The best order of Develop operations to increase performance is as follows:
- Spot healing.
- Geometry corrections, such as Lens Correction profiles and Manual corrections, including keystone corrections using the Vertical slider.
- Global non-detail corrections, such as Exposure and White Balance. These corrections can also be done first if desired.
- Local corrections, such as Gradient Filter and Adjustment Brush strokes.
- Detail corrections, such as Noise Reduction and Sharpening.
Note: Performing spot healing first improves the accuracy of the spot healing, and ensures the boundaries of the healed areas match the spot location.
According to https://helpx.adobe.com/lightroom-classic