Benchmark: String to Date VS Date to String

Script Preparation code:

var defaultDateOptions = {
    compact: false,
    dated: true,
    timed: false,
    sep: ':',
    utc: false
}
dateToISOString = function (date, options) {
    if (options === void 0) { options = defaultDateOptions; }
    var response = '';
    options = { ...defaultDateOptions, ...options };
    if (options.dated) {
        var year = options.utc ? date.getUTCFullYear() : date.getFullYear();
        var month = (options.utc ? date.getUTCMonth() : date.getMonth()) + 1;
        var day = options.utc ? date.getUTCDate() : date.getDate();
        var monthStr = month < 10 ? "0" + month : "" + month;
        var dayStr = day < 10 ? "0" + day : "" + day;
        response += [year, monthStr, dayStr].join(options.compact ? '' : '-');
    }
    if (options.timed) {
        var hours = options.utc ? date.getUTCHours() : date.getHours();
        var minutes = options.utc ? date.getUTCMinutes() : date.getMinutes();
        var seconds = options.utc ? date.getUTCSeconds() : date.getSeconds();
        var hoursStr = hours < 10 ? "0" + hours : "" + hours;
        var minutesStr = minutes < 10 ? "0" + minutes : "" + minutes;
        var secondsStr = seconds < 10 ? "0" + seconds : "" + seconds;
        if (options.dated)
            response += ' ';
        response += [hoursStr, minutesStr, secondsStr].join(options.compact ? '' : options.sep);
    }
    return response;
}

Tests:

String to Date
const str = '2022-01-01' const dt = new Date(str)
Date to String
const dt = new Date() dateToISOString(dt)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String to Date
Date to String

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**What is being tested?**

The provided JSON benchmark definition and test cases measure the performance of two approaches:

1. **String to Date**: Converting a string in the format "YYYY-MM-DD" to a JavaScript `Date` object using the `new Date()` constructor or a custom function.
2. **Date to String**: Converting a JavaScript `Date` object to a string in the format "YYYY-MM-DD" using the `toISOString()` method.

**Options compared**

Two options are being compared:

1. Using the built-in `new Date()` constructor.
2. Using a custom function with optional parameters (`dateToISOString`) that can be configured to include or exclude date and time components.

**Pros and cons of each approach:**

* **Built-in `new Date()` constructor**:
	+ Pros:
		- Simple and straightforward implementation.
		- No additional dependencies required.
	+ Cons:
		- May not perform well for all input formats (e.g., strings with non-standard date formats).
		- Does not provide control over the output format.
* **Custom `dateToISOString` function**:
	+ Pros:
		- Provides more flexibility and control over the output format.
		- Can handle a wider range of input formats.
	+ Cons:
		- Requires additional code and dependencies.
		- May be slower due to the overhead of parsing and formatting.

**Library and its purpose**

The `dateToISOString` function uses an object with optional parameters (`defaultDateOptions`) to configure the output format. The library being used is a simple and lightweight implementation that allows for easy customization of the date and time components.

**Special JS feature or syntax**

No special JavaScript features or syntax are being tested in this benchmark. The focus is on the performance comparison between two approaches using standard JavaScript constructs.

**Other alternatives**

To improve the benchmark, additional test cases could be added to cover other scenarios, such as:

* Using different date formats (e.g., "MM/DD/YYYY", "YYYY-MM-DDTHH:MM:SSZ")
* Handling edge cases (e.g., invalid input, NaN values)
* Comparing performance with different JavaScript engines or implementations
* Evaluating the impact of caching or memoization on the benchmark results

By expanding the scope of the benchmark, a more comprehensive understanding of the performance characteristics of each approach can be gained.

Related benchmarks:

String to Date VS Date to String (version: 0)

Comparing performance of: String to Date vs Date to String

Created: 3 years ago by: Guest

Jump to the latest result

String to Date

Date to String

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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