Benchmark: debounce test 2 - MeasureThat.net

Tests:

without debouce
const a = 1; const b = 2; const c = 3; let i = 0; const onScroll = () => { if (a > 2 && b > 3 && c > 4) { } } for (let i = 0; i < 1000; i++) { onScroll(); }
with debounce
const a = 1; const b = 2; const c = 3; let j = 0; let timer = null; const onScrollDebounced = () => { if (timer) clearTimeout(timer); timer = setTimeout(() => { if (a > 2 && b > 3 && c > 4) { } }, 100) } for (let i = 0; i < 1000; i++) { onScrollDebounced(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
without debouce
with debounce

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.

**Overview of the Benchmark**

The provided benchmark is designed to test the performance of JavaScript functions with and without debouncing, which is a technique used to prevent a function from being called too frequently.

**Debouncing**

Debouncing is an optimization technique that ensures a function (in this case, `onScroll`) is not executed too often. Instead of checking if a condition has changed every time the function is called, debouncing waits for a specified amount of time (`100ms` in this case) before re-checking the condition. If the condition hasn't changed during that time, the function is skipped.

**Options Compared**

The benchmark compares two approaches:

1. **Without Debounce**: The `onScroll` function is called every iteration of the loop (1000 times). This means the function is executed rapidly, and the browser has to work harder to process these frequent calls.
2. **With Debounce**: The `onScrollDebounced` function is called with a 100ms delay using `setTimeout`. This introduces a delay between each call, allowing the browser to reduce the load on its event loop.

**Pros and Cons of Each Approach**

* **Without Debounce**:
	+ Pros: None
	+ Cons:
		- The function is executed rapidly, which can lead to performance issues.
		- The browser has to work harder to process frequent calls, increasing CPU usage and memory allocation.
* **With Debounce**:
	+ Pros:
		- Reduces the load on the event loop, leading to improved performance.
		- Allows for more efficient handling of frequent events.
	+ Cons:
		- Introduces a delay between each call, which might not be desirable in all cases.

**Library and Special JS Feature**

There is no library explicitly mentioned in the benchmark definition or individual test cases. However, it's worth noting that some JavaScript environments (e.g., Node.js) provide built-in support for timers and event loops, while others might rely on external libraries.

**Other Considerations**

* **Browser Behavior**: The browser's behavior can significantly impact the results of this benchmark. Different browsers handle events and execution schedules differently.
* **JavaScript Engine Optimizations**: Modern JavaScript engines often introduce optimizations that can affect the performance of debouncing functions. For example, some engines might use techniques like caching or precomputation to reduce the number of function calls.

**Alternatives**

If you're interested in exploring alternative approaches to debouncing, consider the following:

* **Throttling**: Instead of using `setTimeout`, throttling uses a fixed rate (e.g., 10 times per second) to limit the frequency of event executions.
* **RequestAnimationFrame**: This API allows for more efficient rendering and animation by executing code during specific frames.
* **Caching or Memoization**: Storing previously computed results can help reduce the number of function calls, making the overall system more responsive.

In conclusion, this benchmark is designed to test the performance impact of debouncing on JavaScript functions. By comparing two approaches, we can gain insight into the benefits and drawbacks of debouncing techniques, helping us make informed decisions about when to use them in our own code.

Related benchmarks:

debounce test 2 (version: 0)

Comparing performance of: without debouce vs with debounce

Created: 6 years ago by: Guest

Jump to the latest result

without debouce

with debounce

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):