5.Performance（性能）
Floating Point Instructions
精度浮点数指令
In order to accurately and quickly apply transformations and effects to items, Graphics View is built with the assumption that the user's hardware is able to provide reasonable performance for floating point instructions.
为了精确和快速的将坐标变换和特效应用到图形对象上，图形视图在编译的时候默认用户的硬件能够为浮点指令提供合理的性能。
Many workstations and desktop computers are equipped with suitable hardware to accelerate this kind of computation, but some embedded devices may only provide libraries to handle mathematical operations or emulate floating point instructions in software.
很多工作站和桌面电脑都配备了适当的硬件来加速这种类型的计算，但是一些嵌入式设备可能仅仅提供了处理数学运算的库，或者需要用软件来模拟浮点指令。
精度浮点数指令
In order to accurately and quickly apply transformations and effects to items, Graphics View is built with the assumption that the user's hardware is able to provide reasonable performance for floating point instructions.
为了精确和快速的将坐标变换和特效应用到图形对象上，图形视图在编译的时候默认用户的硬件能够为浮点指令提供合理的性能。
Many workstations and desktop computers are equipped with suitable hardware to accelerate this kind of computation, but some embedded devices may only provide libraries to handle mathematical operations or emulate floating point instructions in software.
很多工作站和桌面电脑都配备了适当的硬件来加速这种类型的计算，但是一些嵌入式设备可能仅仅提供了处理数学运算的库，或者需要用软件来模拟浮点指令。
As a result, certain kinds of effects may be slower than expected on certain devices. It may be possible to compensate for this performance hit by making optimizations in other areas; for example, by using OpenGL to render a scene. However, any such optimizations may themselves cause a reduction in performance if they also rely on the presence of floating point hardware.
这样，在某些设备上，某些类型的特效可能要比预期的慢。有可能可以在其他方面进行优化来弥补性能上的损失，比如说用 OpenGL来绘制场景。不过，如果优化本身是依赖于浮点计算硬件的话，可能都会带来性能上的损失。