I didn't submit a bug-report for this issue yet, because this is most likely going to take me quite a while to create a simple reproduction case for it and I'm short on time. Therefore I'd like to know if Unity Technologies is aware of this issue, so I don't have to spend time on building a bug-report. I see a performance regression in UGUI.Rendering.UpdateBatches in Unity 2017.2 beta, compared to Unity 2017.1. UGUI.Rendering.UpdateBatches performs significantly slower in 2017.2 than in 2017.1 in my game. This is a performance degradation from 0.06 ms to 1 ms for me. 1 ms is a big deal if you have to target 90 or 60 fps. Here are two profiler screenshots taken in a Windows Standalone 64bit build with Unity 2017.1 and 2017.2. See the highlighted/selected row. Spoiler: Unity 2017.1.1p2 (performance ok) Spoiler: Unity 2017.2.0f1 (performance issue) Side note: Notice that the whole game is also about 2 ms slower in 2017.2.0f1 by average, see "CPU". This even uses the new Physics optimizations (autoSyncTransforms=false in 2017.2). 2 ms is almost 20% of a frame if you target 90fps/VR, or 10% if you target 60fps, it's a huge deal.