What is fast to execute and low on CPU - Reading Denormalized data from db (stored as binary) in table or Reading the same from binary file?

Question

When it comes to performance for e-commerce site, what do you suggest from following two options:

1. Reading Serialized De-normalized data stored in separate table in db as binary? OR
2. Reading Serialized De-normalized data stored in file as binary?

With at least three tables / binary file to be read for each page request?

Answer 1

1. 因为要将其存储在文件中，您必须首先将其写出数据库？