Benchmark: Compare lodash isEmpty and length comparison on arrays

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

// empty array
window.foo1 = [];

// array of strings
window.foo2 = ['a', 'b', 'c', 'd', 'e'];

// array of objects
window.foo3 = [{ a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }, { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }];

Tests:

isEmpty empty array
_.isEmpty(window.foo1);
length empty array
window.foo1.length === 0;
isEmpty array of strings
_.isEmpty(window.foo2);
length array of strings
window.foo2.length === 0;
isEmpty array of objects
_.isEmpty(window.foo3);
length array of objects
window.foo3.length === 0;

Historical Performance Data aggregated from 65 community runs

Desktop Results:

Chrome 56 runs

length array of strings

13.4M/s

length empty array

13.3M/s

length array of objects

13.3M/s

isEmpty array of objects

6.1M/s

isEmpty empty array

6.1M/s

isEmpty array of strings

6.0M/s

Fastest: length array of strings (2.2x faster)

View exact numbers

✓ length array of strings: 13,394,050 ops/sec
• length empty array: 13,346,432 ops/sec
• length array of objects: 13,277,670 ops/sec
• isEmpty array of objects: 6,071,673 ops/sec
• isEmpty empty array: 6,068,994 ops/sec
• isEmpty array of strings: 6,048,036 ops/sec

Firefox 9 runs

length array of strings

13.9M/s

length array of objects

13.9M/s

length empty array

13.7M/s

isEmpty array of objects

10.0M/s

isEmpty array of strings

9.8M/s

isEmpty empty array

9.7M/s

Fastest: length array of strings (1.4x faster)

View exact numbers

✓ length array of strings: 13,922,714 ops/sec
• length array of objects: 13,915,781 ops/sec
• length empty array: 13,655,184 ops/sec
• isEmpty array of objects: 10,034,676 ops/sec
• isEmpty array of strings: 9,794,017 ops/sec
• isEmpty empty array: 9,708,181 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
isEmpty empty array
length empty array
isEmpty array of strings
length array of strings
isEmpty array of objects
length array of objects

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser/OS: Chrome 141 on Mac OS X 10.15.7

View result in a separate tab

length empty array

94.9M/s

length array of objects

92.3M/s

length array of strings

91.7M/s

isEmpty array of objects

21.1M/s

isEmpty empty array

21.1M/s

isEmpty array of strings

21.0M/s

View exact numbers

Test name	Executions per second
✓ length empty array	94,855,456 Ops/sec
length array of objects	92,250,984 Ops/sec
length array of strings	91,710,008 Ops/sec
isEmpty array of objects	21,141,196 Ops/sec
isEmpty empty array	21,140,068 Ops/sec
isEmpty array of strings	21,024,036 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the benchmark and explain what's being tested, the pros and cons of each approach, and other considerations.

**Benchmark Definition**

The benchmark is designed to compare two approaches:

1. **_.isEmpty(window.foo1);**
2. **window.foo1.length === 0;**

Both methods are used to check if an empty array `window.foo1` has zero elements.

**Lodash Library**

The Lodash library, specifically the `_.isEmpty()` function, is used in two test cases:

* "isEmpty empty array"
* "isEmpty array of objects"

_._isEmpty() is a utility function that checks if a value is empty. It returns a boolean indicating whether the value is empty or not.

**Native JavaScript**

The native JavaScript `length` property and comparison operator (`===`) are used in three test cases:

* "length empty array"
* "length array of strings"
* "length array of objects"

In these cases, we're checking if the length of an array is zero using the `length` property and the `===` operator.

**Approach Comparison**

Here's a brief summary of each approach:

1. **Lodash `_._isEmpty()`**: This method uses Lodash's internal logic to check for emptiness, which might be more efficient than native JavaScript methods in some cases.
	* Pros: Might be more efficient due to optimized implementation.
	* Cons: Requires including the Lodash library, which may introduce an additional dependency.
2. **Native JavaScript `length` property**: This method uses the built-in `length` property and comparison operator (`===`) to check for emptiness.
	* Pros: No dependencies, widely supported across browsers.
	* Cons: Might be slower or less efficient than Lodash's implementation due to native code overhead.

**Other Considerations**

* **Type coercion**: In some cases (e.g., checking if an empty array has zero elements), JavaScript may perform type coercion, which can affect performance. Lodash's `_._isEmpty()` function might mitigate this issue.
* **Browser support**: While the `length` property and comparison operator are widely supported across browsers, Lodash's implementation may have additional dependencies or requirements (e.g., polyfills) for certain browsers.

**Alternatives**

If you're looking for alternative approaches, consider:

1. **Using a different library**: Other utility libraries like Moment.js, jQuery, or native implementations like `Array.prototype.every()` could be explored.
2. **Writing a custom implementation**: You can write your own implementation using JavaScript's built-in types and operators to check for emptiness.
3. **Using a framework-specific solution**: Some frameworks (e.g., React) provide optimized implementations for checking array emptiness.

Keep in mind that the choice of approach depends on your specific use case, performance requirements, and dependencies.

Compare lodash isEmpty and length comparison on arrays (version: 0)

Comparing performance of: `isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings vs isEmpty array of objects vs length array of objects`

Created: 7 years ago by: Guest

Go to the latest result

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

isEmpty array of objects

length array of objects

Historical Performance Data aggregated from 65 community runs

Desktop Results:

Chrome 56 runs

Firefox 9 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Compare lodash isEmpty and length comparison on arrays (version: 0)

Comparing performance of: isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings vs isEmpty array of objects vs length array of objects

Created: 7 years ago by: Guest

Go to the latest result

isEmpty empty array

length empty array

isEmpty array of strings

length array of strings

isEmpty array of objects

length array of objects

Historical Performance Data aggregated from 65 community runs

Desktop Results:

Chrome 56 runs

Firefox 9 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `isEmpty empty array vs length empty array vs isEmpty array of strings vs length array of strings vs isEmpty array of objects vs length array of objects`