Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
String from Charcode test with ...
(version: 0)
Comparing performance of:
For-loop vs String.fromCharCode.apply vs ... iterator to array
Created:
6 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var chars = [239,15,2,1,227,15,118,2,68,63,49,59,56,90,0,44,15,143,1,206,15,251,7,255,56,15,43,2,206,15,225,0,255,74,15,135,3,255,56,15,74,1,71,15,0,3,255,74,15,92,1,242,15,172,8,44,15,63,0,107,15,194,1,242,15,5,1,224,15,118,2,65,15,184,11,255,17,63,49,59,56,234,6,71,15,90,0,218,15,180,3,224,15,243,0,255,56,15,42,3,218,15,237,0,161,15,235,2,255,56,15,74,1,255,8,15,3,9,65,15,84,0,86,15,215];
Tests:
For-loop
var s = ""; for(var i=0,l=chars.length; i<l; i++) s += String.fromCharCode(chars[i]);
String.fromCharCode.apply
var s = String.fromCharCode.apply(null, chars);
... iterator to array
var s = String.fromCharCode(...chars);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
For-loop
String.fromCharCode.apply
... iterator to array
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down what's being tested in the provided benchmark. **Benchmark Purpose** The benchmark measures the performance of three different ways to create a string from an array of character codes: 1. **For-loop**: Iterating over the character code array and appending each code to a string using `String.fromCharCode`. 2. **String.fromCharCode.apply**: Using the `apply` method to call `String.fromCharCode` with the entire character code array as arguments. 3. **... iterator to array**: Using the spread operator (`...`) to convert the character code array into an iterator, which is then passed to `String.fromCharCode`. **Options Compared** These three approaches are being compared to determine which one performs best in terms of execution speed. **Pros and Cons:** * **For-loop**: This approach requires manual iteration over the array, which can be slow. However, it allows for fine-grained control over the loop. * **String.fromCharCode.apply**: This approach uses a built-in method with optimized performance. It's likely to be faster than the for-loop, but might have some overhead due to the `apply` method call. * **... iterator to array**: This approach is concise and efficient, as it leverages the built-in iterator protocol in JavaScript. However, it requires an understanding of iterators and may not be immediately obvious to all developers. **Libraries and Special JS Features:** None mentioned explicitly, but we can assume that `String.fromCharCode` is a built-in method in JavaScript. **Other Considerations:** * **Browser Variability**: The benchmark results are for Firefox 92 on Windows. Different browsers or versions might exhibit different performance characteristics. * **Code Quality and Readability**: While performance is important, code readability and maintainability should not be sacrificed. A good balance between the two is essential. **Alternatives:** If you were to implement this benchmark from scratch, you could also consider using other approaches, such as: * Using a library like `console.time` or `performance.now()` to measure execution time. * Creating a custom iterator implementation for the character code array. * Comparing performance with different string concatenation methods (e.g., `+`, `.join()`, etc.). Keep in mind that these alternatives might not offer significant improvements over the original benchmark, but they could provide additional insights into specific optimization techniques.
Related benchmarks:
String from Charcode test
String from Charcode test 2
String.fromCharCode & btoa vs base64ArrayBuffer function FIXED - big arrayBuffer
String from Charcode cached (deg)
Comments
Confirm delete:
Do you really want to delete benchmark?