Why do scrolling load or click to load more of this function?

recently, one of the requirements of the vue project is to click to load more functions, and then Baidu sees that everyone is saving the data into an array, and then click to load (that is, to get the value of the array).
there is a question here. Why do click loading speed up the loading speed of the page, so is the return of js data slow or the page rendering slow?
according to everyone"s answer from Baidu, it feels that the data rendering page is slow.

Mar.26,2022

render slowly.
and demand loading is also more scientific. Users may only need to look at 20 entries and select them.


is actually loading on demand. If users want to see more information, I will load more information.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaf437-223c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaf437-223c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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