Benchmark: indexOf vs while vs for

Script Preparation code:

var tt = ['table','tr','td'];
var f = 'tr';

Tests:

while dec
let i = tt.length while (i) { if (tt[--i] === f) return i } return -1
indexOf
return tt.indexOf(f)
for
for (let i = 0, l = tt.length; i<l; ++i) { if (tt[i] === f) return i } return -1

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
while dec
indexOf
for

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 dive into the world of JavaScript microbenchmarks!

**Benchmark Overview**

The provided JSON represents a benchmark named "indexOf vs while vs for" where users can compare the performance of three different approaches: `indexOf`, `while`, and `for` loops. The benchmark aims to measure which approach is the fastest in finding a specific element within an array.

**Script Preparation Code**

The script preparation code `var tt = ['table','tr','td'];\r\nvar f = 'tr';` creates two variables:

* `tt`: an array of strings containing table-related elements.
* `f`: a string representing the target element to search for (`"tr"`).

This code is executed before each test case.

**Individual Test Cases**

There are three test cases:

1. **while dec**: This test case uses a while loop with decrementing indices (`tt[--i]`) to find the target element.
2. **indexOf**: This test case uses the built-in `indexOf()` method of JavaScript arrays, which returns the index of the first occurrence of the target element if it exists.
3. **for**: This test case uses a traditional for loop with an iterator variable (`tt[i]`) to find the target element.

**Library Usage**

There is no explicit library mentioned in the benchmark definition or script preparation code. However, the `indexOf()` method is a built-in JavaScript function that relies on various libraries and algorithms under the hood (e.g., V8 engine in Chrome). The while loop and for loop implementations are not built-in functions but rather standard JavaScript syntax.

**Special JS Features/Syntax**

None of the test cases explicitly use special JavaScript features or syntax, such as async/await, `let` or `const` declarations, ES6 classes, etc.

**Benchmark Results**

The provided benchmark results show the performance data for each test case:

* **while dec**: 4,265,411 executions per second
* **indexOf**: 2,857,713 executions per second
* **for**: 2,826,205 executions per second

These results indicate that the `while` loop is the fastest approach in this specific benchmark, followed closely by the `for` loop.

**Other Alternatives**

If you're interested in exploring alternative approaches or libraries for this kind of benchmarking, consider the following:

* Use other JavaScript array methods like `find()`, `includes()`, or `filter()` which might be more efficient than `indexOf()` in certain cases.
* Implement custom search algorithms using data structures like hash tables, binary searches, or trie data structures.
* Experiment with WebAssembly (WASM) or other compilation targets to optimize performance.
* Use specialized benchmarking libraries like Benchmark.js, Microbenchmark, or jsperf.

Related benchmarks:

indexOf vs while vs for (version: 0)

Comparing performance of: while dec vs indexOf vs for

Created: 7 years ago by: Guest

Jump to the latest result

while dec

indexOf

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):