網(wang)站速(su)(su)度(du)(du)如同手機，就會發現在使用一(yi)段時間后速(su)(su)度(du)(du)變(bian)慢(man)，不(bu)如一(yi)開始迅速(su)(su)。手機每用一(yi)天都是損耗，難到網(wang)站也有損耗？當然網(wang)站不(bu)能與手機相提并(bing)論(lun)，很(hen)多方面都不(bu)同，但速(su)(su)度(du)(du)一(yi)直是網(wang)站運營(ying)中要解決的(de)問(wen)題。在日(ri)常不(bu)斷更新中，內容量越(yue)來越(yue)多，而(er)且(qie)還有很(hen)多不(bu)穩定因(yin)素導致加載速(su)(su)度(du)(du)變(bian)慢(man)，那么網(wang)站建設(she)有哪些縮短加載時間的(de)妙技呢(ni)？

       一、對圖片(pian)進行優化

　　相對文字，網站建設對于圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)的加載(zai)時(shi)(shi)間要(yao)(yao)(yao)花得更多(duo)(duo)(duo)。大多(duo)(duo)(duo)數(shu)圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)要(yao)(yao)(yao)比文字大，很(hen)多(duo)(duo)(duo)時(shi)(shi)候(hou)訪問一(yi)(yi)個網(wang)站(zhan)都是(shi)文字先(xian)出現(xian)，而圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)處于加載(zai)中(zhong)。因(yin)此(ci)要(yao)(yao)(yao)縮短加載(zai)時(shi)(shi)間需(xu)要(yao)(yao)(yao)從(cong)圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)入手，對圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)進行優化(hua)才能有效提高(gao)網(wang)站(zhan)速度。先(xian)說說Banner圖(tu)(tu)(tu)(tu)(tu)，一(yi)(yi)般展(zhan)示型網(wang)站(zhan)都有這個欄(lan)目，常(chang)常(chang)用于產品(pin)廣告(gao)宣傳，是(shi)一(yi)(yi)種廣告(gao)圖(tu)(tu)(tu)(tu)(tu)位，而且占用位置比較大，圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)尺寸也(ye)比較大，那么就要(yao)(yao)(yao)從(cong)圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)質量開始改善。當圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)已(yi)經(jing)設計成指定尺寸后，如果圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)中(zhong)的元素越多(duo)(duo)(duo)，圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)質量就會越大。因(yin)此(ci)當圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)進行保存時(shi)(shi)，需(xu)要(yao)(yao)(yao)選擇較低畫(hua)質，單張圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)控制(zhi)在300字節(jie)左右較適宜。整(zheng)個網(wang)站(zhan)除了Banner，更多(duo)(duo)(duo)的就屬產品(pin)圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)，制(zhi)作方法是(shi)一(yi)(yi)樣的，在設計之(zhi)后保存時(shi)(shi)要(yao)(yao)(yao)選擇低質，圖(tu)(tu)(tu)(tu)(tu)片(pian)(pian)(pian)(pian)(pian)小(xiao)而清晰為佳。

　　二、內容分發網絡(luo)(CDN)

　　內(nei)(nei)容(rong)(rong)分發網(wang)絡簡稱(cheng)為CDN，是(shi)(shi)一(yi)種(zhong)有(you)利(li)于(yu)提升速度的方(fang)(fang)法(fa)。這(zhe)種(zhong)方(fang)(fang)法(fa)就(jiu)是(shi)(shi)把網(wang)站(zhan)內(nei)(nei)容(rong)(rong)緩(huan)存到(dao)服務(wu)器里，當(dang)客戶有(you)請求的時候能夠迅速調(diao)(diao)用出來(lai)，如此縮短(duan)加(jia)載時間。對內(nei)(nei)容(rong)(rong)減(jian)少了(le)響應(ying)，服務(wu)器壓力調(diao)(diao)小使網(wang)站(zhan)訪問更穩定。很多時候客戶在訪問網(wang)站(zhan)時，內(nei)(nei)容(rong)(rong)需要(yao)一(yi)次次被(bei)請求才能顯示出來(lai)，CDN就(jiu)是(shi)(shi)從這(zhe)些減(jian)少對服務(wu)器的請求，從根(gen)本上縮短(duan)時間，讓內(nei)(nei)容(rong)(rong)呈現(xian)更快。

　　三、刪除冗余代碼(ma)

　　處于(yu)(yu)網(wang)絡信息時代(dai)的(de)我們，選擇獲取信息的(de)方(fang)法有很多，因為選擇多了在瀏覽的(de)時候容(rong)易(yi)(yi)出現盲(mang)目行(xing)為，不會(hui)在一個網(wang)站(zhan)里(li)過于(yu)(yu)認真研(yan)究，更多的(de)是(shi)(shi)(shi)匆匆一覽。讓網(wang)站(zhan)加載速度(du)更快，那(nei)么就要(yao)選過慮站(zhan)內(nei)冗(rong)余代(dai)碼(ma)。編程代(dai)碼(ma)本身(shen)是(shi)(shi)(shi)組成網(wang)站(zhan)的(de)基本要(yao)素，然而對(dui)(dui)于(yu)(yu)速度(du)或者優化都(dou)有一定影(ying)響。有時候一個程序(xu)員(yuan)只(zhi)懂(dong)得網(wang)站(zhan)建(jian)設，但(dan)未必懂(dong)得優化，只(zhi)根據企業對(dui)(dui)網(wang)站(zhan)的(de)需(xu)求進行(xing)制作(zuo)，如此一來容(rong)易(yi)(yi)產生冗(rong)余的(de)代(dai)碼(ma)，不僅影(ying)響加載還影(ying)響SEO效果。作(zuo)為一個專業程序(xu)員(yuan)，是(shi)(shi)(shi)很容(rong)易(yi)(yi)發現網(wang)站(zhan)中這些代(dai)碼(ma)的(de)，只(zhi)要(yao)進行(xing)刪(shan)除，代(dai)碼(ma)得到(dao)優化，就能(neng)夠縮短加載時間(jian)。