Benchmark: TestISOvsConcat - MeasureThat.net

Script Preparation code:

var date = new Date();

function toISOString(date) {
	return date.toISOString().substr(0, 10);
}

function concat(date) {
    var ms = date.getMilliseconds();
   	var s = date.getSeconds();
   	var M = date.getMinutes();
   	var h = date.getHours();
 	var d = date.getDate();
	var m = date.getMonth() + 1;
	var y = date.getFullYear();
    var second = s <= 9 ? '0' + s : '' + s;
    var minute = M <= 9 ? '0' + M : '' + M;
    var hour = h <= 9 ? '0' + h : '' + h;
    var day = d <= 9 ? '0' + d : '' + d;
    var month = m <= 9 ? '0' + m : '' + m;
    var year = '' + y;
	return day + '-' + month + '-' + year + 'T' + hour + ':' + minute + ':' + second + '.' + ms;
}

Tests:

1
for (var i=0; i<10000; ++i) { toISOString(date); }
2
for (var i=0; i<10000; ++i) { concat(date); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
1	186.8 Ops/sec
2	604.6 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark is designed to compare the performance of two JavaScript methods for converting a Date object to an ISO string format: `toISOString()` and `concat()`. The benchmark measures how many executions per second (ExecutionsPerSecond) each method can handle on a specific device platform (Desktop, in this case).

**Benchmark Definition**

The benchmark definition consists of two test cases:

1. **TestISOvsConcat**: This is the main benchmark that runs both `toISOString()` and `concat()` methods.
2. **Individual test cases**: These are smaller benchmarks that run each method individually.

**Methods Compared:**

*   `toISOString(date)`: A built-in JavaScript method that converts a Date object to an ISO string format.
*   `concat(date)`: A custom implementation of the ISO string conversion, where each component (day, month, year, hour, minute, second, and millisecond) is extracted from the Date object using separate variables.

**Pros and Cons:**

### 1. Built-in `toISOString()` method:

Pros:
    *   **Efficiency**: Built-in methods are optimized for performance.
    *   **Standardization**: The result is standardized across browsers and environments.

Cons:
    *   **Limited control**: The implementation may not provide the desired level of control over formatting.

### 2. Custom `concat()` method:

Pros:
    *   **Control**: Provides a high degree of control over the formatting process.
    *   **Flexibility**: Can handle edge cases or customize the output format as needed.

Cons:
    *   **Performance**: The custom implementation may not be optimized for performance, potentially leading to slower execution times.
    *   **Browser compatibility**: The result might vary across browsers and environments.

**Library Used:**

None. This benchmark only involves built-in JavaScript methods.

**Special JS Features or Syntax:**

This benchmark does not use any special JavaScript features or syntax beyond what is standard in modern JavaScript implementations.

**Other Alternatives:**

If the goal is to compare the performance of different string formatting techniques, additional alternatives could include:

*   Using a library like `moment.js` for date and time manipulation.
*   Implementing custom formatting using regular expressions.
*   Utilizing other built-in methods like `toLocaleString()` or `Intl.DateTimeFormat`.

However, these alternatives would require modifications to the benchmark definition and implementation.

**Benchmark Preparation Code:**

The provided script preparation code is:

```javascript
var date = new Date();

function toISOString(date) {
    return date.toISOString().substr(0, 10);
}

function concat(date) {
    var ms = date.getMilliseconds();
    var s = date.getSeconds();
    var M = date.getMinutes();
    var h = date.getHours();
    var d = date.getDate();
    var m = date.getMonth() + 1;
    var y = date.getFullYear();
    var second = s <= 9 ? '0' + s : '' + s;
    var minute = M <= 9 ? '0' + M : '' + M;
    var hour = h <= 9 ? '0' + h : '' + h;
    var day = d <= 9 ? '0' + d : '' + d;
    var month = m <= 9 ? '0' + m : '' + m;
    var year = '' + y;
    return day + '-' + month + '-' + year + 'T' + hour + ':' + minute + ':' + second + '.' + ms;
}
```

This code creates a Date object and defines the `toISOString()` and `concat()` functions according to their respective specifications.

Related benchmarks:

TestISOvsConcat (version: 0)

Comparing performance of: 1 vs 2

Created: 2 years ago by: Guest

Jump to the latest result

1

2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):