Benchmark: Number vs + vs parseFloat 234

Tests:

Number
var number = Number("some text 23433");
parseFloat
var parse = parseFloat("some text 23433");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Number
parseFloat

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 dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is being tested?**

The provided benchmark tests two different ways to parse a string containing a number: using the built-in `Number` function and using the `parseFloat` function. The input string contains non-numeric characters, which should trigger the parsing behavior to convert only the numeric part of the string to a number.

**Options compared:**

Two options are being compared:

1. **Using the `Number` function**: This approach attempts to parse the entire string as an integer, including any non-numeric characters.
2. **Using `parseFloat`**: This approach parses only the numeric part of the string and returns a floating-point number.

**Pros and Cons:**

* **Using `Number`**:
	+ Pros: Simple and straightforward.
	+ Cons: May fail if the input string contains non-numeric characters, leading to incorrect results.
* **Using `parseFloat`**:
	+ Pros: More robust and accurate, as it only parses the numeric part of the string.
	+ Cons: May be slower due to the additional parsing step.

**Library usage**

There is no library explicitly mentioned in the benchmark definition or test cases. However, the `Number` function uses a V8 JavaScript Engine (specifically Chrome's V8) under the hood.

**Special JS feature/syntax**

No special JavaScript features or syntax are used in these benchmark definitions. The tests only focus on comparing the performance of two standard built-in functions: `Number` and `parseFloat`.

**Other alternatives**

If you want to compare other approaches, here are some additional options:

1. **Using `parseInt`**: Similar to `Number`, but allows specifying a radix (base) for parsing.
2. **Regular expressions**: Using regular expressions to extract the numeric part of the string and then parsing it as a number.
3. **Manual parsing**: Implementing a custom parser to extract the numeric part of the string and convert it to a number.

Keep in mind that these alternative approaches might introduce additional complexity, overhead, or performance differences compared to using `Number` and `parseFloat`.

Now that we've explored the benchmark details, let's take a closer look at how MeasureThat.net executes these tests.

Related benchmarks:

Number vs + vs parseFloat 234 (version: 0)

Comparing performance of: Number vs parseFloat

Created: 3 years ago by: Guest

Jump to the latest result

Number

parseFloat

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):