vue项目上线后，无法获取部分接口数据，本地测试无问题（初步估计网速慢导致），怎么优化处理

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问题描述vue项目上线后，无法获取部分接口数据，本地测试无问题（初步估计网速慢导致），怎么优化处理问题出现的环境背景及自己尝试过哪些方法上线后出现的问题相关代码// 请把代码文本粘贴到下方（请勿用图片代替代码）_getSongMenu() {            if(!this.disc.dissid) {                this.$router.push('/recommend')                return             }             getSongMenu(this.disc.dissid).then((res) => {                if(res.code === ERR_OK) {                    console.log(res.cdlist[0].songlist)                    // this.songs = this._normalizeSongs(res.cdlist[0].songlist)                     this._normalizeSongs(res.cdlist[0].songlist, (rest) => {                        this.songs = rest                     })                 }             })         },         _normalizeSongs(list, callback) {            if(!list) {                return             }            let rest = []            let index = 1             list.forEach((musicData) => {                if(musicData.songid && musicData.albummid !==undefined) {                    let promise = getSongVkey(musicData.songmid) //获取歌曲filename及vkey                     promise.then((res) => {                        if(res.code === ERR_OK) {                            const resData = res                            const filename = resData.req_0.data.midurlinfo[0].filename                            const vkey = resData.req_0.data.midurlinfo[0].vkey                            const newSong = createSong(musicData, filename, vkey)                            // console.log(newSong)                             rest.push(newSong)  //将获取到的歌曲加入到数组中                             if(index === list.length) {                                 callback && callback(rest)                             }                             index++                         }                     })                 }             })         }通过songs属性传递songs这个数组数据从disc.vue->music-list.vue->song-list.vue本地点击测试能获取到vkey，如图线上却获取不了中间件music-list.vue,放线上后会有一段loading时间你期待的结果是什么？实际看到的错误信息又是什么？我该在哪里改成延时吗，filename都能获取，就vkey获取不了项目地址