Benchmark: string.Empty as ""

Tests:

string.Empty + "Ok"
var result = String.Emty + "Ok"
"" + "Ok"
var result = "" + "Ok"
string.Empty Length + 42
var result = String.Length + 42
"".Length + 42
var result = "".Length + 42

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string.Empty + "Ok"
"" + "Ok"
string.Empty Length + 42
"".Length + 42

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.35

Browser/OS: Chrome 107 on Windows

View result in a separate tab

Test name	Executions per second
string.Empty + "Ok"	9651955.0 Ops/sec
"" + "Ok"	1019023808.0 Ops/sec
string.Empty Length + 42	9633816.0 Ops/sec
"".Length + 42	967717632.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition is a JSON object that defines a simple JavaScript expression to be evaluated. In this case, there are four different expressions:

1. `var result = String.Empty + "Ok"`
2. `var result = "" + "Ok"`
3. `var result = String.Length + 42`
4. `var result = "" .Length + 42`

These expressions test the performance of concatenating strings using different approaches.

**String Concatenation**

The benchmark tests four ways to concatenate strings:

1. **Using the `+` operator**: This is a common way to concatenate strings in JavaScript. The `Empty` property of the `String` object is not actually an empty string, as it seems to be indicated by the name; instead, this test case checks how fast `"Ok"` is concatenated with either an empty string literal (`""`) or the result of accessing the `Length` property of a non-existent `String` object.
2. **Using the unary `+` operator**: This syntax is used to convert a value to a number. In this case, it's used to concatenate an empty string (`""`) with `"Ok"`.
3. **Accessing the `Length` property of an object**: This test case checks how fast the result of accessing the `Length` property of an object (in this case, a non-existent `String` object) is concatenated with the integer value `42`.

**Library and Syntax**

The benchmark uses the following library:

* No explicit library is mentioned, but it's likely that the `String` object is being used as-is, which means it's being used from the built-in JavaScript language.

No special JS features or syntax are explicitly used in this benchmark. However, it's worth noting that the use of the unary `+` operator for string concatenation is not a recommended practice in modern JavaScript development.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Using the `+` operator**:
	* Pros: Simple and widely supported.
	* Cons: Can lead to unexpected results if used with non-string values.
2. **Using the unary `+` operator**:
	* Pros: Fast, as it's optimized for number concatenation.
	* Cons: Less readable and can be confusing for other developers.
3. **Accessing the `Length` property of an object**:
	* Pros: Not commonly used, so might be a good option for avoiding potential issues.
	* Cons: May not be supported in older browsers or environments.

**Other Alternatives**

If you're looking for alternative ways to concatenate strings in JavaScript, consider using template literals (introduced in ES6):

```javascript
var result = `${""}`; // OR
var result = `${42}`;
```

These provide a more readable and efficient way to concatenate strings.

Related benchmarks:

string.Empty as "" (version: 0)

string.Empty as "" speed test

Comparing performance of: string.Empty + "Ok" vs "" + "Ok" vs string.Empty Length + 42 vs "".Length + 42

Created: 3 years ago by: Guest

Jump to the latest result

string.Empty + "Ok"

"" + "Ok"

string.Empty Length + 42

"".Length + 42

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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