Game Jitters on xBox360?

It sounds like the garbage collector is causing your jitters. On Xbox it kicks in every time 1MB of data is allocated. The amount of time it takes depends on how many references are in use in your program.

Sounds like your rendering thread is just sat there waiting for the update thread to finish what its doing which causes the "jitter". Perhaps put in some code that logs how long a thread has to wait for before being allowed access to the other thread to find out if this really is the issue.

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