Hello good people of Fedora!
Most of you is probably facing very slow java (java-1.8.0-openjdk) on any arm32 device. The luckier from you already tuned arm32 boards to not need java at all.
But behold! The "new"[0] OpenJDK for arm32 crossed milestone when it can be widely used.
If you need java on your arm32 board, try to replace (or install alongside) your java-1.8.0-openjdk special package java-1.8.0-openjdk-aarch32 The theoretical speedup[1] is aprox 100x faster. Practical speedup is somewhere between 10x-50x (for now). You can see it in koji: http://koji.fedoraproject.org/koji/buildinfo?buildID=780150 - java build by "normal" java on aarch32 - 13 hours http://koji.fedoraproject.org/koji/buildinfo?buildID=802986 - java build by "new" java on aarch32 - 2 hours
We have already slowly started to enable virtual java provides: f24 - no f25 - java f26 - java+java-devel
Please *don't* change your specfiles (if any) to something like:
ifarch arm32 BuildRequires java-1.8.0-openjdk-aarch32-devel else BuildRequires java-1.8.0-openjdk-devel fi
You will mess up things a lot. The provides will come with stability and in longer run the package will be merged back to java-1.8.0-openjdk packages (as it is still the same friendly openjdk, just with different virtual machine)
hth J.
[0] http://koji.fedoraproject.org/koji/packageinfo?packageID=22627 [1] http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-September/00044...