Benchmark: Incldues split vs indexOf

Script Preparation code:

var myStr = 'admin,researcher,customer'

Tests:

indexOf
if (myStr.indexOf('admin') > -1) { console.log('true') }
split
if (myStr.split(',').includes('admin')) { console.log('true') }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
split

Fastest: N/A

Slowest: N/A

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Let's break down the benchmark definition and test cases to understand what is being tested.

**Benchmark Definition**

The benchmark defines two script preparation codes:

1. `var myStr = 'admin,researcher,customer';` - This code creates a string variable `myStr` with a comma-separated list of values.
2. The script preparation code is empty for HTML preparation (`"Html Preparation Code": null`). This suggests that the benchmark focuses solely on JavaScript performance.

**Individual Test Cases**

There are two test cases:

1. **indexOf**: This test case uses the `indexOf()` method to search for the string "admin" within the `myStr` variable. The code is:
```
if (myStr.indexOf('admin') > -1) { console.log('true') }
```
The `indexOf()` method returns the index of the first occurrence of the specified value, or -1 if it's not found.

2. **split**: This test case uses the `split()` method to split the comma-separated string into an array and then uses the `includes()` method to check if "admin" is present in the resulting array. The code is:
```
if (myStr.split(',').includes('admin')) { console.log('true') }
```
The `split()` method returns an array of substrings, where each substring is a value from the original string separated by commas.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **indexOf**:
	* Pros:
		+ Efficient for finding a specific value within a large string.
		+ Returns an index, which can be used to access other values in the string.
	* Cons:
		+ Can return -1 if the value is not found, which may lead to false positives or errors.
		+ May not work well with strings containing non-ASCII characters.
2. **split**:
	* Pros:
		+ Allows for more flexibility in handling comma-separated values.
		+ Returns an array of substrings, making it easier to process multiple values.
	* Cons:
		+ Can be slower than `indexOf()` if the string is large and the value is not found.
		+ May require additional processing to handle edge cases (e.g., empty strings).

**Library**

There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that the `includes()` method is a part of the ECMAScript standard, which has been supported by most modern browsers since 2015.

**Special JS Feature/Syntax**

The use of template literals (e.g., `'admin,researcher,customer'`) and array destructuring (`myStr.split(',')`) are features that have become more widely adopted in recent years. Template literals provide a concise way to create string values, while array destructuring allows for more expressive and readable code when working with arrays.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are some options:

1. **Use a regular expression**: Instead of `indexOf()` or `split()`, you could use regular expressions to search for patterns within the string.
2. **Use a different data structure**: Consider using an object or a map to store the comma-separated values instead of a string.
3. **Use a streaming approach**: If you're working with very large strings, consider using a streaming approach that processes the input in chunks rather than loading it all into memory at once.

Keep in mind that these alternatives may have different performance characteristics and requirements for implementation.

Related benchmarks:

Incldues split vs indexOf (version: 0)

Comparing performance of: indexOf vs split

Created: 3 years ago by: Guest

Jump to the latest result

indexOf

split

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):