Benchmark: Template vs string concat

Script Preparation code:

var obj = {param1:"test",param2:"test",param3:"test",param4:"test"}

Tests:

Concatenation
for (let i = 0; i < 10000; i++){ let s = ""; for (let j = 0; j < 4; j++){ s += obj[j] + " - "; } s = s.substring(0,s.length - 3); }
Template strings
for (let i = 0; i < 10000; i++){ let s = `${obj[0]} - ${obj[1]} - ${obj[2]} - ${obj[3]}`; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Concatenation
Template strings

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.

**What is being tested?**

MeasureThat.net is testing the performance difference between two approaches: concatenating strings using the traditional method (`+`) and template literals (template strings). The benchmark script generates two arrays of strings, `obj`, and then iterates through a loop 10,000 times. In the traditional method, each string is concatenated by adding the array elements with `-` in between, while in the template literal approach, all elements are included in the string using template literals.

**Options being compared**

The two approaches being tested are:

1. **Traditional String Concatenation (`+`)**
	* Pros: Simple, widely supported, and well-known.
	* Cons: Can lead to performance issues due to the overhead of creating temporary strings and concatenating them.
2. **Template Literals (template strings)**
	* Pros: More efficient and readable than traditional string concatenation. Template literals reduce the number of temporary strings created during execution.
	* Cons: Less widely supported in older browsers, but gaining popularity.

**Other considerations**

When using template literals, it's essential to note that the expression inside the backticks must be a valid JavaScript expression, which means you cannot directly concatenate non-numeric values or non-string expressions with `-`. Additionally, some older browsers may not support template literals, so it's crucial to test for browser compatibility.

**Library used**

The benchmark script uses the `obj` array as a parameter. It appears to be an example of a real-world data structure, where each element is a string that represents a value.

**Special JS feature or syntax**

There are no special JavaScript features or syntaxes mentioned in this benchmark. The code only uses standard JavaScript syntax and features.

Now, let's discuss the benchmark results:

The latest benchmark result shows that template literals outperform traditional string concatenation in terms of executions per second.

To gain a better understanding of the performance differences, you can try modifying the `obj` array to contain non-string elements or using different data structures. Additionally, consider exploring other optimization techniques, such as reducing the number of iterations or minimizing the scope of variables used in the loop.

**Other alternatives**

If you're interested in exploring alternative approaches, here are a few options:

1. **Using a string buffer**: Implementing a custom string buffer to accumulate and manipulate strings could potentially outperform traditional concatenation.
2. **Regex-based approach**: Using regular expressions to concatenate strings could be an interesting alternative, but it may require more complex implementation and optimization.
3. **Custom-built loop**: Optimizing the loop using assembly code or a low-level language like C++ might lead to performance improvements, but this would likely require significant expertise and resources.

Keep in mind that benchmarking is an essential step in optimizing performance-critical code. MeasureThat.net provides a valuable platform for comparing different approaches and identifying areas for improvement.

Related benchmarks:

Template vs string concat (version: 0)

Comparing performance of: Concatenation vs Template strings

Created: 3 years ago by: Guest

Jump to the latest result

Concatenation

Template strings

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):