Since snapshot 13w23a is not possible to play it online for longer period anymore. The mincraft server is being closed automatically because of excessive CPU usage. Even with one player idling the server uses 100% CPU (virtual server with hard CPU limit)
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Hi, testing on full CPU does not make sense. The issue appears on small virtual server with hard CPU limits, so it is probably 100 times less powerful than yours. In this case the usage jump is noticable compared to 22a.
You might have told this little fact about virtual server in the description of the ticket right from the start, that would've saved me 1/2 h testing time...
It was there in Environment section, I doubt anyone rents full quad core just to play minecraft 🙂
Cannot confirm with Win7-64 / Java 7U21 / Quadcore, see screenshots.