Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
replaceAll native vs regex replace..
(version: 1)
Comparing performance of:
replace regex vs replace All
Created:
one year ago
by:
Guest
Jump to the latest result
Tests:
replace regex
"this is it".replace(/ /g, "+");
replace All
"this is it".replaceAll(" ", "+");
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
replace regex
replace All
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/131.0.0.0 Safari/537.36
Browser/OS:
Chrome 131 on Mac OS X 10.15.7
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=579416" width="100%" height="500px"></iframe>
Test name
Executions per second
replace regex
15674524.0 Ops/sec
replace All
15332842.0 Ops/sec
Autogenerated LLM Summary
(model
gpt-4o-mini
, generated one year ago):
The benchmark presented tests two different methods for replacing characters in a string in JavaScript. Specifically, it compares the performance of using a regular expression with the `.replace()` method against the new `.replaceAll()` method introduced in ECMAScript 2021. ### Test Cases Overview 1. **Test Case 1: Replace using regex** - **Benchmark Definition:** `"this is it".replace(/ /g, "+");` - **Test Name:** "replace regex" - **Description:** This replaces all spaces in the string "this is it" with "+" using a regular expression. The `/ /g` denotes a global search for spaces. 2. **Test Case 2: Replace using replaceAll** - **Benchmark Definition:** `"this is it".replaceAll(" ", "+");` - **Test Name:** "replace All" - **Description:** This replaces all spaces in the same string using the newer `.replaceAll()` method, which simplifies the syntax for replacing all occurrences of a substring. ### Pros and Cons of Approaches #### Regex Replacement - **Pros:** - Flexible and powerful for more complex string manipulation (e.g., matching patterns). - Can handle multiple different characters or patterns in a single statement. - **Cons:** - More complex to write and understand for simple replacements. - Can be less performant, especially with large texts or complex expressions due to overhead involved in parsing and executing the regular expression. #### replaceAll Method - **Pros:** - Simplicity and readability: Easier to read and understand, especially for straightforward substitutions. - Potentially optimized for performance in straightforward replacements, as it does not require the regex engine. - **Cons:** - Limited only to string replacements, not suitable for pattern matching. - May not be available in older environments where ECMAScript 2021 is not supported, though it is now broadly available in modern browsers. ### Considerations and Alternatives When choosing between these methods, developers should evaluate their needs based on the task at hand: - For simple replacements, `.replaceAll()` is generally the best choice due to its clarity and ease of use. - For complex pattern matching and replacements, regular expressions with `.replace()` may be necessary. - Additionally, for scenarios requiring conditional or dynamic string replacements based on patterns, regex remains the go-to solution. ### Performance Insights The benchmark results show that both methods performed relatively similarly, with slight variations in execution speed: - **replace regex:** 15,674,524 executions per second - **replace All:** 15,332,842 executions per second This indicates that the performance difference in typical use cases might not be significant enough to deter developers from choosing the approach that best fits their use case for readability and maintainability. Given that both methods are available in modern JavaScript development environments, developers have the flexibility to select the approach that suits their specific circumstances while balancing performance with code clarity.
Related benchmarks:
standard replaceAll vs regex replace
replaceAll vs regex replace (no prep code)
JS replaceAll vs regex replace
replaceAll vs replace with /g
Global regex replace vs replaceAll
replaceAll native 2023 vs regex replace
replaceAll vs regex replace-09870987
replaceAll vs regex replace TEST
ReplaceAll vs Replace with regex
replaceAll vs regex replace native
Comments
Confirm delete:
Do you really want to delete benchmark?