Better bundle size generation

[nonzzz]

TL;DR

Plugin has been released for a long time. During this time, we have many users. Compared with other community plugins, user are often confused about the actual compressed size. So i wonder if there is a better way to get the actual size?

Content

Actually, the current chunk size calculation depends on the correct sourcemap. So if someone don't respect the sourcemap it'll affect the final result. (Because we need the correct sourcmap to get boundaries of each chunk.)