Starting with Filter Forge 10, you can configure input caches for bitmap-based components, balancing between render speed and image quality. These inputs now have a three-dot Input Settings button:
It invokes the new Input Cache Settings dialog that allows you to specify cache settings for individual components separately. If you feel this particular component won't benefit from anti-aliasing or full-scale caching, don't hesitate to reduce the corresponding values since they affect rendering speed greatly.
The brand new setting is Bitmap Cache Resolution that allows you to shrink the rendered bitmap to improve rendering speed while sacrificing some detail. The setting of 100% corresponds to the full-size bitmap, while lower values produce a scaled down bitmap.
Other settings were already available in previous Filter Forge versions but affected all components in bulk. You can find more information about anti-aliasing and jittered sampling in the corresponding help sections.