Benchmark Overview

The provided benchmark measures the performance of six different methods to check if a property exists in an object:

1. Object.prototype.hasOwnProperty.call(object, 'something' + test)
2. 'something' + test in object
3. array.indexOf('something' + test) !== -1
4. object['something' + test] === true
5. array.includes('something' + test)
6. set.has('something' + test)

Methods Compared

Here's a brief description of each method, their pros and cons, and other considerations:

1. Object.prototype.hasOwnProperty.call(object, 'something' + test)
   • Purpose: Check if a property exists in an object using the hasOwnProperty method.
   • Pros: Fast, reliable, and widely supported.
   • Cons: May have performance issues with large objects due to the overhead of the hasOwnProperty call.
2. ('something' + test) in object
   • Purpose: Use the in operator to check if a property exists in an object.
   • Pros: Fast, simple, and widely supported.
   • Cons: May be slower than other methods for very large objects due to the overhead of the in operator call.
3. array.indexOf('something' + test) !== -1
   • Purpose: Use the indexOf method to find an element in an array, then check if the result is not equal to -1 (indicating the absence of the element).
   • Pros: Fast and simple for arrays.
   • Cons: May be slower than other methods for large objects due to the overhead of the indexOf call.
4. object['something' + test] === true
   • Purpose: Use property access to check if a property exists in an object.
   • Pros: Fast and simple, but may have performance issues with very large objects.
   • Cons: May be slower than other methods for large objects due to the overhead of property access.
5. array.includes('something' + test)
   • Purpose: Use the includes method to check if an element exists in an array.
   • Pros: Fast and simple, but only available in modern browsers (ES11+).
   • Cons: May be slower than other methods for very large arrays due to the overhead of the includes call.
6. set.has('something' + test)
   • Purpose: Use a Set data structure to check if an element exists.
   • Pros: Fast and simple, especially for modern browsers (ES11+).
   • Cons: May be slower than other methods for very large Sets due to the overhead of hash operations.

Special Notes

• The Object.prototype.hasOwnProperty.call method is not strictly necessary in modern JavaScript versions, as hasOwnProperty is a built-in method on objects. However, it's still included here to test compatibility with older browsers.
• The array.includes and set.has methods are only available in modern browsers (ES11+). Their inclusion here tests compatibility with newer browsers.

Alternatives

If you need to support older browsers or specific use cases not covered by this benchmark, consider using:

• Object.prototype.hasOwnProperty.call
• ('something' + test) in object
• array.indexOf (with a custom implementation for the includes check)
• Custom property access methods
• Other specialized data structures, such as Map or WeakSet, which may be more suitable for specific use cases.