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trim vs replace
(version: 0)
Comparing performance of:
trime vs replace
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var example = ' there is no spoon'
Tests:
trime
var r = example.trim()
replace
var r = example.replace(/^\s/g, '')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
trime
replace
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Browser/OS:
Chrome 136 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=604620" width="100%" height="500px"></iframe>
Test name
Executions per second
trime
133360776.0 Ops/sec
replace
42929604.0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases to understand what's being tested. **Benchmark Definition:** The benchmark is comparing two approaches for string trimming in JavaScript: 1. `trim()` 2. `replace()` with a regular expression (`^\\s/g`) **Options Compared:** * `trim()`: A built-in JavaScript method that removes whitespace characters from the start and end of a string. * `replace()` with regular expression (`^\\s/g`): A built-in JavaScript method that replaces occurrences of a pattern in a string. In this case, the pattern is one or more whitespace characters (`\\s`) at the start of the string (`^`), and the replacement value is an empty string (`''`). **Pros and Cons:** * `trim()`: Pros: + Simple and efficient + Works on most strings (including those with multiple consecutive whitespace characters) * Cons: + May not remove all whitespace characters, especially if they appear inside the string + Can be slower than `replace()` for large strings * `replace()` with regular expression (`^\\s/g`): Pros: + More flexible and powerful than `trim()`, allowing for more complex pattern matching + Can handle strings with multiple consecutive whitespace characters * Cons: + Requires more code to set up the regular expression pattern + May be slower than `trim()` for simple cases **Library Used:** None. Both `trim()` and `replace()` are built-in JavaScript methods. **Special JS Feature/Syntax:** The test case uses the `g` flag in the `replace()` method, which stands for "global" and allows the replacement to occur on all occurrences of the pattern, not just the first one. This is a common feature used when working with regular expressions in JavaScript. **Other Alternatives:** * Other methods that can be used for string trimming in JavaScript include: + `substring()` or `slice()`: These methods allow you to extract a subset of characters from the original string. + A custom function using `String.prototype.replace()` with a regular expression * Alternative approaches for comparing these two methods might include testing other string manipulation methods, such as `split()`, `join()`, or `concat()`.
Related benchmarks:
Fastest way to detect an empty string
Replace text vs slice text
replace vs. slice
trim() vs replace()
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