Hi, can someone confirm that 1.9 server use a massive amount of CPU usage (>70%) even on idle and with a new map? This is awful
No, we can't confirm this because 1.9 hasn't even been released, yet. Regarding the pre-releases, nobody really cares since it would be nothing but pure speculation if the 1.9 release will be a CPU hog or not.
Yes it does. It uses so much that some hosts won't allow the 1.9 pre-release to be used, since it consumes 100% of their CPU cores. Not sure if it is due to an XP orb spam issue or what, but I would not even use 1.9 if I was you.
I certainly noticed a much higher CPU usage with 1.9 prerelease 2. To help with that, make sure you're running Sun JDK 1.7. I was running OpenJDK and the lag was unbearable, with Sun Java it is much, much better. Good luck!