Benchmark: toFixed vs Math.round() sd6f54sd6f54s6df54ds6f

Script Preparation code:

var someFloat = 0.123456789;

Tests:

toFixed(4) someFloat.toFixed(4); someFloat.t
+someFloat.toFixed(4);
(Math.round(*10000)/10000).toString()
(Math.round(someFloat*10000)/10000);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toFixed(4) someFloat.toFixed(4); someFloat.t
(Math.round(*10000)/10000).toString()

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
toFixed(4) someFloat.toFixed(4); someFloat.t	3563536.2 Ops/sec
(Math.round(*10000)/10000).toString()	6178558.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark defines two different approaches to convert a floating-point number `someFloat` to an integer:

1. `toFixed(4)`: This method rounds the number to 4 decimal places using the IEEE 754 floating-point representation.
2. `(Math.round(*10000)/10000).toString()`: This approach first multiplies the float by 10,000, rounds it using `Math.round()`, and then divides it back by 10,000. Finally, it converts the result to a string.

The benchmark also mentions two other approaches:

1. `(someFloat.t)`: Not explicitly defined in the benchmark definition, but likely intended as another way to truncate a float (as mentioned later).
2. `Math.floor fast`: This is not present in the original benchmark definition provided, but it's worth noting that `Math.floor()` would round down to the nearest integer.

**Approaches Compared**

The benchmark compares the performance of two approaches:

1. `toFixed(4)` vs `(Math.round(*10000)/10000).toString()`
2. `toFixed(4) someFloat.toFixed(4); someFloat.t`

**Pros and Cons of Approaches**

* `toFixed(4)`:
	+ Pros: Simple, widely supported, and efficient.
	+ Cons: May not be suitable for all use cases (e.g., when exact integer values are required).
* `(Math.round(*10000)/10000).toString()`:
	+ Pros: Can handle larger integers than `toFixed(4)`, but may be slower due to the multiplication and division operations.
	+ Cons: More complex, less widely supported, and potentially slower.

**Library Used**

The benchmark uses the following library:

* No explicit library is mentioned in the benchmark definition or test cases. However, it's likely that a browser (e.g., Chrome) provides the necessary functions for floating-point arithmetic.

**Special JS Feature/Syntax**

None of the approaches require any special JavaScript features or syntax beyond what's standard in modern browsers.

**Other Alternatives**

If `someFloat.t` is intended to be another way to truncate a float, it could be implemented using bitwise operations (e.g., `(someFloat >>> 0)`, where `>>>` is the unsigned right shift operator). However, this approach may not be suitable for all use cases.

Additionally, other approaches to convert floating-point numbers to integers might involve using specialized libraries or algorithms, such as the `Float32Array` and `Float64Array` types in JavaScript (which provide more efficient implementations of floating-point arithmetic).

In terms of alternative benchmarks, other test cases could be added to compare different methods for:

* Rounding down to the nearest integer: `(someFloat >>> 0)`
* Rounded up to the nearest integer: `(Math.ceil(someFloat))`
* Truncating a float to a specific number of decimal places (e.g., `toFixed(2)` or `toFixed(8)`)
* Converting floating-point numbers to integers using different algorithms or libraries

Related benchmarks:

toFixed vs Math.round() sd6f54sd6f54s6df54ds6f (version: 0)

Comparing performance of: toFixed(4) vs toPrecision(4).toString() vs (Math.round(*10000)/10000).toString() vs Math.floor fast vs the new Math.trunc

Comparing performance of: toFixed(4) someFloat.toFixed(4); someFloat.t vs (Math.round(*10000)/10000).toString()

Created: one year ago by: Guest

Jump to the latest result

toFixed(4) someFloat.toFixed(4); someFloat.t

(Math.round(*10000)/10000).toString()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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