Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Is "startsWidth" actually worth it?
(version: 0)
Comparing performance of:
startsWith vs The other way
Created:
4 years ago
by:
Guest
Jump to the latest result
Tests:
startsWith
'?foobar'.startsWith('?')
The other way
'?foobar'[0] === '?'
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
startsWith
The other way
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):
**Benchmark Overview** The provided JSON represents a JavaScript microbenchmark test on the MeasureThat.net website. The goal of this benchmark is to compare two approaches: using `startsWith()` and using indexing (`[]`) to check if a string starts with a specific character. **Options Compared** Two options are compared: 1. **`startsWith()`**: This method checks if a string starts with another string. 2. **Indexing (`[]`)**: This approach involves checking the first character of a string by indexing into an array created from the original string. **Pros and Cons of Each Approach** ### `startsWith()` Pros: * More readable and maintainable code, as it clearly conveys the intention of checking if a string starts with another. * Less error-prone, as the method is well-established and widely used. Cons: * May be slower due to the overhead of creating an internal array or searching for the substring. ### Indexing (`[]`) Pros: * Potential performance benefits due to the simplicity of indexing into an array created from the original string. * Can be more efficient in some cases, especially when dealing with large strings. Cons: * Less readable and maintainable code, as it relies on a less common and potentially confusing approach. * More error-prone, as a single incorrect index can lead to unexpected behavior or errors. **Library Usage** There is no library usage mentioned in the provided JSON. However, if we were to analyze the `startsWith()` method implementation, we would see that it uses the `indexOf()` method under the hood, which is part of the JavaScript standard library. The indexing (`[]`) approach, on the other hand, relies on manual string manipulation. **Special JS Features or Syntax** There are no special JavaScript features or syntax mentioned in the provided JSON. However, if we were to analyze the benchmark code, we might notice that it uses a feature called " template literals" (e.g., `'?foobar'`), which is a relatively modern and relatively new syntax introduced in ECMAScript 2015. **Other Alternatives** If you're looking for alternative approaches or libraries to benchmark, here are a few options: 1. **Benchmarking libraries**: Libraries like `benchmark.js`, `js-benchmark`, or `fastify` can help simplify the process of creating and running benchmarks. 2. **Other string comparison methods**: You might consider using other methods like `localeCompare()` or regular expressions (`RegExp.test()`) to compare strings. 3. **Alternative indexing approaches**: Depending on your specific use case, you might explore alternative indexing approaches, such as using a library like `lodash` or implementing a custom iterator. Keep in mind that the choice of approach ultimately depends on your specific requirements, performance constraints, and personal preference.
Related benchmarks:
toFixed vs toPrecision vs Math.round() vs Math.floorfaster test
toFixed() vs Math.round().toString()
toFixed vs toPrecision vs Math.round() to 1 decimal place
toFixed vs toPrecision vs Math.round() asd
parseFloat(toFixed) vs Math.round()
Comments
Confirm delete:
Do you really want to delete benchmark?