Here are a couple of different ways to improve website performance using 3rd party services:
- Google PageSpeed Service
Page Speed Service New! is an online service to automatically speed up loading of your web pages. Page Speed Service fetches content from your servers, rewrites by applying web performance best practices and serves it to end users via Google’s servers across the globe.
This is a paid service - Amazon CloudFront CDN
Upload and deliver website components such as images, videos, audio, javascript, etc from Amazon’s cheap CDN
This is a pay-per-use service - Yotta Site Speed Optimizer
Similar to Google PageSpeed Service
This is a paid service - CloudFare
Free to paid