\timing in PL/pgSQL language in SQL file

Hi, I know how timing work in postgresql prompt, how I do is to type \timing.

However, I have created a sql file that is based on PL/pgSQL language, for example, the sql file looks like the following,

CREATE OR REPLACE FUNCTION make_plpgsql()
RETURNS VOID
LANGUAGE SQL
AS $$
CREATE LANGUAGE plpgsql;
$$;

for loop on some tables

\timing <----------------------- gives me error
for loop on some tables...
\timing

$$LANGUAGE plpgsql;


The error is like the following,

psql:test.sql:78: ERROR: syntax error at or near "\"
LINE 39: \timing
^

How do I make timing work in PL/pgSQL language in SQL file? Thank you.

You can't \timing is a psql (only) command and does not work inside a function.

You need to do the timing when using the function in psql, basically something like this: