gzclient slow to load with many models due to shaders

[osrf-migration]

Original report (archived issue) by Steve Peters (Bitbucket: Steven Peters, GitHub: scpeters).

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There were several comments on drcsim issue 352 (here and here) that the drc_practice_task_2.world takes a long time to load in gzclient. I have confirm that gzserver can load the world relatively quickly, but that gzclient can take about 2 minutes to start. I ran valgrind --callgrind gzclient and found gazebo::rendering::RTShaderSystem::GenerateShaders to occupy 50% of the call time during startup (here's a screenshot of kcachegrind).

[osrf-migration]

Original comment by Ian Chen (Bitbucket: Ian Chen, GitHub: iche033).

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pull request #773

[osrf-migration]

Original comment by Ian Chen (Bitbucket: Ian Chen, GitHub: iche033).

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• changed state from "new" to "resolved"

[osrf-migration]

Original comment by Nate Koenig (Bitbucket: Nathan Koenig).

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• set version to "all"

[osrf-migration]

Original comment by Nate Koenig (Bitbucket: Nathan Koenig).

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• changed state from "resolved" to "closed"