Benchmark: recursive string literal vs addition assignment

Script Preparation code:

var values = [];
for (let i = 0; i < 1000; ++i) {
  values.push(i);
}

Tests:

recursive string literal
var f = i => `x = ${values[i]} or ${i < values.length ? f(i+1) : '0=1'}`; var result1 = f(0); console.log(result1);
addition assignment
var s = '0=1'; for (var i = 0; i < values.length; ++i) { s += `x = ${values[i]}`; } var result2 = s; console.log(result2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
recursive string literal
addition assignment

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 provided benchmark.

**Benchmark Purpose**

The benchmark measures the performance difference between two approaches for constructing strings in JavaScript:

1. **Recursive String Literal**: Using template literals with an arrow function to build a string by appending values from the `values` array.
2. **Addition Assignment**: Concatenating strings using the `+=` operator, where each iteration adds the next value from the `values` array.

**Comparison of Options**

Both approaches have their pros and cons:

**Recursive String Literal**

Pros:

* More concise and expressive code
* Easier to read and maintain

Cons:

* Potential performance overhead due to function call and string interpolation
* May lead to stack overflow errors for large input values

**Addition Assignment**

Pros:

* Familiar syntax for many developers
* Can be optimized using techniques like caching or reuse of intermediate results

Cons:

* Less concise code compared to template literals
* More prone to error due to concatenation and potential string buffer overflows

**Library Considerations (None in this case)**

There are no libraries used in the benchmark.

**Special JavaScript Feature/ Syntax**

The benchmark uses a feature introduced in ECMAScript 2015 (ES6): **Template Literals** (`\` followed by an expression). It also utilizes arrow functions (`=>`) to define small, single-expression functions. These features allow for more concise and readable code.

**Alternative Approaches**

Other approaches could be considered:

1. **String concatenation using `+`**: `result = '0=1'; for (var i = 0; i < values.length; ++i) { result += 'x = ' + values[i]; }`
2. **Using a loop to build the string incrementally**: `result = ''; for (var i = 0; i < values.length; ++i) { result += 'x = ' + values[i] + ';'; }`
3. **Using a different string building library or tool**

**Benchmark Results Interpretation**

The provided benchmark results show the execution per second (ExecutionsPerSecond) for each browser and platform, allowing users to compare performance differences between the two approaches.

Related benchmarks:

recursive string literal vs addition assignment (version: 0)

Comparing performance of: recursive string literal vs addition assignment

Created: 3 years ago by: Guest

Jump to the latest result

recursive string literal

addition assignment

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):