Global Assembly Cache in Browser for Blazor WASM

[jatinshah404]

When we user try opening a Blazor app in browser , system downloads all .NET framework related DLLs first time. Can we have GAC like feature in browser? where all .NET framework related dlls are already stored and Blazor app can use them without downloading dlls? Is that possible using Edge browser? That way initial load time of Blazor client app will significantly reduced.

[maraf]

Framework dlls are trimmed to what the actual application is using. Downloading them is one part, but them into the wasm memory is second. Having to load more assemblies / bigger assemblies would increase that part. That's one of the reasons why even general CDN isn't a good option for .NET in the browser.

.NET nowadays ships different, you have STS and LTS (and possibly previews) and servicing releases for each. That would mean a browser installer would be probably hundreds of mega bytes. Should browser vendors force that on any user that possibly may never visit a blazor based site? Should they do that for other frameworks as well?

[jatinshah404]

I am sure User will definitely visit a Blazor site in life time. But right now if you open two Blazor websites in browser, it downloads 2 copy of Framework dlls in browser cache storage. Isn't is better to keep 1 master copy of framework dlls rather than downloading separate copy for each website? For example I have enterprise grade blazor app and it is being used by thousands of employees on daily based, they would not mind to install a Browser patch of full framework dlls once and if that happens, all other blazor based websites (means developed by other vendors) will also use same copy of Framwork dlls rather than re-downloading separate copy for each time.

[danroth27]

Hi @jatinshah404. Unfortunately, modern browsers no longer allow caching content across multiple domains due to privacy concerns: https://developer.chrome.com/blog/http-cache-partitioning.

[FLAMESpl]

I guess most sites opt in for linker trimming, so every blazor app can have different content of framework dlls.