OSX -Editor running up to 100% CPU

With just some boxes geometry and the sky set to invisible, this eats 100 % CPU.
Not in play mode, just editing.
Is this expected behaviour?

(iMac, OSX Maverick)

Anyone in charge for this?

My system:
Model Name: iMac Model Identifier: iMac13,2 Processor Name: Intel Core i7 Processor Speed: 3.4 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 8 MB Memory: 24 GB NVIDIA GeForce GTX 675MX:
Chipset Model: NVIDIA GeForce GTX 675MX Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 1024 MB Vendor: NVIDIA (0x10de) Device ID: 0x11a2 Revision ID: 0x00a2 ROM Revision: 3707 Displays: iMac: Display Type: LCD Resolution: 2560 x 1440 Pixel Depth: 32-Bit Color (ARGB8888) Main Display: Yes Mirror: Off Online: Yes Built-In: Yes

XCode shows 100% usage or what? On my computer xcode also shows over 100% cpu usage but same time it shows over 600% as free, so in reality it uses only about 15-20% of my cpu capacity.

Talking about activity monitor. The main loop of the editor should not eat 100%, when doing just basics. Question is NOT related to XCode.

Activity Monitor can be a bit misleading. As juniperi mentioned, when it shows that a process is using 100%, it means a 100% of a single core. On your i7 CPU, which has (I suppose) 8 logical cores (you can check that in Activity Monitor’s Window->CPU Usage), the actual CPU usage is most likely about 13%.


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