Benchmark: adasdd - MeasureThat.net

Script Preparation code:

var test = "test";

Tests:

a[0]
var b = test[0];
charAt(0)
var b = test.charAt(0);
substr
var b = test.substr(0,1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
a[0]
charAt(0)
substr

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
a[0]	16739498.0 Ops/sec
charAt(0)	16764064.0 Ops/sec
substr	16919468.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition JSON**

The provided `Benchmark Definition` JSON object defines a benchmark that runs a JavaScript script in a browser environment. The script consists of three parts:

1. A string variable `test` initialized with the value `"test"`.
2. Two variables, `b`, defined using different methods to extract the first character from the `test` string:
	* Using array indexing (`a[0]`)
	* Using the `charAt(0)` method
	* Using the `substr(0,1)` method

**Test Cases**

The individual test cases are represented by JSON arrays. Each test case has two parts:

1. A `Benchmark Definition` string that defines the JavaScript code to be executed in the benchmark.
2. A `Test Name` string that corresponds to one of the three variables (`b`) defined earlier.

In other words, each test case is a variation of the benchmark script with different methods used to extract the first character from the `test` string.

**Options Compared**

The options being compared are:

1. **Array indexing (a[0])**: This method involves accessing the first element of an array (`test`) using square brackets (`[]`). The performance impact of this approach is likely to be minimal, as it's a straightforward operation.
2. **`charAt(0)`** : This method uses the `charAt()` function to extract the character at the specified position (in this case, position 0). This method may have some overhead due to the additional function call and string lookup.
3. **`substr(0,1)`**: This method uses the `substr()` function to extract a substring from the original string (`test`). While it seems more efficient than `charAt(0)`, it's likely slower than array indexing because it involves creating a new substring object.

**Pros and Cons**

* **Array Indexing (a[0])**:
	+ Pros: Fast, lightweight operation with minimal overhead.
	+ Cons: May not be intuitive for developers without familiarity with arrays.
* **`charAt(0)`**:
	+ Pros: More readable and maintainable than array indexing.
	+ Cons: Additional function call and string lookup may introduce performance overhead.
* **`substr(0,1)`**:
	+ Pros: Efficient way to extract a substring from the original string.
	+ Cons: May have higher overhead due to creating a new substring object.

**Library Use**

None of the provided benchmark definitions use any external libraries.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition. The code is straightforward and uses standard JavaScript methods for array indexing, string manipulation, and function calls.

**Alternative Approaches**

Other alternatives to compare these benchmarks could include:

* Using a different data structure, such as an object instead of an array.
* Implementing custom string processing functions using bit-level operations or optimized algorithms.
* Using parallel processing techniques to execute the benchmarks concurrently on multiple cores.
* Comparing performance using different JavaScript engines or runtime environments.

Keep in mind that these alternatives would require significant modifications to the benchmark definition and test cases, but they could provide additional insights into the performance characteristics of different approaches.

Related benchmarks:

adasdd (version: 0)

Comparing performance of: a[0] vs charAt(0) vs substr

Created: 3 years ago by: Guest

Jump to the latest result

a[0]

charAt(0)

substr

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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