The difference between session and cookie

1、 Data storage location ：cookie The data is stored on the client's browser ,session Data on the server .

2、 Security ：cookie Not very safe , Others can analyze the local cookie And carry on cookie cheating , Should be used in consideration of safety session.

3、 Server performance ：session It will be saved on the server for a certain period of time . When visits increase , It will take up the performance of your server , Consider reducing server performance , Should be used cookie.

4、 data size ： Single cookie The saved data cannot exceed 4K, Many browsers limit a site to save at most 20 individual cookie.

5、 Information importance ： Consider storing important information such as login information as session, Other information if needed to be retained , Can be placed in cookie in .
 

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