Benchmark: ffwawfeawfeawfe - MeasureThat.net

Script Preparation code:

const str = 'hey can i be in ';
const shortx = 'hey c';
const noop = Function.prototype;

Tests:

sw
const str = 'hey can i be in ';const shortx = 'hey c';const noop = Function.prototype;if (str.startsWith(`hey can i be in `)) noop();
slice
const str = 'hey can i be in ';const shortx = 'hey c';const noop = Function.prototype;if (str.slice(16) === `hey can i be in `) noop();
shortx
const str = 'hey can i be in ';const shortx = 'hey c';const noop = Function.prototype;if (shortx.slice(16) === `hey can i be in `) noop();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
sw
slice
shortx

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the details of this benchmark.

**Benchmark Description**
The benchmark is testing different methods for checking if a string starts with a specific prefix.

**Test Cases**

We have three test cases:

1. **"sw" (startsWith)**: This test case uses the `startsWith` method to check if the string `'hey can i be in '` starts with the same string.
2. **"slice"**: This test case uses the `slice` method to extract a substring from index 16 to the end of the string, and then checks if the extracted substring is equal to `'hey can i be in '`.
3. **"shortx"**: Similar to "slice", this test case uses the `slice` method but starts extracting from index 16 of another shorter string `'hey c'`, and then checks if the extracted substring is equal to `'hey can i be in '`.

**Tested Options**
The benchmark is comparing three different options for checking if a string starts with a specific prefix:

1. **Using `startsWith` method**: This is the most straightforward approach, which uses the `startsWith` method provided by JavaScript's String prototype.
2. **Using `slice` method with substring check**: This approach extracts a substring from the original string using the `slice` method and then checks if it matches the target prefix.
3. **Using `slice` method with another shorter string**: Similar to the previous option, but starts extracting from a shorter string `'hey c'`.

**Pros/Cons of Different Approaches**

* **startsWith method**:
	+ Pros: Most efficient and straightforward approach, uses native JavaScript implementation.
	+ Cons: None notable cons in terms of performance or readability.
* **slice with substring check**:
	+ Pros: Can be useful if you need to extract a part of the original string for further processing.
	+ Cons: May be less efficient than `startsWith` method due to additional overhead of creating a new substring and comparing it.
* **slice with another shorter string**:
	+ Pros: Can be useful if you have an existing shorter string that you can use as a prefix.
	+ Cons: May be less efficient than `startsWith` or `slice` with substring check, depending on the length of the shorter string.

**Other Considerations**

* **Library**: There is no external library used in this benchmark. The tests rely solely on built-in JavaScript methods and syntax.
* **Special JS feature or syntax**: None notable special features or syntax are used in this benchmark.

**Alternatives**
If you need to check if a string starts with a specific prefix, consider using the `startsWith` method, which is the most efficient and straightforward approach. If you need to extract a part of the original string for further processing, use the `slice` method with substring check.

Related benchmarks:

ffwawfeawfeawfe (version: 0)

Compare methods for testing string's beggining character.

Comparing performance of: sw vs slice vs shortx

Created: 6 years ago by: Guest

Jump to the latest result

sw

slice

shortx

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):