screenly / playground

Performance Optimization

Goal: Enhance the performance of Edge Apps by implementing optimization techniques such as caching, minification, and compression.

Techniques:

  • Caching: Store frequently accessed resources (e.g., images, CSS, JavaScript) in a temporary location to reduce the need for repeated requests.

    • Example: Using the @screenly/edge-app-cache package for caching static assets.
      // Example from @screenly/edge-app-cache package
          const cache = require('@screenly/edge-app-cache');
          
          // ... other code
          
          app.use(cache({
            // Configure the cache directory
            cacheDir: './cache',
            // Specify the maximum age of cached files
            maxAge: 86400 // 24 hours
          }));
          
          // ... other code

  • Minification: Remove whitespace, comments, and other unnecessary characters from code to reduce file sizes.

    • Example: Using the uglify-js package for minifying JavaScript code.
      const uglify = require('uglify-js');
          
          // ... other code
          
          const result = uglify.minify(sourceCode);
          
          // ... other code

  • Compression: Compress files to reduce their transmission time.

    • Example: Using the gzip or brotli compression methods.
      const gzip = require('gzip');
          
          // ... other code
          
          const compressedData = gzip.gzipSync(sourceCode);
          
          // ... other code

Implementation:

  • Use a combination of these techniques to optimize Edge Apps for performance.
  • Consider the trade-offs between optimization techniques and maintainability.
  • Regularly evaluate and update the optimization strategies to ensure ongoing performance improvements.

References: