How to quickly write millions of data

[小陆]

The current method seems too slow
I want to create a new Excel file and write 1 million data lines by lines. How should I write code.
How can we do it the fastest

32 seconds is too long

Is there a way to add line by line
For example: file_put_contents ("", FILE-APPEND);

or

let row_index = 0;
let values: Vec<&str> = vec!["Value 1", "Value 2", "Value 3", "Value 4"];
worksheet.add_row_string(row_index, &values);