When Mini Program slides swiper-item, when sliding to an item, when setData loads new item and renders again, sliding stutter

I render the arrays in data to each swiper-item , and then set to load only 10 swiper-item when entering the interface for the first time. When you slide to the ninth swiper-item , run the load function to get 10 new pieces of data, and then concat into the long function. The data will be re-rendered, but at the same time, there will be stutters when sliding, or directly stuck, can no longer slide, can only exit Mini Program and then enter to restore the problem.

    if(!firstRequest) {
        var appList = pageData.data.app;
        pageData.setData({
            app: appList.concat(appListNew)
        });
    }
    else {
        pageData.setData({
            app: appListNew
        });
    }

do you bosses have the same problem? Please give me some advice.

Mar.01,2021
Is

loaded automatically or manually? It seems that it should be automatically loaded while rendering data and stuck, I think we can go to the ninth picture, before rendering the new image, change autoplay to false, should be fine.

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-64f5-1b2c13d-2bb14.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2c13d-2bb14.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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