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Do While vs For loop
(version: 0)
Benchmark.js
Comparing performance of:
For loop vs While loop
Created:
4 years ago
by:
Guest
Go to the latest result
Tests:
For loop
var acts = "BRA|BRA|FLR|VSL|BRA".split("|"); for (var i = 0; i < acts.length -1; i++) { if (acts[i] == "BRA") acts.splice(i, 1); }
While loop
var acts = "BRA|BRA|FLR|VSL|BRA".split("|"); var i = acts.length; do { if (acts[i] == "BRA") acts.splice(i, 1); } while (i--)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
For loop
While loop
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
6 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0
Browser/OS:
Firefox 148 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=626437" width="100%" height="500px"></iframe>
For loop
9.7M/s
While loop
5.5M/s
View exact numbers
Test name
Executions per second
✓
For loop
9,672,219 Ops/sec
While loop
5,452,262 Ops/sec
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 tested?** The provided benchmark compares two approaches to remove consecutive occurrences of "BRA" from a string using loops: `For loop` and `While loop`. **Options compared** 1. **For loop**: This approach uses a traditional `for` loop with an iterator (`i`) that increments from 0 to the length of the string minus 1. 2. **While loop**: This approach uses a `do-while` loop, which is similar to a `for` loop but starts executing the code immediately and then checks a condition at the end. **Pros and Cons** * **For loop**: + Pros: Can be more straightforward and easier to understand for some developers. + Cons: May not be as efficient due to the overhead of the loop counter and increment operation. * **While loop (do-while)**: + Pros: Can be more efficient since it only checks the condition once per iteration, reducing overhead. + Cons: Might be less intuitive for some developers who are not familiar with `do-while` loops. **Library usage** There is no explicit library used in these benchmark definitions. However, JavaScript's built-in methods and operators are leveraged to achieve the desired functionality. **Special JS feature or syntax** * The `split()` method is used to split the string into an array of substrings. * The `splice()` method is used to remove consecutive occurrences of "BRA" from the array. **Other considerations** * The benchmark only focuses on the performance difference between these two approaches and does not consider other factors like code readability, maintainability, or scalability. * MeasureThat.net's goal is to provide a simple and repeatable way for developers to compare different JavaScript implementations and identify performance bottlenecks in their own code. **Alternatives** If you're interested in exploring alternative approaches, here are some options: 1. **Using `Array.prototype.filter()`**: Instead of using loops to remove consecutive occurrences of "BRA", you can use the `filter()` method to achieve the same result. 2. **Using regular expressions**: Regular expressions can be used to match and remove consecutive occurrences of "BRA" from a string in a more concise way. 3. **Using array methods like `reduce()` or `map()`**: These methods can be used to transform the array and remove consecutive occurrences of "BRA". Here's an example of how you could rewrite the benchmark using `Array.prototype.filter()`: ```javascript var acts = ["BRA|BRA|FLR|VSL|BRA"].split("|"); acts = acts.filter((value) => value !== "BRA").join("|"); ``` Keep in mind that these alternative approaches might have different performance characteristics and trade-offs, which could affect the results of your benchmark.
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