rendering by Ogre

[CrystalH]

Thank for help NaN.
I've added this in code, didn't change much.
I had 12ms with very many trees.

On my test track in jungle I have 3696 collision shapes added for vegetation. It shows around 6 ms.
Should there be one btCollisionObject for each tree (like it is now) or should they be somehow grouped ?
And the profiled log outputs this:

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Profiling: Root (total running time: 4.650 ms) ---

0 -- stepSimulation (99.96 %) :: 4.648 ms / frame (1 calls)

Unaccounted: (0.043 %) :: 0.002 ms
...
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...
Profiling: stepSimulation (total running time: 4.648 ms) ---
...
0 -- synchronizeMotionStates (0.04 %) :: 0.002 ms / frame (2 calls)
...
1 -- internalSingleStepSimulation (98.49 %) :: 4.578 ms / frame (2 calls)
...
Unaccounted: (1.463 %) :: 0.068 ms
......
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......
Profiling: internalSingleStepSimulation (total running time: 4.578 ms) ---
......
0 -- updateActivationState (0.00 %) :: 0.000 ms / frame (2 calls)
......
1 -- updateActions (22.80 %) :: 1.044 ms / frame (2 calls)
......
2 -- integrateTransforms (0.09 %) :: 0.004 ms / frame (2 calls)
......
3 -- solveConstraints (6.49 %) :: 0.297 ms / frame (2 calls)
......
4 -- calculateSimulationIslands (3.25 %) :: 0.149 ms / frame (2 calls)
......
5 -- performDiscreteCollisionDetection (67.06 %) :: 3.070 ms / frame (2 calls)
......
6 -- predictUnconstraintMotion (0.13 %) :: 0.006 ms / frame (2 calls)
......
Unaccounted: (0.175 %) :: 0.008 ms
.........
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.........
Profiling: solveConstraints (total running time: 0.297 ms) ---
.........
0 -- solveGroup (1.68 %) :: 0.005 ms / frame (2 calls)
.........
1 -- processIslands (35.69 %) :: 0.106 ms / frame (2 calls)
.........
2 -- islandUnionFindAndQuickSort (59.26 %) :: 0.176 ms / frame (2 calls)
.........
Unaccounted: (3.367 %) :: 0.010 ms
............
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............
Profiling: solveGroup (total running time: 0.005 ms) ---
............
0 -- solveGroupCacheFriendlyIterations (40.00 %) :: 0.002 ms / frame (2 calls)
............
1 -- solveGroupCacheFriendlySetup (40.00 %) :: 0.002 ms / frame (2 calls)
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Unaccounted: (20.000 %) :: 0.001 ms
.........
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.........
Profiling: performDiscreteCollisionDetection (total running time: 3.070 ms) ---
.........
0 -- dispatchAllCollisionPairs (19.64 %) :: 0.603 ms / frame (2 calls)
.........
1 -- calculateOverlappingPairs (0.07 %) :: 0.002 ms / frame (2 calls)
.........
2 -- updateAabbs (80.23 %) :: 2.463 ms / frame (2 calls)
.........
Unaccounted: (0.065 %) :: 0.002 ms

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