Benchmark: arr[item] vs a < 5 && b > 0

Script Preparation code:

var str = (new Array(100)).map((item, index)=>index + '');
var a = 1;
var b = 10;
var i;
var noop = Function.prototype;

Tests:

a > 0 && b < 1e5
i = 1e4; a = 0; b = 1e5 while (i--) if (a > 0 && b < 1e5 && (str[a] === str[b])) { a++; b--; noop() }
str[a]
i = 1e4; a = 0; b = 1e5 while (i--) if (str[a] && (str[a] === str[b])) { a++; b--; noop() }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
a > 0 && b < 1e5
str[a]

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):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Overview**
The test measures the performance of accessing an array element (`arr[item]`) versus comparing two expressions using the logical AND operator (`a < 5 && b > 0`).

**Script Preparation Code**
The script preparation code creates a string `str` with 100 elements, each containing a unique index from 0 to 99. Two variables `a` and `b` are also initialized with values 1 and 10, respectively.

**Html Preparation Code (empty)**
There is no HTML preparation code provided, which means the test only runs in the browser's JavaScript engine.

**Individual Test Cases**

### Test Case 1: "a > 0 && b < 1e5"
This test case uses a `while` loop to iterate 100 times. Inside the loop, it checks if `a` is greater than 0 and `b` is less than 10^5 (100,000). If both conditions are true, it increments `a`, decrements `b`, and calls a no-op function (`noop()`).

**Library: None**
This test case doesn't rely on any external libraries.

**Special JS Feature/Syntax: None**
There's no special JavaScript feature or syntax used in this test case.

### Test Case 2: "str[a]"
This test case uses another `while` loop to iterate 100 times. Inside the loop, it checks if the element at index `a` (accessed through `str`) is truthy. If it's truthy, it increments `a`, decrements `b`, and calls a no-op function (`noop()`).

**Library: None**
This test case doesn't rely on any external libraries.

**Special JS Feature/Syntax:** The use of bracket notation (`str[a]`) to access an array element is a standard JavaScript feature. However, the use of truthy values (i.e., non-empty strings) as array indices might be considered a edge case or a special behavior in certain browsers.

**Other Alternatives**
If MeasureThat.net didn't have this benchmark, you could create a similar test using other benchmarking tools, such as:

* Browser-specific benchmarks like Google Chrome's built-in benchmarking tool or Mozilla's WebAssembly benchmark.
* General-purpose benchmarking frameworks like Benchmark.js orBenchmark.com.
* Online JavaScript performance testing platforms like jsPerf or jsBench.

Keep in mind that the choice of benchmarking tool or platform depends on your specific use case, target audience, and desired level of accuracy.

Related benchmarks:

arr[item] vs a < 5 && b > 0 (version: 0)

Comparing performance of: a > 0 && b < 1e5 vs str[a]

Created: 4 years ago by: Registered User

Jump to the latest result

a > 0 && b < 1e5

str[a]

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):