php - In mysql, is it more efficient to use int type as a primary key field than char type?

Question

In mysql, is it more efficient to use int type as a primary key field than char type?

Due to business requirements, it is necessary to use a timestamp and a 2-digit random number to form the ID.
For example: 149561542040, a total of 12 digits.
If the ID field uses integer bigint, will it be more efficient than using char?

Answer 1

In terms of space, BIGINT occupies 8 bytes and CHAR occupies 12 bytes.
The difference is obvious in massive data. In terms of efficiency, INT is more efficient

Answer 2

Personally, I feel there is a difference in efficiency.
Integer types have efficient methods for sorting and searching.
Char should be much weaker