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For + Push VS For-Of + Push VS Map, Destructuring VS Indices
(version: 0)
Comparing performance of:
For + Push, Destructuring vs For + Push, Indices vs For-Of + Push, Destructuring vs For-Of + Push, Indices vs Map, destructured vs Map, indices
Created:
4 years ago
by:
Guest
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Script Preparation code:
var pairs = Array.from(new Array(10000)).map(() => ["as", "df"]); var result;
Tests:
For + Push, Destructuring
result = []; for (let i = 0; i < pairs.length; i++) { const [a, b] = pairs[i]; result.push(a + b); }
For + Push, Indices
result = []; for (let i = 0; i < pairs.length; i++) { result.push(pairs[i][0] + pairs[i][1]); }
For-Of + Push, Destructuring
result = []; for (const [a, b] of pairs) { result.push(a + b); }
For-Of + Push, Indices
result = []; for (const pair of pairs) { result.push(pair[0] + pair[1]); }
Map, destructured
result = pairs.map(([a, b]) => a + b);
Map, indices
result = pairs.map(pair => pair[0] + pair[1]);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (6)
Previous results
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Test case name
Result
For + Push, Destructuring
For + Push, Indices
For-Of + Push, Destructuring
For-Of + Push, Indices
Map, destructured
Map, indices
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **What is being tested?** The provided benchmark measures the performance of different approaches to concatenate strings in JavaScript: 1. **For loop with push**: `for (let i = 0; i < pairs.length; i++) { result.push(a + b); }` 2. **For loop with indices**: `for (let i = 0; i < pairs.length; i++) { result.push(pairs[i][0] + pairs[i][1]); }` 3. **For-of loop with destructuring**: `for (const [a, b] of pairs) { result.push(a + b); }` 4. **For-of loop with indices**: `for (const pair of pairs) { result.push(pair[0] + pair[1]); }` 5. **Map function with destructuring**: `result = pairs.map(([a, b]) => a + b);` 6. **Map function with indices**: `result = pairs.map(pair => pair[0] + pair[1]);` **Options compared** The benchmark compares the performance of different approaches to concatenate strings in JavaScript: * Using a traditional `for` loop with `push` (approach 1) * Using a `for` loop with indexed access to elements (approach 2) * Using a `for-of` loop with destructuring (approach 3) * Using a `for-of` loop with indexed access to elements (approach 4) * Using the `Map` function with destructuring (approach 5) * Using the `Map` function with indexed access to elements (approach 6) **Pros and cons of each approach** Here's a brief summary of the pros and cons of each approach: 1. **For loop with push**: Simple and straightforward, but may not be as efficient due to the overhead of `push`. * Pros: Easy to understand and implement. * Cons: May be slower than other approaches. 2. **For loop with indices**: Similar to approach 1, but uses indexed access instead of destructuring. * Pros: May be slightly faster than approach 1 due to reduced overhead. * Cons: Requires manual indexing, which can lead to errors. 3. **For-of loop with destructuring**: A concise and expressive way to iterate over arrays. * Pros: Elegant syntax, easy to read and maintain. * Cons: May not be as efficient due to the overhead of `for-of` loops. 4. **For-of loop with indices**: Similar to approach 3, but uses indexed access instead of destructuring. * Pros: May be slightly faster than approach 3 due to reduced overhead. * Cons: Requires manual indexing, which can lead to errors. 5. **Map function with destructuring**: A concise way to transform arrays using the `Map` function. * Pros: Elegant syntax, easy to read and maintain. * Cons: May not be as efficient due to the overhead of `Map` functions. 6. **Map function with indices**: Similar to approach 5, but uses indexed access instead of destructuring. * Pros: May be slightly faster than approach 5 due to reduced overhead. * Cons: Requires manual indexing, which can lead to errors. **Other considerations** When choosing an approach, consider the trade-offs between conciseness, readability, and performance. In general: * For small datasets or simple transformations, concise approaches (3-6) may be sufficient. * For larger datasets or more complex transformations, efficient approaches (1-4) may be preferred. **Alternative approaches** Other alternatives to consider when concatenating strings in JavaScript include: * Using the `join` method: `result = pairs.join('');` * Using template literals: `result = pairs.map(pair => `${pair[0]}${pair[1]}`).join('');` However, these approaches may have their own trade-offs and may not be as efficient or concise as the options listed above.
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