[webkit-dev] Deployment of new EWS Non-Unified builder

[Olmstead, Don]

I agree with everything Mark said in his reply I just wanted to add another benefit of having a non-unified build specifically to support build time optimization.

> > 2) In my contributions, I don’t just want to add missing includes, I want to remove unnecessary ones taking full advantage of forward declarations and moving code out of headers. Too many includes and too much dependency has a dramatic bad effect on the project, making colossal project build times even worse.

> I too try to do this when writing my patches.  I would argue that a non-unified EWS gives me greater confidence that a forward declaration is sufficient, and that I’m not just mistakenly thinking that it is only because some other file in the same unified unit also happen to include the header.  So, again, a non-unified EWS is helping here.
 
If we wanted to try any tooling around identifying when an include or forward declaration should be used we need a functioning non-unified build. We could try IWYU on the codebase, https://github.com/include-what-you-use/include-what-you-use , and see what happens.

There's also tools for analyzing where the build is spending its time. For Clang users the ClangBuildAnalyzer could be used, https://github.com/aras-p/ClangBuildAnalyzer . For Visual Studio a project that looks interesting is CompileScore, https://github.com/Viladoman/CompileScore .