Overview
The article discusses Glimmer, a new rendering engine for Ember.js, designed to improve performance by reducing payload size, CPU time, and memory pressure. It highlights the evolution of the rendering engine, its architectural decisions, and the benefits realized from its implementation.
What You'll Learn
1
How to optimize rendering performance in Ember.js applications using Glimmer
2
Why using a JSON wire format improves network performance and runtime efficiency
3
When to leverage Ahead-of-Time (AoT) compilation for better application load times
Prerequisites & Requirements
- Understanding of Ember.js and its rendering architecture
- Familiarity with TypeScript and Handlebars(optional)
Key Questions Answered
What are the main advantages of using the wire format in Glimmer?
The wire format allows for lazy parsing at runtime, facilitates moving parts of the runtime off the main thread, and enables adaptive runtime optimizations. This results in improved performance and reduced payload sizes, enhancing the overall user experience.
How does Glimmer improve the performance of Ember.js applications?
Glimmer reduces the compiled template size by about 40% compared to Glimmer1, leading to improved network performance. Additionally, it allows for smaller parse and eval times at runtime, resulting in a 10-15% improvement in Real User Metrics (RUM) for initial load times.
What architectural changes were made in Glimmer compared to Glimmer1?
Glimmer was rewritten to incorporate lessons learned from previous iterations, making components first-class primitives, using a pull-based system for updates, and implementing a virtual machine architecture for optimization. These changes significantly enhance rendering performance.
Key Statistics & Figures
Reduction in compiled template size
40%
Compared to Glimmer1, leading to better network performance.
Improvement in Real User Metrics (RUM)
10-15%
For the initial load of the web app after implementing Glimmer.
Technologies & Tools
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Frontend
Ember.js
Framework used for building client-side web applications.
Programming Language
Typescript
Used for writing Glimmer to enhance maintainability and enforce object shape.
Templating Language
Handlebars
Used for templating in Glimmer.
Key Actionable Insights
1Implementing Glimmer in your Ember.js applications can lead to substantial performance improvements, particularly in load times and responsiveness.By adopting Glimmer, developers can leverage its optimized rendering engine to enhance user experience, especially in applications with heavy UI interactions.
2Utilizing Ahead-of-Time (AoT) compilation can drastically reduce the size of the code sent to users, improving load speed.This technique is particularly beneficial for applications that require fast initial rendering, as it minimizes the amount of JavaScript that needs to be parsed and executed in the browser.
Common Pitfalls
1
Neglecting the importance of payload size and execution time can lead to performance bottlenecks in web applications.
Developers should be aware that users are often network-bound and CPU-bound, making it crucial to optimize these aspects for a smooth user experience.
Related Concepts
Performance Optimization Techniques In Web Applications
Advanced Rendering Strategies In Javascript Frameworks
The Role Of Typescript In Modern Web Development