To compensate for this, different values are assigned to the pixels surrounding the edges, which helps give a visual illusion of smoothness and makes the type more pleasant to view and easier to read. This is a 1K file. Anti-aliased graphics have smooth edges, but the smoothness comes at a file size price. This file is a 2K file. Don't anti-alias when file size is critical.
Many designers think that anti-aliased graphics always look better.
While aesthetically this may be true, when you take the file size into consideration, you may decide your readers will benefit more from quick loading that smooth curves. Don't anti-alias small type. Anti-aliased type becomes blurry at small sizes. Two layers of the same anti-aliased type can improve the legibility. Use special effects judiciously.