DotnetAsm

Ever had an argue with colleague about performance of a certain method? Then you have probably heard about https://sharplab.io/. While being excellent at compiling methods without tiered JIT, it has some drawbacks:

• PGO mode is not supported
• No possibility to use tiered compilation
• Method calls are represented as raw hex address instead of an actual method name
• It requires internet connection (yeah I know, in the current year you have internet almost everywhere)

There is a great extension for Visual Studio called Disasmo which inspired me for making this web-based extension that does not require Visual Studio.

Prerequisites

• .NET 7 RC1 SDK or higher

⚠️ Do not use external user input

Code that you write in the editor has no sandbox environment and is executed on your machine. Make sure you don't run anything that can corrupt your system!

How to use it

1. Run the DotnetAsm.Api.exe executable file
2. Open http://localhost:4040/ page in your browser
3. Write your method that you want to test
4. Call it inside the for loop right before the Thread.Sleep call
5. Type your method name inside the input on the top left corner of page
6. Click GENERATE ASM button

FAQ

Q: Why there is a for loop with Thread.Sleep inside?

A: In order to perform a so-called tiered compilation, method needs to be executed several times so it can hit a call counting threshold to be recompiled from Tier-0 to Tier-1. And total execution time needs to be delayed to see the results.