It seems that not only I have the feeling that the Mountain Lion is faster Lion. One of the reasons for this is the variety of enhancements and graphics drivers that will increase productivity OS X by about 8-10%. A set succeeded ArsTechnica editor Chris Foresmanu (Chris Foresman).
The performance of the operating system is influenced by many factors. For example, a quick drive, such as an SSD in the MacBook Air and MacBook Pro with retina display that can make full use of the capacity of the latest SATA (up to 6 Gb / s), hardware-accelerated GPU and more.
To test in ArsTechnica used one of the fastes.computers Mac, ever issued by Apple, – retinal MacBook Pro, which set a fast 4-core Ivy Bridge, a discrete Nvidia GT 650M graphics card and a very fast SSD-drive with a transfer rate around 470 MB / s. Of course, it is noticeable performance gain is not so much, but the editors of the resource still has conducted several tests before and after the Mountain Lion.
Geekbench, a cross-platform test to measure the “raw” speed of the processor and memory, showed only 1% of the difference between the Lion and Mountain Lion, and not in favor of the last one:
So for the next phase of the study, Chris chose 3D-Cinebench test from th.company Maxon. Speaking of graphics rendering using the CPU, the previous figures were confirmed – Mountain Lion slightly slower Lion. So the answer probably lies in the graphics subsystem.
According to results of OpenGL, Nvidia GT 650M performance increased by 4.4%, and Intel HD4000 – by 9.3%. Each graphics rendered the Cinebench test scenes with better FPS, so that users can experience in OpenGL-games and applications that use GPU-acceleration, for example, Photoshop:
According to an anonymous source ArsTechnica, Apple not only greatly improved the drivers for the GPU, but also significantly redesigned architecture graphics OS X, «clean up” the interface between OpenGL and driver for the future implementation of OpenGL 4.2 support 2. By the way, its absence caused the lower GPU performanc.compared to Windows 7:
Despite the fact that the gap between the Mountain Lion and Window.compensated by many other factors, Apple still has work to do in the future. However, such changes in the architecture of GPU should allow th.company to quickly update to OpenGL as the working group for its development will be releasing new versions of the specification.
Another important change in the graphics subsystem OS X is that Core Animation will not cause the system to constantly switch to the discrete graphics card for better performance 3. Apple has optimized this framework, and he began to work more smoothly on board adapter. The benefit of this improvement is obvious: MacBook Pro will not have to constantly switch to the discrete video when performing routine tasks and simple applications that can extend the battery life of the laptop.
Thanks to GPU-accelerated and improved graphics performance in the Mountain Lion was reduced hundreds of small delays in the animation when dragging windows, scrolling, pressing buttons, and other interface operations. It seems that all of these factors and form a sense of what the new system is faster.
In this and subsequent graphs the higher the value, the better. ? At the moment, OS X supports OpenGL version 3.2. ? That was then, but the framework is not always good at this task. ?$