Let's dive into the world of MeasureThat.net, where JavaScript microbenchmarks come to life!

Benchmark Overview

The provided JSON represents a benchmark test case that compares the performance of two approaches: using a numeric value (3) and a string representation of the same value ('3') in the hasOwnProperty method.

Options Being Compared

Two options are being compared:

1. Numeric Value: Using the literal numeric value 3 as the key in the object.
2. String Representation: Using the string '3' as the key in the object.

Pros and Cons of Each Approach

• Numeric Value:
  • Pros: Faster lookup times, as numeric values are typically stored as integers in JavaScript objects.
  • Cons: May not work correctly if the number is a non-integer value or has decimal points (due to type coercion).
• String Representation:
  • Pros: Can handle non-numeric values and string representations of numbers, making it more flexible.
  • Cons: Slower lookup times due to string comparison.

Library Used

None, as this benchmark is a basic JavaScript test case without any external libraries or dependencies.

Special JS Feature/Syntax

The hasOwnProperty method is a built-in JavaScript method that checks if an object has the specified property as its own property (i.e., not inherited from its prototype chain). It's a common and useful method in many JavaScript scenarios.

Benchmark Preparation Code Explanation

The script preparation code defines an object obj with several properties, including one with a numeric key (3) and another with a string representation of the same value ('3'). This object is used as the test subject for the benchmark.

Individual Test Cases

Each individual test case consists of two parts:

1. A Benchmark Definition: A JavaScript statement that uses either the numeric value or string representation of the key in the hasOwnProperty method.
2. A Test Name: The name assigned to each test case, which corresponds to the type of key used (numeric or string).

Latest Benchmark Result

The provided JSON result shows the benchmark execution data for two test cases:

1. Number: The Chrome 98 browser on a desktop with Mac OS X 10.15.7 achieved an executions per second rate of approximately 11,993,944.
2. String: The same browser and device platform achieved an executions per second rate of approximately 11,413,027.

These results suggest that using numeric values is faster than using string representations in the hasOwnProperty method.

Other Alternatives

If you're interested in exploring other benchmarking platforms or approaches, some alternatives include:

1. JSPerf: Another popular benchmarking platform for JavaScript.
2. Benchmarking libraries: Libraries like Benchmark.js or js-benchmark provide a structured way to create and compare benchmarks in your own projects.
3. Local testing frameworks: Frameworks like Jest or Mocha can be used to write and run benchmarks locally, allowing for more control over the testing environment.

I hope this explanation has been helpful in understanding the MeasureThat.net benchmark!