Let's break down the benchmark and explain what's being tested, compared, and their pros and cons.

Benchmark Overview

The benchmark compares three methods to create a deep copy of an object: _.cloneDeep from Lodash, structuredClone (a native JavaScript method introduced in ES2022), and JSON.parse(JSON.stringify(MyObject)).

Test Cases

1. Lodash cloneDeep: This test uses the _.cloneDeep function from Lodash to create a deep copy of the MyObject. _ is an alias for the Lodash library, which provides utility functions for functional programming.
2. Native structuredClone: This test uses the structuredClone method (introduced in ES2022) to create a deep copy of the MyObject.
3. JSON String parse: This test uses the JSON.parse(JSON.stringify(MyObject)) syntax to create a deep copy of the MyObject. Note that this method does not support cyclic references, which can lead to incorrect results.

Comparison

The benchmark compares the performance of these three methods across different browsers and execution rates. The results show that:

• Lodash's _.cloneDeep is generally faster than the native structuredClone method.
• The JSON String parse method is slower and less reliable, especially with large input sizes.

Pros and Cons

1. Lodash cloneDeep: Pros:
   • Highly optimized and performant.
   • Supports cyclic references out of the box. Cons:
   • Requires Lodash library inclusion.
2. Native structuredClone: Pros:
   • Native implementation, no additional library required.
   • Supports cyclic references. Cons:
   • Limited support in older browsers (pre-ES2022).
3. JSON String parse: Pros: None significant.

Other Considerations

• The structuredClone method is designed to work with structured data formats like JSON and XML. It's optimized for performance and safety, but might not be suitable for all use cases.
• Lodash's _.cloneDeep is a well-maintained and widely adopted solution, but it may have performance overhead due to its complexity.

Alternatives

If you don't want to use Lodash or rely on the native structuredClone method, you can consider:

1. lodash-es: A lightweight version of Lodash that's compatible with modern browsers.
2. JSON.parse(JSON.stringify()) + cyclic references workarounds: If you need to support older browsers, you might consider implementing a workaround for cyclic references using techniques like JSON string manipulation or caching.

Keep in mind that these alternatives may introduce additional complexity and performance overhead.

I hope this explanation helps!