Performance of Javac on large workspaces

[gayanper]

I know this is too early to test and measure with javac implementation. But anyway I just wanted to see how it goes.

I was trying to load the https://github.com/Azure/azure-sdk-for-java in VSCode for debugging an issue. When I try to load this project with JDT it takes around ~ 10min or less with project 2K errors. When I try to load the same with Javac it takes around more than 15min with 10k project errors.

I think project errors are due to something I'm missing to do prior to importing. But the time it takes to run the import has a huge difference and also the responsiveness of VSCode.

Also in JDT mode regardless I had 2K errors, I could run some of unit tests and work with the code base. But in Javac mode the same tests cannot be executed since the java-debug fails to find the compiled classes. Seems like the compiled classes are missing on the disc even though I see there are not errors in the test class.

I think we can take this up when are in good position with feature implementation in Javac branch compared to JDT. Then we can look at improving the the times.