JSX HACKING GUIDE

Bootstrap

JSX compiler is self-hosted. tool/bootstrap-compiler.js is the bootstrap compiler, which is a version of pre-compiled JSX compiler.

To update the bootstrap compiler, type make bootstrap-compiler.

JSX has a compilation server, or persistent compilation daemon, to accelerate compilation.

bin/jsx - a wrapper script which runs compilation server automatically and requests compilation to the server
bin/jsx-compiler.js - the entity of JSX compiler

t/util/test-runner dispatches test according to the test directory.

t/run/*.jsx are JSX language specification to test how JSX works
t/compile_error/*.jsx are also specification to test what should be errors
t/complete/*.jsx tests --mode complete
t/web/*.jsx are web stuff tested with phantomjs
t/lib/*.jsx and t/src/*.jsx are libraries and JSX sources tested with test-case.jsx

NodeJS can profile applications with V8Profiler.

Run JSX compiler with node --prof e.g. node --prof bin/jsx-compiler.js example/hello.jsx > /dev/null
Parse v8.log with node-tick-processor e.g. node-tick-processor > prof.txt
Look into the result.