Benchmark Overview

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark involves creating an AngularJS application with two test cases: one using Angular's built-in ng directive and another using native HTML attributes (onclick) for the same functionality.

Script Preparation Code

The script preparation code defines an AngularJS module named "ent" with a single controller named "EntCtrl". The controller has a method called compileE that takes a JavaScript expression as input, compiles it using $compile, and executes it on a newly created scope. This allows the test to measure the performance of compiling and executing JavaScript code.

The script also sets up an AngularJS element with an ng-controller directive pointing to the "EntCtrl" controller.

Html Preparation Code

The HTML preparation code includes a reference to the AngularJS library (version 1.5.3).

Test Cases

There are two test cases:

1. ng: This test case uses Angular's built-in ng directive to compile and execute JavaScript code.
2. native: This test case uses native HTML attributes (onclick) for the same functionality.

Comparison of Options

The two options being compared are:

• Angular's ng directive vs. Native HTML attributes (onclick)
• Both approaches aim to achieve the same result: compiling and executing JavaScript code.
• The main difference lies in how this compilation and execution is achieved:
  • Angular's ng directive uses a proprietary compiler that takes care of parsing, compiling, and executing the JavaScript code.
  • Native HTML attributes (onclick) rely on the browser's built-in engine to execute the JavaScript code.

Pros and Cons

• Angular's ng: Pros:
  • Provides a standardized way of compiling and executing JavaScript code.
  • Can take advantage of Angular's optimizations and caching mechanisms.
  • Typically faster and more efficient than native approaches.
• Cons:
  • Requires AngularJS to be included in the HTML file, which can add overhead.
  • May not perform well for very small or simple expressions.
• Native HTML attributes: Pros:
  • Does not require any additional libraries or overhead.
  • Can potentially be faster for very small or simple expressions.
  • More straightforward to implement and debug.
• Cons:
  • May not provide the same level of optimization and caching as Angular's compiler.
  • Requires more manual effort to ensure correct parsing and execution of the JavaScript code.

Library: AngularJS

AngularJS is a JavaScript framework that provides a set of features and tools for building web applications. The ng directive used in this benchmark is part of AngularJS, which allows developers to create dynamic web pages with data-binding capabilities.

In this context, AngularJS is used to provide a standardized way of compiling and executing JavaScript code, making it easier to compare different approaches.

Special JS Feature/Syntax

There are no special JS features or syntax mentioned in the benchmark that require any specific knowledge or expertise. However, it's worth noting that AngularJS uses a proprietary compiler that may not be immediately familiar to developers who are not already familiar with the framework.

Other Alternatives

Other alternatives for compiling and executing JavaScript code include:

• Babel: A transpiler that can convert modern JavaScript code to older syntax that is supported by many browsers.
• Webpack: A module bundler that can compile and execute JavaScript code in a more efficient and optimized way.
• V8 JavaScript Engine: The engine used by Google Chrome and other browsers to execute JavaScript code.

These alternatives may offer different trade-offs in terms of performance, complexity, and ease of use, depending on the specific requirements of the application.