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Rails ships with support for using Memcached as the cache storage. Memcached is an open source, key value store that is designed primarily for caching. Out of the box it is configured to automatically expire old cache keys and can easily be scaled up with
C extensions are a powerful tool to connect Ruby code with C libraries that can perform much faster than a pure Ruby counterpart.
One fantastic way to improve Rails performance is by using Etags to help the browser keep track if a page has changed or not. This can help Rails skip rendering views entirely and save lots of time.
A CDN can distribute assets globally and allow more parallel downloads. This equates to performance benefits for users anywhere in the world
Learn how Bootsnap speeds up your Ruby and Rails app boot times by preloading the load paths and caching Ruby bytecode
Add advanced counter caching for soft deletable models, scopes, and has_many relationships
Learn how to use counter caches in your Rails app
Speed up the Rails asset pipeline in development by organizing your assets correctly
Learn how to improve the speed of your database queries by adding database indexes to your tables
Learn how to implement efficient Russian Doll Caching with Rails 5
Learn how I design GoRails for speed and performance on all layers of the stack
Learn how I discovered and solved a performance bug in OneMonth.com's view partial
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