Benchmark: Math.floor Vs parseInt

Tests:

parseInt
console.log('myclientid_' + parseInt('' + Math.random() * 100, 10))
Math.floor
console.log('myclientid_' + Math.floor(Math.random() * 100))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
Math.floor

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser/OS: Chrome 139 on Windows

View result in a separate tab

Test name	Executions per second
parseInt	221411.5 Ops/sec
Math.floor	343702.3 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**What is being tested?**

The benchmark measures the performance difference between `Math.floor` and `parseInt` in JavaScript, specifically when used with a random integer value.

**Options compared:**

There are two options being compared:

1. `Math.floor`: This function returns the largest integer less than or equal to a given number.
2. `parseInt`: This function converts a string representation of an integer to its corresponding integer value.

**Pros and Cons:**

**`Math.floor`:**

Pros:

* Simple and straightforward implementation
* Fast and efficient, as it only requires a single arithmetic operation

Cons:

* May not work correctly with negative numbers or non-integer values
* Can be slower than `parseInt` for certain inputs due to the overhead of rounding down to the nearest integer

**`parseInt`:**

Pros:

* More versatile, as it can handle strings with leading zeros and non-integer values
* Faster than `Math.floor` for certain inputs, such as large integers or strings with multiple decimal places

Cons:

* More complex implementation due to the need to parse the string representation of an integer
* May introduce additional overhead or errors if not used correctly

**Library usage:**

There is no explicit library mentioned in the provided code. However, `parseInt` relies on the host environment's number parsing functionality, which may use libraries like ICU (International Components for Unicode) under the hood.

**Special JavaScript features:**

The benchmark doesn't explicitly use any special JavaScript features or syntax beyond standard ES6+ syntax. If you're interested in exploring more advanced features, you could consider adding options that utilize modern language constructs like async/await, Promises, or Web Workers.

**Other alternatives:**

If you'd like to explore alternative approaches or modifications to this benchmark, here are a few suggestions:

* Compare the performance of `Math.floor` and `parseInt` with different radix values (e.g., base 16 or base 36).
* Test the performance of `Math.floor` versus `parseFloat` for floating-point arithmetic.
* Explore the impact of using a different data type (e.g., BigInt) on the performance of these functions.

To modify the benchmark, you would need to update the `Benchmark Definition` JSON and adjust the test cases accordingly. The updated code would look something like this:
```json
"[
    {
        "Benchmark Definition": "console.log('myclientid_' + Math.floor(Math.random() * 100, 16))",
        "Test Name": "Math.floor radix 16"
    },
    // ...
]
```
Keep in mind that you'll need to update the test cases and benchmark preparation code to accommodate any changes you make to the benchmark.

Related benchmarks:

Math.floor Vs parseInt (version: 0)

Comparing performance of: parseInt vs Math.floor

Created: 4 years ago by: Guest

Jump to the latest result

parseInt

Math.floor

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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