JS source code is compiled to native code with the tool
nwjc , which is provided in the SDK build.
To use it:
nwjc source.js binary.bin
*.bin file is needed to be distributed with your application. You can name it whatever you want.
The arguments of the win.evalNWBin() method are similar with the
Window.eval()method, where the first parameter is the target iframe (
nullfor main frame), and the 2nd parameter is the binary code file.
The compiled code is executed in Browser Context. You can use any Web APIs (such as DOM) and access NW.js API and Node API like other scripts running in browser context.
The compiled code runs slower than normal JS: ~30% performance according to v8bench. Other non-compiled JS source code will not be affected.
The compiled code is not cross-platform nor compatible between versions of NW.js. So you’ll need to run
nwjc for each of the platforms when you package your application.