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VERY slow m2e build in Mars - 4.5.0 M6 [message #1692042]

Sun, 12 April 2015 18:02

Ryan Mising name

Messages: 8
Registered: July 2009

Junior Member

I have been using Mars and Luna on a set of m2e/wtp/egit/java8 projects (different workspace, but same project files on disk). When using Luna the incremental build is always fast and happens in the background (unnoticeable). The same incremental build in Mars takes 3+ minutes, causes a blocking dialog to appear with build status, and is very frustrating.

I turned on -debug for Mars and found the time is consumed in the MavenBuilder. While I haven't double checked it seems this only occurs on a project that has 6k resources. Although both Luna and Mars build output say they are processing 6k resources, the Luna build finishes in seconds.

What are the next steps for providing the information needed to solve the problem? How can I help?

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Re: VERY slow m2e build in Mars - 4.5.0 M6 [message #1692043 is a reply to message #1692042]

Sun, 12 April 2015 18:04

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Please report that to the m2e list!

Tom

On 12.04.15 20:02, Ryan Mising name wrote:
> I have been using Mars and Luna on a set of m2e/wtp/egit/java8 projects
> (different workspace, but same project files on disk). When using Luna
> the incremental build is always fast and happens in the background
> (unnoticeable). The same incremental build in Mars takes 3+ minutes,
> causes a blocking dialog to appear with build status, and is very
> frustrating.
> I turned on -debug for Mars and found the time is consumed in the
> MavenBuilder. While I haven't double checked it seems this only occurs
> on a project that has 6k resources. Although both Luna and Mars build
> output say they are processing 6k resources, the Luna build finishes in
> seconds.
> What are the next steps for providing the information needed to solve
> the problem? How can I help?

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Re: VERY slow m2e build in Mars - 4.5.0 M6 [message #1692132 is a reply to message #1692043]

Mon, 13 April 2015 18:18

Eclipse User

Be sure to try adding -XX:ReservedCodeCacheSize=512m to your VM args. I found one of my development workflows caused me to hit the code cache ceiling and, as Andrey documents in bug 459267, the JVM hotspot compiler essentially disables its code cache and turns into a sloth.

Brian.

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Re: VERY slow m2e build in Mars - 4.5.0 M6 [message #1692137 is a reply to message #1692132]

Mon, 13 April 2015 19:39

Ryan Mising name

Messages: 8
Registered: July 2009

Junior Member

Thanks for the suggestion. I gave it a shot but it didn't help. Code cache is hovering around 88mb.

I created a bug against m2e in case anyone cares to follow over there:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=464527

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