Benchmark: lambdas-noinline

Script Preparation code:

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

Tests:

lambda
let y = []; function justReturn(item) { return item } for(i=0; i<1000; i++){ y[i] = justReturn(x[i]) }
no lambda
let z = []; for(i=0; i<1000; i++){ z[i] = x[i] }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lambda
no lambda

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of two different approaches to processing an array in JavaScript: using arrow functions (lambdas) and traditional function declarations.

**Options Compared:**

1. **`lambda`:** This test case uses an arrow function `justReturn(item) { return item }` within a `for` loop to process each element of the input array (`x`). Arrow functions are a concise way to define functions in JavaScript introduced in ES6. 
2. **`no lambda`:**  This test case uses a traditional function declaration `function justReturn(item) { return item }` inside the `for` loop, achieving the same outcome as the lambda approach.

**Pros and Cons:**

* **Lambda Functions (arrow functions):** 
    * **Pros:** More concise syntax, lexical scoping (can access variables from the surrounding scope), often slightly faster in execution due to optimizations by modern JavaScript engines.
    * **Cons:** Can sometimes be harder to read for beginners, may not always be the most readable solution in complex scenarios.

* **Traditional Function Declarations:**
    * **Pros:** More familiar syntax for developers who learned JavaScript before ES6, can be more verbose but potentially clearer for complex logic.
    * **Cons:** Less concise than arrow functions, function arguments are passed using `this` (which can lead to confusion), less efficient execution in some cases due to the way they are compiled.

**Other Considerations:**

The benchmark result shows that the difference in performance between the two approaches is relatively small in this specific scenario. In general, for simple operations like this, the performance difference between lambdas and traditional function declarations is often negligible.

**Alternatives:**

* **Map() method:**  JavaScript offers a more declarative way to process arrays using methods like `map()`. This could be a more efficient and readable alternative for this type of operation.
    ```javascript
    const result = x.map(item => item); // Using map with lambda 
    ```

Let me know if you have any further questions or would like me to elaborate on any specific aspect!

Related benchmarks:

lambdas-noinline (version: 0)

Comparing performance of: lambda vs no lambda

Created: 5 years ago by: Guest

Jump to the latest result

lambda

no lambda

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):