Benchmark: cast to bigint - MeasureThat.net

Tests:

int
42
bigint
42n
cast int to bigint
BigInt(42)
cast bigint to bigint
BigInt(42n)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
int
bigint
cast int to bigint
cast bigint to bigint

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definition and test cases.

**Benchmark Definition:**

The `Script Preparation Code` field is empty, which means no custom code is prepared by the user for this benchmark. The `Html Preparation Code` field is also empty, indicating that no HTML-related setup is required.

However, when analyzing the `TestName` fields in the individual test cases, it's clear that the purpose of this benchmark is to compare the performance of three different approaches:

1. **Int**: This represents converting a regular integer (32-bit) to a JavaScript primitive number type.
2. **BigInt**: This represents converting an unsigned 64-bit integer (`42n`) to a JavaScript BigInt object.
3. **Cast int to bigint**: This represents casting a regular integer to a BigInt object, which involves performing additional operations.

**Options Compared:**

The benchmark is comparing the performance of these three approaches:

* Converting a regular integer (32-bit) to an unsigned 64-bit integer (`42` vs `42n`)
* Converting an unsigned 64-bit integer to another unsigned 64-bit integer (`42n` vs `BigInt(42)` vs `BigInt(42n)`)
* Casting a regular integer to a BigInt object (`42` vs `BigInt(42)`)

**Pros and Cons:**

Here's a brief analysis of each approach:

1. **Int**: This is the most straightforward conversion, but it may be slower due to the overhead of type coercion.
2. **BigInt**: Converting an unsigned 64-bit integer to a BigInt object might be faster because it directly uses the existing BigInt implementation, which can be optimized for performance.
3. **Cast int to bigint**: Casting a regular integer to a BigInt object involves additional operations, such as type checking and boxing/unboxing, which might slow down the conversion.

**Libraries and Features:**

In this benchmark, the following libraries or features are used:

* `BigInt`: This is a built-in JavaScript feature for working with unsigned 64-bit integers. It was introduced in ECMAScript 2017.
* Firefox's implementation of `BigInt` is likely being tested here.

No other special JS features or syntax are used in this benchmark.

**Alternatives:**

If you wanted to write an alternative benchmark, you might consider comparing performance with:

* Using a different language (e.g., C++, Rust) for the conversion
* Implementing a custom BigInt-like data type using native code
* Using a different browser or JavaScript engine to run the benchmark

Keep in mind that these alternatives would likely require significant changes to the benchmark definition and test cases.

Related benchmarks:

cast to bigint (version: 0)

Comparing performance of: int vs bigint vs cast int to bigint vs cast bigint to bigint

Created: 2 years ago by: Guest

Jump to the latest result

int

bigint

cast int to bigint

cast bigint to bigint

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):