What you use to do your editing, the better it is the fast you can work.
The sort of hardware that is necessary for photo editing will vary based on your level of prowess as well as a few other aspects including end usage for those image. Let's say that you are looking to start selling your images online on stock websites. You will need to make sure that your images are shot as clean as possible, with a very high resolution and the ability to produce a high degree of detail. Clean denotes the ability to produce images which have a low amount of noise.
For such a high quality professional requirement, you will need a camera that has a high megapixel capability. You will also need a lens that is optically very sharp. That produces the perfect match up of sharpness and resolution.
Next is the processing requirement. You will need to post-process with either Photoshop or Lightroom, preferably Photoshop, or some equivalent software for a high degree of editing flexibility. The hardware that you use will enable a faster processing speed and quicker booting of the applications. Ideally an Intel Core i7 8th generation processor with 32 GB of RAM and a decent 256 GB of SSD is the perfect combination. The latest generation processor is Core i9 which is quite expensive. Core i7 is a good enough processor to work with.
The presence of SSD ensures that the applications as well as the operating system boots very fast leading to extremely low lag time.
Another aspect of the editing platform that needs mentioned here is the display. You need a good display resolution along with a large enough display. 27" is a good display size. Just to clarify we are referring to computer monitors and not laptops. With it you need a resolution of UHD (3840 x 2160. That will ensure that your images are displayed in a large enough size for convenient editing workflow.