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How to improve RCP applications startup time? [message #1750367]

Tue, 20 December 2016 07:43

Eclipse User

Migrating our RCP application from eclipse 3.7 to e4 resulted in significant startup time degradation.
It went from 3 seconds on eclipse 3.7 up to 17 seconds on latest 4.6.1 target platform.

Two visible bottle necks are the activation of org.eclipse.e4.ui.css.swt.theme and org.eclipse.help bundles.

I was wandering if there is anything we can do to improve this?
I don't use any themes and don't need any support for help system.
Unfortunately it's not possible to remove them from dependencies.
But is there any way to at least lazy load, postpone, fake, ignore, etc.. their activation?

Re: How to improve RCP applications startup time? [message #1750381 is a reply to message #1750367]

Tue, 20 December 2016 09:36

Eclipse User

You can disable theming via Preferences -> General -> Appearance

Eclipse doesn't look that shiny then, but honestly I know of several people that prefer the non themed Eclipse over the styled one because of performance improvements.

Re: How to improve RCP applications startup time? [message #1750399 is a reply to message #1750381]

Tue, 20 December 2016 12:11

Eclipse User

Thank you, Dirk
Do you know how can I do this programmatically?
I don't want to expose this to end users.
I want to put some configuration parameter somewhere so that it boots up without any theming..

Re: How to improve RCP applications startup time? [message #1750409 is a reply to message #1750399]

Tue, 20 December 2016 14:35

Eclipse User

Quote:

Add "-cssTheme none" runtime option to the Eclipse command line

http://www.jroller.com/andyl/entry/boost_eclipse_performance

Re: How to improve RCP applications startup time? [message #1750413 is a reply to message #1750409]

Tue, 20 December 2016 15:37

Eclipse User

"-cssTheme none" didn't have any affect as far as I can tell.

I have enabled tracing for bundle loading times.
During the startup my app hangs for about 10 seconds doing this two unnecessary things:

Finding activator for org.eclipse.e4.ui.css.swt.theme_0.10.100.v20160523-0836 [832]
Finding activator for org.eclipse.help_3.7.0.v20160602-1307 [915]

I wonder what is it trying to do for so long..

Re: How to improve RCP applications startup time? [message #1750422 is a reply to message #1750413]

Tue, 20 December 2016 16:44

Eclipse User

If you don't use these bundles, why do you add them to your product? Probably because you use the default Eclipse RCP feature?

Re: How to improve RCP applications startup time? [message #1750492 is a reply to message #1750422]

Wed, 21 December 2016 11:37

Eclipse User

I wish I could remove them.., migration from 3.7 to 4.x almost doubled the size of the product with completely irrelevant things.
Help and CSS bundles are deep dependencies, for example org.eclipse.ui depends on Help bundle and I can't remove it.
What do you mean by "default Eclipse RCP feature" ?
I use among others

org.eclipse.rcp 
org.eclipse.e4.rcp

(and by the way the Eclipse itself with disabled theming tries to activate org.eclipse.e4.ui.css.swt.theme and spends on this couple of seconds, I see it on the splash screen progress)

Re: How to improve RCP applications startup time? [message #1750495 is a reply to message #1750492]

Wed, 21 December 2016 12:41

Eclipse User

Did you try neon 2? IIRC there was some proxy network issue

Re: How to improve RCP applications startup time? [message #1750497 is a reply to message #1750495]

Wed, 21 December 2016 13:26

Eclipse User

I don't think 4.6.2 update works, was it released?
This is what I get trying to go from 4.6.1 forward:

Cannot complete the install because one or more required items could not be found.
  Software being installed: Eclipse for RCP and RAP Developers 4.6.2.20161208-0625 (epp.package.rcp 4.6.2.20161208-0625)
  Missing requirement: Eclipse for RCP and RAP Developers 4.6.2.20161208-0625 (epp.package.rcp 4.6.2.20161208-0625) requires 'org.eclipse.jdt.feature.group [3.12.2.v20161124-1400]' but it could not be found

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