Benchmark: Removing Decimal Math.Trunc vs toFixed

Script Preparation code:

var decimal = 5.1234;

Tests:

Trunc
x = Math.trunc(decimal);
toFixed
x = decimal.toFixed();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Trunc
toFixed

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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Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is defined in two parts:

1. **Script Preparation Code**: This is a JavaScript code snippet that sets up the test environment. In this case, it simply declares a variable `decimal` with a decimal value of 5.1234.
2. **Html Preparation Code**: Since there's no HTML preparation code provided, we can assume that the benchmark only involves JavaScript execution.

**Individual Test Cases**

The benchmark consists of two individual test cases:

1. **Trunc**
	* The benchmark definition uses `Math.trunc(decimal);` to calculate the truncated value.
2. **toFixed**
	* The benchmark definition uses `decimal.toFixed();` to format the decimal value as a string.

**Libraries and Features**

In this benchmark, we can see that the `Math` library is being used, which is part of the JavaScript standard library.

There are no special JS features or syntax mentioned in the benchmark. However, it's worth noting that the use of `toFixed()` might be affected by the browser's precision settings or the locale's decimal separator.

**Comparison Options**

The benchmark compares two approaches:

1. **Trunc**: Uses `Math.trunc(decimal);` to truncate the decimal value.
2. **toFixed**: Uses `decimal.toFixed();` to format the decimal value as a string.

**Pros and Cons of Each Approach**

**Trunc**

Pros:

* Faster execution, since it doesn't involve formatting or parsing.
* More accurate for integer arithmetic operations.

Cons:

* May not produce the desired decimal representation (e.g., trailing zeros).
* Can be less readable than `toFixed` for certain use cases.

**toFixed**

Pros:

* Produces a string representation of the decimal value with optional formatting options (e.g., precision, locale).
* More readable and maintainable than `Trunc` for many use cases.

Cons:

* Slower execution, since it involves formatting and parsing.
* May produce different results due to browser-specific settings or locale differences.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

* **Readability**: If you need a human-readable decimal representation, `toFixed` might be a better choice. Otherwise, `Trunc` is faster and more concise.
* **Accuracy**: If you require precise integer arithmetic results, `Trunc` is likely a better option. For most cases, the difference in accuracy between these two approaches will be negligible.

**Alternatives**

Other alternatives for removing decimal parts include:

1. **Math.round() + Math.floor()**: This approach rounds the value to the nearest integer and then takes the floor of the result.
2. **String manipulation**: You can use string methods like `toString()` or `substring()` to extract the integer part of the decimal value.

Keep in mind that these alternatives might have different performance characteristics, readability trade-offs, or potential edge cases compared to using `Math.trunc()` or `toFixed()`.

Related benchmarks:

Removing Decimal Math.Trunc vs toFixed (version: 0)

Comparing performance of: Trunc vs toFixed

Created: 3 years ago by: Guest

Jump to the latest result

Trunc

toFixed

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):