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replace vs split/join by Alex
(version: 0)
Comparing performance of:
replace vs split & join
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var s = "1\n2\n3\n4\n5\n6\n7\n8\n9";
Tests:
replace
s.replace(/\n/g, '<br>');
split & join
s.split('\n').join('<br>');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
replace
split & join
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser/OS:
Chrome 126 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=534712" width="100%" height="500px"></iframe>
split & join
4.2M/s
replace
3.8M/s
View exact numbers
Test name
Executions per second
✓
split & join
4,167,738 Ops/sec
replace
3,814,492 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks and explore what's being tested on MeasureThat.net. **Benchmark Description** The benchmark is designed to compare two approaches for replacing newline characters (`\n`) with HTML breakpoints (`<br>`) in a string. The test case uses a sample string `s` containing 9 lines of text, separated by newline characters. **Options Compared** There are two options being compared: 1. **`.replace()` method**: This is a built-in JavaScript method that replaces all occurrences of a specified pattern (in this case, `\n`) with a replacement value (`<br>`). 2. **`.split()` and `.join()` methods**: These are also built-in JavaScript methods. `split()` splits the string into an array of substrings using a separator (in this case, `\n`), and then `join()` concatenates the array elements back into a single string with the specified separator (`<br>`). **Pros and Cons** Here's a brief summary of the pros and cons of each approach: 1. **`.replace()` method**: * Pros: Fast, efficient, and widely supported. * Cons: Can be overkill for simple replacement tasks, may not work correctly with certain edge cases (e.g., Unicode newline characters). 2. **`.split()` and `.join()` methods**: * Pros: More flexible than `.replace()`, can handle multiple separators, and works well with arrays of substrings. * Cons: Slightly slower than `.replace()`, may require additional memory allocation. **Library** None **Special JS Feature or Syntax** There is no special JavaScript feature or syntax being used in this benchmark. The code relies solely on built-in methods and basic JavaScript syntax. **Other Alternatives** If you're looking for alternative approaches to replace newline characters, you could consider using: 1. **Regex alternatives**: Instead of `.replace()` or `split()` and `join()`, you could use other regex-based approaches, such as using the `String.prototype.replace()` method with a custom callback function. 2. **Library functions**: Depending on your specific requirements, you might need to use a library like jQuery's `text()` method or a dedicated string manipulation library like underscore.js's `stringify()` function. Keep in mind that these alternatives may offer different performance characteristics, and it's essential to benchmark your specific use case to determine the best approach.
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