Benchmark: Concat vs plus sign string

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const image = 'https://www.dell.com/images/global/navigation/navbar/delllogo.svg';
const prodname = 'Latitude';
const viewItemUrl = 'https://www.dell.com/en-us/shop/computing/latitude';
const rewardsTotalValue = '$1357.85';
const display = '$1557.85';
const a = 'goToCartElClass';
const r = 'rewardsTotalValue';
const isConfigurable = 'isConfigurable';
const description = 'lorem ipsum dolor sit amet consectetur adipiscing elit';

Tests:

Concat
const html = '\n <div class="tnt-dell-rewards-carousel-body-item">\n <div class="tnt-dell-rewards-carousel-body-item-image">\n <img src="'.concat(image,'" alt="').concat(prodname,'">\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-info">\n <p class="tnt-dell-rewards-item-name"><a href="').concat(viewItemUrl,'" title="').concat(prodname,'">').concat(prodname,'</a></p>\n <p class="tnt-dell-rewards-item-value">after applying <b>').concat(rewardsTotalValue,'</b> Rewards when paying in checkout</p>\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-price">\n <s>').concat(display,"</s>\n <b>").concat(a,'</b>\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-buttons">\n <a href="//www.dell.com/purchase/cart/en-ca" class="').concat(r,'" title="Go to Cart">Go to Cart</a>\n <a href="').concat(viewItemUrl,'" class="tnt-dell-rewards-button-secondary tnt-dell-rewards-button-configurable-').concat(isConfigurable,'" title="Customize">Customize the ').concat(description&&description.slice(0,-1),"</a>\n </div>\n </div>\n "); document.body.insertAdjacentHTML('afterbegin', html);
+ sign
const html = '\n <div class="tnt-dell-rewards-carousel-body-item">\n <div class="tnt-dell-rewards-carousel-body-item-image">\n <img src="'+ image +'" alt="' + prodname +'">\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-info">\n <p class="tnt-dell-rewards-item-name"><a href="'+viewItemUrl+'" title="'+prodname+'">'+prodname+'</a></p>\n <p class="tnt-dell-rewards-item-value">after applying <b>'+rewardsTotalValue+'</b> Rewards when paying in checkout</p>\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-price">\n <s>'+display+"</s>\n <b>"+a+'</b>\n </div>\n <div class="tnt-dell-rewards-carousel-body-item-buttons">\n <a href="//www.dell.com/purchase/cart/en-ca" class="'+r+'" title="Go to Cart">Go to Cart</a>\n <a href="'+viewItemUrl+'" class="tnt-dell-rewards-button-secondary tnt-dell-rewards-button-configurable-'+isConfigurable+'" title="Customize">Customize the '+description&&description.slice(0,-1)+'</a>\n </div>\n </div>\n '; document.body.insertAdjacentHTML('afterbegin', html);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Concat
+ sign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Windows

View result in a separate tab

Test name	Executions per second
Concat	38238.1 Ops/sec
+ sign	284984.7 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 7 months ago):

LLMs can make mistakes. Check important info.

The benchmark defined in the provided JSON tests the performance of two different methods for constructing and manipulating strings in JavaScript: using the `concat()` method and the `+` (plus sign) operator.

### Options Compared

1. **String Concatenation using `concat()` Method**:
    - **Test Case**: 
      ```javascript
      const html = '\\n            <div class="tnt-dell-rewards-carousel-body-item">\\n                ... img src="'.concat(image,'\" alt=\"').concat(prodname,'\">\\n                ...</div>\\n        ");
      ```

2. **String Concatenation using `+` (Plus Sign) Operator**:
    - **Test Case**: 
      ```javascript
      const html = '\\n            <div class="tnt-dell-rewards-carousel-body-item">\\n                ... img src="'+ image +'" alt="'+ prodname +'">\\n                ...</div>\\n        ';
      ```

### Performance Results

According to the latest benchmark results:
- The `+` operator achieved **284984.69 executions per second**.
- The `concat()` method achieved **38238.09 executions per second**.

### Pros and Cons

**Using `concat()` method:**
- **Pros**:
  - More explicit and can be easier to read in some contexts, especially for multi-part concatenations.
  - Can be chained to concatenate multiple strings in a single expression.
  
- **Cons**:
  - Generally slower than the `+` operator in modern JavaScript engines, as indicated by the benchmark results.
  - Slightly less common, which might lead to less familiarity among developers.

**Using `+` (Plus Sign) Operator:**
- **Pros**:
  - Typically faster and preferred in performance-sensitive situations, as shown by the benchmark results.
  - More idiomatic for concatenating strings in JavaScript; most developers are familiar with its usage.
  
- **Cons**:
  - More prone to errors in complex statements when not carefully managed.
  - Might become less readable when concatenating many strings with different variables, especially if newlines or escape characters are required.

### Other Considerations

In JavaScript, string concatenation has evolved, and modern JavaScript engines are highly optimized for the `+` operator. While using `concat()` may still have its use cases, the `+` operator is often favored for its performance and readability. JavaScript also supports template literals (using backticks `` ` ``) which allow for a cleaner, more readable way to do multi-line strings and string interpolation, avoiding concatenation altogether:
```javascript
const html = `
            <div class="tnt-dell-rewards-carousel-body-item">
                <div class="tnt-dell-rewards-carousel-body-item-image">
                    <img src="${image}" alt="${prodname}">
                </div>
                ...
            </div>
        `;
```
Template literals introduce features such as:
- Multi-line strings.
- Variable interpolation without explicit concatenation.
- Cleaner syntax, improving maintainability.

Overall, the choice between these methods depends on the specific requirements of your application, the readability of the code, and the performance needs of your string manipulations. For common use cases, it’s usually best to use the `+` operator or, when appropriate, template literals to keep the code clean and efficient.

Related benchmarks:

Concat vs plus sign string (version: 1)

Comparing performance of: Concat vs + sign

Created: 7 months ago by: Guest

Jump to the latest result

Concat

+ sign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 7 months ago):