Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
for vs forEach222
(version: 0)
Comparing performance of:
for vs forEach
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
window.data = [{n: 1},{n: 2},{n: 3},{n: 4},{n: 5},{n: 7},{n: 9},]
Tests:
for
for(let i = data.length - 1;i>=0; i--){ const item = data[i] item.n++ }
forEach
data.forEach(item => item.n++)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
for
forEach
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
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 tests two different ways to increment a value in an array using JavaScript: `forEach` and traditional `for` loops. The test uses a predefined dataset with six elements, where each element has a property `n` that needs to be incremented. **Options compared** In this benchmark, we have: 1. **Traditional `for` loop**: This approach uses a manual counter (`i`) to iterate over the array elements. It's a simple and straightforward way to perform iteration. 2. **`forEach` method**: This is a built-in JavaScript method that allows iterating over arrays or iterable objects without explicit indexing. **Pros and Cons** * **Traditional `for` loop**: + Pros: Generally faster, as it avoids the overhead of function calls and object lookup. It's also easier to optimize for specific use cases. + Cons: Requires manual indexing, which can lead to off-by-one errors or issues with array sizes. * **`forEach` method**: + Pros: Easier to read and maintain, as it abstracts away the iteration logic. It's also suitable for most modern JavaScript applications. + Cons: Might be slower than traditional loops due to the overhead of function calls and object lookup. **Library usage** In this benchmark, we don't see any explicit library usage besides the built-in `forEach` method and traditional `for` loop constructs. **Special JS feature/syntax** There are no special JavaScript features or syntax used in this benchmark beyond what's standard. The only notable aspect is the use of template literals (`\r\n`) for multi-line string concatenation, but this is a common practice in JavaScript development. **Other alternatives** If you were to write a similar benchmark using alternative approaches, you might consider: * **`while` loop**: Another traditional looping construct that can be used instead of `for`. * **`map()` method**: While not exactly equivalent to `forEach`, the `map()` method can also be used for array iteration with some adjustments. * **Callback functions**: Instead of using `forEach`, you could use callback functions to perform the desired operation on each element. **Benchmark preparation code analysis** The provided script preparation code defines an array `data` and assigns it to `window.data`. The HTML preparation code is empty, suggesting that this benchmark focuses on JavaScript execution rather than rendering or event handling performance.
Related benchmarks:
Iteration through array; of vs forEach
for vs foreach t23
for of vs forEach with console log
aaplya for vs forEach
Comments
Confirm delete:
Do you really want to delete benchmark?