Using IMemoryCache to cache data in-memory using .NET 5 [An Introduction]

In this video, I am going to walk through how to cache data in-memory using the IMemoryCache interface in .NET 5.

Caching is a very useful mechanism to easily increase the performance of any application.

Previously I have covered topics on distributed cache services.

00:05 - Introduction of what is caching
02:45 - Explain the problem domain
03:34 - Create a new class for implementing cache using IMemoryCache
04:55 - Get an item from the cache using a key
05:50 - Add item to the cache
06:50 - Different overloads for adding cache
07:15 - Elaborate MemoryCacheEntryOptions object
07:35 - Explaining cache expiration and difference between sliding and absolute expiration policy
09:20 - Explanation of how to avoid stale data forever when using sliding expiration
10:15 - What is a post-eviction callback and how it can be useful
11:00 - Cache priority
11:15 - Size of the cache entry
11:50 - Mechanism I follow to add items to the cache using TryGetValue method
13:40 - Configuring dependency injection for IMemoryCache
14:05 - Explaining the overloads for AddMemoryCache extension method for adding IMemoryCache to the dependency injection
15:00 - explaining CompactionPercentage property
16:05 - Update the API to use the cache provider to get data
17:05 - Debug through the code and explain how the feature is working

[jmahachi]

I'm glad to have learnt something I didn't know existed. Thank you!

[nasserhossam]

Thanks for that clear explanation, I was looking for something like this to implement.

[TonyAlcast]

Excellent, pretty clear as most of your videos. Thanks for this hard work!

[manjunaika]

Was a very clean and clear explanation thank you for the video, keep up the good work 🤝

[PankajNikam]

If we mark IUserCache to singleton, we wont be able to use the EF Core DB Context (which usually is transient) inside UserCache class. How do you suggest we overcome this?

[vivekbarkam]

What is the difference between memory cache and response cache. Please explain....

[mathewjoseph]

does this work with Azure function. Or do we need to use Durable functions?

[dexterppp]

Lovely, your video is very helpful for me, I'm looking for a way how to cache data close to the application.
But my application is distributed application so I want to share data also then find out the way to send signals to each application for reloading cache.

[snkite]

Nicely done, but maybe the section at 16:20 could go a little slower. Thanks for the video.

[dnextreme]

You haven't mentioned that the NuGet package msut be installed first in order to use the IMemoryCache interface.