Re: GWT 2.8.0-rc1 and closure compiler

IMO it was a bad idea to eliminate closure compiler from GWT, I've always used it and usually get 5-10% smaller output.

It's still possible to use, but "manually". I'm building with PRETTY option, then unzip war file, process all *.cache.js with closure compiler and put them back to war file.

Not sure it's stable though, still have no enough time to test it thoroughly.

On Thursday, August 4, 2016 at 9:33:54 AM UTC-7, Luis Fernando Planella Gonzalez wrote:

Em quinta-feira, 4 de agosto de 2016 12:03:04 UTC-3, Thomas Broyer escreveu:

On Thursday, August 4, 2016 at 2:21:29 PM UTC+2, Luis Fernando Planella Gonzalez wrote:

I've always used the closure compiler with past versions (even with 2.8.0-beta1, which we have used in production already).

Now, to my surprise, it is no longer supported in GWT 2.8.0-rc1, as there's no mention to it in the release notes (http://www.gwtproject.org/release-notes.html).

We may want to add a note about it; but that was an experimental feature and those tend to come and go as experiments prove their value or not.

See https://gwt.googlesource.com/gwt/+/162ccc9c9112a09bf9ea046da95760f5f1886b72%5E%21/ for the rationale.

Ok. In our project, we used to enable the closure compiler because the codebase is quite large, and closure compiler helped in reducing further the code size. I don't have the numbers at hand, but the full code size (including all split points) is about 2.8M, and closure compiler reduced some hundred kilobytes from it.

 

 

Now the compiler no longer supports the old closure compiler option, but has a new -X[no]closureFormattedOutput option.

It's not really new actually: https://gwt.googlesource.com/gwt/+/6fa611cf9ad7ffa077a7378a100a7ccbd95e3cb3%5E%21/

I have assumed it was new because it is not present as option in the gwt-maven-plugin (which is updated up to the beta1).

 

I'm guessing closure compiler is no longer integrated in GWT, but it still has the option to format for closure to a later (manual) usage of closure compiler.

I'm using the gwt-maven-plugin, which still uses beta1, but explicitly changing its dependencies to 2.8.0-rc1 for gwt-user, gwt-dev and gwt-codeserver artifacts, making it usable already for rc1.

I can't, however, pass the new option (I think there's no way to pass arbitrary compiler arguments with gwt-maven-plugin) until the maven plugin is updated.

What are the new instructions to keep using closure compiler?

There aren't (see comment about -XclosureFormattedOutput in the commit message that introduced it)

Do you really *need* it?

I was assuming that flag was needed in order to generate code that complies with the closure compiler limitations (https://developers.google.com/closure/compiler/docs/limitations).

Maybe that is not the case and I can just invoke the closure compiler manually on the generated GWT code? Should I expect any runtime problems by doing this?

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