Benchmark: Tilda vs Plus - MeasureThat.net

Tests:

Tilda
const str = '15' const num = ~~str
Plus
const str = '15' const num = +str

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Tilda
Plus

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/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Windows

View result in a separate tab

Test name	Executions per second
Tilda	80066848.0 Ops/sec
Plus	104746912.0 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 benchmark and its components.

**Benchmark Definition**
The benchmark definition is represented by two test cases:

1. **Tilda**: `const str = '15'\r\nconst num = ~~str`
2. **Plus**: `const str = '15'\r\nconst num = +str`

These test cases aim to compare the performance of two different methods to convert a string to an integer in JavaScript.

**Options Compared**
The options being compared are:

* The bitwise NOT operator (`~~`) vs
* The unary plus operator (`+`)

In the Tilda method, the `~~` operator is used to perform a bitwise NOT operation on the string. This operator will truncate the leading zeros from the number and return an integer value.

In the Plus method, the `+` operator is used to perform a loose conversion of the string to an integer. This method will try to convert the entire string to an integer, which may result in unexpected behavior if the string contains non-numeric characters or has a leading zero.

**Pros and Cons**

* **Tilda (~~)**:
	+ Pros: Faster execution time due to bitwise NOT operation
	+ Cons: May not work as expected for strings with leading zeros or non-numeric characters
* **Plus (+)**:
	+ Pros: Works with strings containing non-numeric characters, preserves leading zeros
	+ Cons: Slower execution time due to loose conversion

**Other Considerations**

* The test cases assume that the input string is a numeric string, specifically `'15'`. If the input string can be anything, the Plus method may not work as expected.
* Both methods are vulnerable to potential security issues if the input string comes from an untrusted source.

**Library and Special JS Feature**
Neither of these methods relies on any specific JavaScript library. However, they do utilize a special JavaScript feature: template literals (`\r\n` in this case). Template literals allow you to embed expressions inside string literals, making it easier to write readable code.

**Benchmark Preparation Code and Test Cases**
The provided benchmark preparation code is empty, which means that the test cases are run directly without any additional setup or preparation.

Now, let's look at the latest benchmark result:

```
[
  {
    "RawUAString": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36",
    "Browser": "Chrome 73",
    "DevicePlatform": "Desktop",
    "OperatingSystem": "Windows",
    "ExecutionsPerSecond": 813438912.0,
    "TestName": "Tilda"
  },
  {
    "RawUAString": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36",
    "Browser": "Chrome 73",
    "DevicePlatform": "Desktop",
    "OperatingSystem": "Windows",
    "ExecutionsPerSecond": 808174016.0,
    "TestName": "Plus"
  }
]
```

The benchmark results show that the Tilda method outperforms the Plus method in terms of execution speed.

**Alternatives**
Other alternatives for converting a string to an integer include:

* Using `parseInt()` function: `const num = parseInt(str)`
* Using `Number()` function: `const num = Number(str)`
* Using regular expressions: `const num = Math.floor(str.replace(/^0+/, ''))`

These alternatives may have different performance characteristics and trade-offs in terms of security and readability.

Related benchmarks:

Tilda vs Plus (version: 1)

Comparing performance of: Tilda vs Plus

Created: 7 years ago by: Registered User

Jump to the latest result

Tilda

Plus

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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