[arch-general] why is sage-mathematics so huge?

Hi, I just noticed that there is a sage-mathematics package in community repository and tried to install it and found out that the package is really huge. I understand that sage is always shipped in a gigantic bundle, but the arch package is considerably larger than official packages provided for other Linux distributions. For lzma compressed archives, they are typically around 330MB, while the arch package is about 630MB. Why is the package so big? I have just noticed that the arch version is 4.5.3, the version on its official site is still 4.5.2. Is this the reason for the big package? Thank you for your kind attention. Yours,