Merge pull request #8 from lukego/readme3

Revised README.md

README.md

@@ -5,12 +5,25 @@
 RaptorJIT is an experimental fork of LuaJIT. Premise: What would I do
 if I were only trying to please myself and nobody else?
 
-Welcome to propose radical changes! (Shock me! :-))
+Initial changes (ongoing work):
 
-Check out the
-[RaptorJIT performance regression tests](https://hydra.snabb.co/job/luajit/branchmarks/benchmarkResults/latest/download/2) 
-that automatically check for performance differences with other LuaJIT
-forks/branches/versions.
+- Support only Linux/x86-64 with `+JIT +FFI +GC64` and `-GDBJIT
+  -PERFTOOLS -VMEVENT -PROFILE` and otherwise canonical settings.
+  Remove the ~50,000 lines of code for other architectures, operating
+  systems, and features.
+- Remove features that are not the right thing for my use cases:
+  built-in disassemblers, `jit.v`, `jit.p`, `jit.dump`, and the VM
+  features required to support them. These need to be replaced with
+  simple and low-overhead mechanisms that provide data to be analyzed
+  be external tools. (Tools will be developed in
+  the [Studio](https://github.com/studio) project.)
+- Continuous Integration testing
+  with [Travis-CI](https://travis-ci.org/raptorjit/raptorjit) and
+  with [automatic performance regression tests](https://github.com/lukego/LuaJIT-branch-tests).
+
+Goal is to strip the code down to the minimum that is needed for
+writing high-performance soft-realtime server applications for
+Linux/x86-64. PRs with radical code reductions welcome! :-)
 
 -- Luke Gorrie @lukego