eclipseeclipse-juno
How can I upgrade Eclipse from Indigo to Juno without losing all of my customizations?
I've tried two different things, neither of which worked:
It's so annoying to have to start from scratch with every upgrade…
The three most influential factors for Eclipse speed are:
The "same" workspace in Indigo (3.7.2) SR2 loads in 4 seconds, in Kepler SR2 (4.3.2) in 7 seconds and in Luna (4.4.0) in 10 seconds. All are Java EE bundles. Newer versions have more bundled plugins, but still the trend is obvious. (by "same" workspace I mean: same (additionally installed) plugins used, same projects checked out from version control).
Launching it with the latest JDK (Java 14 at the time of writing, which does not prevent you to compile in your Eclipse project with any other JDK you want: 1.4.2, 1.5, 1.6 older...)
-vm jdk1.6.0_10\jre\bin\client\jvm.dll
Configuring the eclipse.ini (see this question for a complete eclipse.ini)
-Xms512m
-Xmx4096m
[...]
The Xmx argument is the amount of memory Eclipse will get (in simple terms). With -Xmx4g, it gets 4 GB of RAM, etc.
Note:
Dec. 2020, Udo conforms in the comments
From version 4.8 (Photon) an up there was a steady speed gain after each version.
The main platform was optimized every release to load faster, enable more features for the dark theme and to add more features for newer Java versions for the Java development tools.
Especially with-in the last 3 versions the startup time was increased a lot. There should be a significant increase in start-up time with the newest version of Eclipse 2020-12.In my experience it started a lot faster with each new version.
But: There are still plug-ins which do not follow the new way of using the Eclipse API and are therefore still slow to start.
Since the change to Java 11 as the minimum runtime version starting from Eclipse version 2020-09 at least the core system uses the newer features of the JVM. It is up to the providers of the other plug-ins to upgrade to newer APIs and to use the full power of modern CPUs (e.g. concurrent programming model).
Window → Preferences → General → Editors → Text Editors → Show line numbers.
Edit: I wrote this long ago but as @ArtOfWarfar and @voidstate mentioned you can now simply:
Right click the gutter and select "Show Line Numbers":
Best Answer
I am no expert, but I just added new sites to my "Available Software Sites" (help -> install new software -> Available Software Sites)
http://download.eclipse.org/releases/junohttp://download.eclipse.org/tools/cdt/releases/junoand updated (help -> install updates).
After the update
http://download.eclipse.org/eclipse/updates/4.2had been addedhttp://download.eclipse.org/eclipse/updates/3.7had been disabledhttp://download.eclipse.org/tools/cdt/releases/indigohad been disabledmaybe other changes that I didn't notice.
Everything seems to work as expected - project list remains - perspectives remain - the only thing that wasn't preserved seemed to be the editor tabs that were open in the workspace, but that is small loss. So hopefully that was the right way to do it - unless someone wants to tell me differently.
Alan