Re: Measuring effect of using GWT features on compile time

FWIW, as far as I can tell, the DashboardNotifier is *only* notified when dev mode starts and stops via com.google.gwt.dev.util.log.dashboard.DashboardNotifier#devModeSessionBegin and com.google.gwt.dev.util.log.dashboard.DashboardNotifier#devModeSessionEnd. I can't find anywhere in the GWT code base that uses the devModeEventBegin/End methods.

I wound up just digging through the DEBUG output to get the answer I needed. For that I am appreciative of the pointer. It was not as hard as I was expecting since I could easily search for the lines I needed to find.

Thank you.

jay

On Wednesday, June 8, 2016 at 3:05:23 AM UTC-7, Thomas Broyer wrote:

On Wednesday, June 8, 2016 at 1:50:03 AM UTC+2, jgindin wrote:

I'm looking for some way to see how much of my GWT compile time is coming from our usage of different features. Specifically:

• UiBinder
• RPC
• Guice (not core GWT, I know...but maybe there's a way to see this too)

For RPCs in particular, I've tried to dig around and see if there are any "hidden" flags, but have come up empty handed so far.

Does anyone know of some way to find this information? (I'm using GWT 2.7...)

You'll get timing information for each generator invocation when you set the log level to DEBUG, but it won't be easy to parse.

But there are hidden flags (as system properties) to enable performance logging; e.g. -Dgwt.speedtracerlog=/path/to/file.html (but this requires the SpeedTracer extension for Chrome, which is no longer maintained –probably no longer works– and has been removed from the Chrome Web Store), or -Dgwt.dashboard.notifierClass=xxx (where xxx is the name of a class implementing com.google.gwt.dev.util.log.dashboard.DashboardNotifier). That last one is what (I believe) Google is currently using internally. You'll get specialized events for UiBinder, RPC and GIN (and I18N), and a generic event for other generators. (you'll find -Dgwt.perflog and -Dgwt.perfcounters but I don't think they produce anything nowadays)

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