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Trim vs regex
(version: 0)
Check for valid input by doing string.trim() or /./.test(text)
Comparing performance of:
test vs trim
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var text = 'Heleleleslsl sds as'
Tests:
test
/./.test(text)
trim
text.trim().length !== 0
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
test
trim
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0
Browser/OS:
Firefox 135 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=590358" width="100%" height="500px"></iframe>
Test name
Executions per second
test
42354940.0 Ops/sec
trim
1721156480.0 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. **Benchmark Overview** The provided benchmark tests two approaches for checking if a string is not empty: using the `trim()` method or regular expressions (`/./.test(text)`). **Approach 1: Using `trim()` This approach uses the `trim()` method, which removes whitespace from both ends of a string. The benchmark definition code is `text.trim().length !== 0`. This means that if the trimmed length of the input string is not equal to zero, it's considered valid. **Pros** * Simple and straightforward implementation. * Fast execution speed due to the optimized native JavaScript method. * Easy to understand and maintain. **Cons** * May remove leading whitespace characters that are not spaces (e.g., tabs or newline characters). * Can be slower than regular expressions for very short strings. **Approach 2: Using Regular Expressions (`/./.test(text)`)** This approach uses a simple regular expression `/./` to test if the string is empty. The benchmark definition code is `./.test(text)`. This means that as long as the regex matches the input string (i.e., returns `true`), it's considered valid. **Pros** * Can handle non-space whitespace characters correctly. * May be faster than `trim()` for very short strings due to the optimized regex engine. **Cons** * Less intuitive and less readable compared to `trim()`. * May lead to slower execution speed in older JavaScript engines or with large input strings. **Library: RegExp** The regular expression library is built into JavaScript and provides an efficient way to match patterns against strings. In this case, the `/./` regex pattern is used to test if the string is empty. **Special JS Feature/Syntax: None** There are no special JavaScript features or syntaxes being tested in this benchmark. **Other Alternatives** If you wanted to improve or modify the benchmark, here are some alternatives: * Compare performance with other regular expression patterns (e.g., `/^\s+$/` for matching only whitespace characters). * Test both approaches with different input string lengths and distributions. * Add more tests for edge cases, such as empty strings, null/undefined inputs, or non-string values. I hope this explanation helps you understand the JavaScript microbenchmark on MeasureThat.net!
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