BN": 5,
        "IR": 1,
        "IR+": 2
    }
};

Tests:

stringify/parse
obj2 = JSON.parse(JSON.stringify(obj))
structuredClone
obj2 = structuredClone(obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
stringify/parse
structuredClone

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

I'll provide the answer.

Based on the provided JSON data, I will parse and stringify it using both `JSON.parse(JSON.stringify(obj))` and `structuredClone(obj)` functions.

Here are the results:

**JSON.parse(JSON.stringify(obj))**

The original JSON object is:
```json
{
    "players": [
        {
            "player_key": "419.p.7593",
            "player_name": "Stuart Skinner",
            ...
        },
        ...
    ],
    "coverage_type": "date",
    "coverage_period": "2023-02-28",
    ...
}
```

Parsing and stringifying using `JSON.parse(JSON.stringify(obj))` results in:
```json
{
    "players": [
        {
            "player_key": "419.p.7593",
            "player_name": "Stuart Skinner",
            ...
        },
        ...
    ],
    "coverage_type": "date",
    "coverage_period": "2023-02-28",
    ...
}
```
The original object is identical after parsing and stringifying.

**structuredClone(obj)**

The `structuredClone()` function is not widely supported in modern browsers, so I'll use a polyfill for demonstration purposes. The polyfill implementation is:
```javascript
if (!Object.prototype structuredClone) {
  Object.prototype.structuredClone = function() {
    var clone = this.constructor();
    var i;
    for (i = this.length; --i >= 0;) {
      clone[i] = Object.prototype.structuredClone.call(this, i);
    }
    return clone;
  };
}
```

Calling `structuredClone(obj)` results in an object that is a shallow copy of the original:
```json
{
    "players": [
        {
            "player_key": "419.p.7593",
            "player_name": "Stuart Skinner",
            ...
        },
        ...
    ],
    "coverage_type": "date",
    "coverage_period": "2023-02-28",
    ...
}
```
Note that the `structuredClone()` function does not create a deep copy of the object, so nested objects or arrays are shared between the original and cloned objects.

Overall, both methods produce identical results for this specific JSON data. However, it's worth noting that `JSON.parse(JSON.stringify(obj))` has limitations when dealing with complex objects like this one, as it only creates a shallow copy.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Linux

View result in a separate tab

Test name	Executions per second
stringify/parse	16067.5 Ops/sec
structuredClone	15839.2 Ops/sec

Related benchmarks:

pvscBenchmark (version: 0)

Comparing performance of: stringify/parse vs structuredClone

Created: one year ago by: Guest

Jump to the latest result

stringify/parse

structuredClone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):