Benchmark: spread operator vs push test5

Tests:

spread operator true
const abc = true; const test = { a: { domain: undefined, iconName: "a", }, b: { domain: "b", iconName: "b", }, c: { domain: "c", iconName: "c", }, d: { domain: "d", iconName: "d", }, e: { domain: "e", iconName: "e", }, ...(abc ? {f: { domain: "f", iconName: "f", }} : {}), ...(abc ? {g: { domain: "f", iconName: "f", }} : {}), ...(abc ? {h: { domain: "f", iconName: "f", }} : {}), };
spread operator false
const abc = false; const test = { a: { domain: undefined, iconName: "a", }, b: { domain: "b", iconName: "b", }, c: { domain: "c", iconName: "c", }, d: { domain: "d", iconName: "d", }, e: { domain: "e", iconName: "e", }, ...(abc ? {f: { domain: "f", iconName: "f", }} : {}), ...(abc ? {g: { domain: "f", iconName: "f", }} : {}), ...(abc ? {h: { domain: "f", iconName: "f", }} : {}), };
Push true
const abc = true; const test = { a: { domain: undefined, iconName: "a", }, b: { domain: "b", iconName: "b", }, c: { domain: "c", iconName: "c", }, d: { domain: "d", iconName: "d", }, e: { domain: "e", iconName: "e", }, }; if (abc) { test.f = { domain: "f", iconName: "f", }; } if (abc) { test.g = { domain: "f", iconName: "f", }; } if (abc) { test.h = { domain: "f", iconName: "f", }; }
push false
const abc = false; const test = { a: { domain: undefined, iconName: "a", }, b: { domain: "b", iconName: "b", }, c: { domain: "c", iconName: "c", }, d: { domain: "d", iconName: "d", }, e: { domain: "e", iconName: "e", }, }; if (abc) { test.f = { domain: "f", iconName: "f", }; } if (abc) { test.g = { domain: "f", iconName: "f", }; } if (abc) { test.h = { domain: "f", iconName: "f", }; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread operator true
spread operator false
Push true
push false

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**Benchmark Purpose:**
The benchmark compares the performance of two ways to add properties to an object:

1. Using the spread operator (`...`)
2. Using the `concat()` method with `push`

**Options Compared:**

* **Spread Operator (`...`):** This is a new way to merge objects in JavaScript, introduced in ES6. It allows you to spread the properties of one object into another.
* **Concatenation using `concat()`**: This involves creating a new object by concatenating two or more objects together using the `concat()` method.

**Pros and Cons:**

* **Spread Operator (`...`):**
	+ Pros:
		- More concise and readable code
		- Less memory overhead, as it doesn't create a new array
	+ Cons:
		- May have performance issues due to the complexity of the merge logic
		- Not supported in older browsers or environments
* **Concatenation using `concat()`**:
	+ Pros:
		- Widely supported across browsers and environments
		- Easy to understand and implement
	+ Cons:
		- More verbose code
		- Creates a new array, which can lead to increased memory overhead

**Benchmark Results:**
The benchmark results show the performance of each option on different browsers and devices. The `Push true` test uses concatenation with `push`, while the other tests use the spread operator.

In this specific benchmark, the Chrome 100 browser on Windows Desktop shows:

* **Spread Operator (`...`):** 3833343.25 executions per second
* **Concatenation using `concat()`**: 4594602.5 executions per second
* **Push true:** 6544135.5 executions per second

Overall, the results suggest that concatenation with `push` is the fastest way to add properties to an object in this specific benchmark.

**Conclusion:**
While the spread operator (`...`) has its advantages, the benchmark suggests that concatenation using `concat()` might still be the better choice for performance-critical code in certain scenarios. However, it's essential to note that browser and environment support can vary greatly, so it's crucial to test your specific use case before making a decision.

Related benchmarks:

spread operator vs push test5 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: spread operator true vs spread operator false vs Push true vs push false

Created: 4 years ago by: Guest

Jump to the latest result

spread operator true

spread operator false

Push true

push false

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):