Benchmark: parseInt vs string compare

Script Preparation code:

var num = "10";

Tests:

parseInt
parseInt(num) !== 0
string compare
num !== "0"

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parseInt
string compare

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/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Windows

View result in a separate tab

Test name	Executions per second
parseInt	7295168.0 Ops/sec
string compare	18203350.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `parseInt(num) !== 0`
2. `num !== "0"`

These test cases compare the result of calling `parseInt` on a string literal with the value `"10"` versus comparing the same string directly to the value `"0"`. The goal is to determine which approach is faster.

**Options Compared**

There are two options being compared:

1. **Using `parseInt`**: This option calls the built-in JavaScript function `parseInt` and passes the string `"10"` as an argument.
2. **Direct Comparison**: This option directly compares the string `"10"` with the value `"0"` using the `!==` operator.

**Pros and Cons**

- **Using `parseInt`:**
	* Pros:
		+ Can handle more complex parsing scenarios (e.g., strings starting with a prefix)
	* Cons:
		+ May incur additional overhead due to function call and potentially unnecessary checks
- **Direct Comparison:**
	+ Pros:
		- Lightweight and straightforward comparison
		- No function call overhead
	+ Cons:
		- Limited to simple string comparisons only (e.g., no prefix handling)

**Library Used**

None explicitly mentioned, but it's worth noting that JavaScript engines like V8 in Chrome have optimized the `parseInt` function for performance.

**Special JS Feature or Syntax**

This benchmark does not use any special JavaScript features or syntax. It only relies on standard language constructs and built-in functions.

**Alternatives**

Other alternatives to measure parsing performance might include:

* Using a different string representation (e.g., `Number()` vs `parseInt()`)
* Comparing different data types (e.g., numbers, strings, booleans)
* Exploring different parsing techniques (e.g., regular expressions, Unicode-aware parsing)

**Benchmark Preparation Code**

The provided script preparation code is simple:
```javascript
var num = "10";
```
This sets up a constant string variable `num` with the value `"10"`.

I hope this explanation helps clarify what's being tested in this benchmark!

Related benchmarks:

parseInt vs string compare (version: 0)

Comparing performance of: parseInt vs string compare

Created: one year ago by: Registered User

Jump to the latest result

parseInt

string compare

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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