Check the largest value of autoload filed in options table

Below query can help you to find which field contains the largest value of autoload field in options table.

SELECT
option_name,
LENGTH(option_value),
autoload
FROM
wp_options
WHERE
autoload = 'yes'
ORDER BY
`LENGTH(option_value)`
DESC

NOTE: change your table prefix as per your site.

WP-CLI:

wp db query  "SELECT option_name, LENGTH(option_value), autoload FROM wp_options WHERE autoload = 'yes' ORDER BY  LENGTH(option_value) DESC;"