Benchmark: indexOf vs for - MeasureThat.net

Script Preparation code:

var arrays = ['date1', 'date2', 'date3', 'date4', 'date5', 'date6', 'date7', 'date8', 'date9', 'date10', 'date11', 'date12', 'date13', 'date14', 'date15'],
    fullDates= 'date1date2date3date4date5date6date7date8date9date10date11date12date13date14date15',
    i =0,
    j = arrays.lenght,
    isThere = false,
    val = 'date8';

Tests:

indexOf
isThere = fullDates.indexOf(val) >= 0;
Match
isThere = fullDates.match(val);
For
for(i; i < j; i++) { if(arrays[i] === val) { isThere = true; breake; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
Match
For

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Overview**

The benchmark measures the performance of three different approaches to find a specific string within an array:

1. `indexOf` (using the built-in JavaScript method)
2. `Match` (using the `String.prototype.match()` method)
3. `For` (using a traditional loop)

**Options Compared**

The three options are compared in terms of their execution time, measured in executions per second.

**Pros and Cons of Each Approach**

1. **indexOf**: This is the most efficient approach, as it uses an optimized binary search algorithm to find the string within the array.
	* Pros: Fastest execution time
	* Cons: May not work correctly if the string is not found, and may throw an error if the string is null or undefined.
2. **Match**: This method returns all non-empty strings that match the regular expression, so it's not as efficient as `indexOf`.
	* Pros: Can be useful in certain situations where you need to find all matching strings
	* Cons: Much slower than `indexOf`
3. **For**: This approach uses a traditional loop to iterate through the array and check for matches.
	* Pros: Easy to understand and implement
	* Cons: Slowest execution time, as it involves iterating through the entire array

**Library Used**

In this benchmark, no libraries are used beyond the built-in JavaScript methods.

**Special JS Feature or Syntax**

None of the test cases use any special JavaScript features or syntax beyond what's considered standard in modern JavaScript (ES6+).

**Other Considerations**

When choosing an approach, consider the specific requirements of your application:

* If you need to find a string within an array and don't care about other matches, `indexOf` is likely the best choice.
* If you need to find all matching strings, `Match` might be suitable. However, this approach can be slower and less efficient than `indexOf`.
* If readability and simplicity are more important than performance, the `For` loop might be a better option.

**Alternatives**

If you're interested in exploring alternative approaches or optimizing these test cases further:

* For `indexOf`, you could consider using `Array.prototype.indexOf()` instead of the built-in method.
* For `Match`, you could explore other regular expression methods, such as `String.prototype.search()`.
* For `For`, you could optimize the loop by using early termination conditions (e.g., checking if `val` is already found) or caching intermediate results.

Keep in mind that the performance differences between these approaches are relatively small for small arrays. However, for larger datasets, one of these methods will be significantly faster than the others.

Related benchmarks:

indexOf vs for (version: 0)

Comparing performance of: indexOf vs Match vs For

Created: 9 years ago by: Guest

Jump to the latest result

indexOf

Match

For

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):