Benchmark: Number + String vs String + String

Tests:

Number + String
const rotate = 0 + 'deg'; const translate = 0 + 'px';
String + String
const rotate = '0' + 'deg'; const translate = '0' + 'px';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Number + String
String + String

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 break down the provided JSON data to understand what is being tested in this JavaScript microbenchmark.

**Benchmark Definition**
The benchmark definition is not explicitly stated, but based on the provided script preparation code and test cases, it appears that we are comparing the performance of two approaches:

1. Converting a number to a string using the `+` operator with a string literal (e.g., `0 + 'deg'`).
2. Converting a string to a string using the `+` operator with another string literal (e.g., `'0' + 'deg'`) or simply concatenating two strings (e.g., `"0" + 'deg'`).

**Comparison Options**
There are two primary options being compared:

* **Option 1: Number to String Conversion** (`const rotate = 0 + 'deg';`)
	+ Pros:
		- Often optimized by JavaScript engines due to its simplicity.
		- May be more readable and maintainable for developers familiar with this pattern.
	+ Cons:
		- Might lead to unnecessary string creation, potentially affecting performance.
* **Option 2: String to String Conversion** (`const rotate = '0' + 'deg';`)
	+ Pros:
		- Can lead to fewer intermediate objects being created, reducing memory allocation and garbage collection overhead.
	+ Cons:
		- May be less readable or maintainable for developers familiar with this pattern.

**Library and Special JS Features**
There is no explicit mention of any libraries being used in the benchmark definition. However, it's essential to note that the use of template literals (e.g., `const rotate = 0 + 'deg';`) can lead to improved performance due to their optimized parsing mechanism.

**Test Case Analysis**

For each test case:

* **Number + String**: The script preparation code uses the `+` operator with a number and a string literal (`0 + 'deg'`). This is likely an optimization for converting numbers to strings.
* **String + String**: The script preparation code uses the `+` operator with two string literals or concatenation operators (`'0' + 'deg'`). This is another approach to converting strings.

**Other Alternatives**
Some alternative approaches that might be worth considering, but are not explicitly tested in this benchmark:

* Using the `toString()` method or the `String()` constructor to convert numbers or strings.
* Employing a different string concatenation strategy (e.g., using `'' +` instead of `+ '')`.
* Comparing the performance of using `const` vs. `var` or `let` for variable declarations.

**Considerations**
When running this benchmark, consider the following:

* Ensure that all JavaScript engines and versions are accounted for in the benchmark definition.
* Verify that the script preparation code is correctly optimized for each approach being tested.
* Consider adding additional test cases to cover edge scenarios or other performance-critical aspects of string concatenation.

Related benchmarks:

Number + String vs String + String (version: 0)

Comparing performance of: Number + String vs String + String

Created: 3 years ago by: Guest

Jump to the latest result

Number + String

String + String

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):