The performance controls on the Settings tab are common to all Blink kernels and don't affect the output, but can improve the processing speed:
• Percentage of GPU memory to use - sets the upper limit on the amount of memory BlinkScript can allocate.
Higher values than the default 50% can improve render times, but may introduce errors if the GPU is in use by other tasks.
• Percentage of image height per tile - processing is done in tiles, where each tile is the full width of the image. Adjusting the percentage of the image height processed in any one tile can affect performance.
Higher values generally improve performance, providing that there is enough GPU memory available for processing large tiles, whereas lower values produce faster feedback to the Viewer.