golang 判断 pc mobile

---

判断是否移动设备访问
var FilterMember = func(ctx *context.Context) {
    fmt.Println(ctx.Request.UserAgent())
    keywords := []string{"Android", "iPhone", "iPod", "iPad", "Windows Phone", "MQQBrowser"}    
        for i := 0; i < len(keywords); i++ {
            if strings.Contains(ctx.Request.UserAgent(), keywords[i]) {
                ctx.Output.Body([]byte(`phone`))
                return
            }
        }
        ctx.Output.Body([]byte(`pc`))
}

---

移动设备特征字符串

iphone,android,phone,mobile,wap,netfront,java,opera mobi,opera mini,ucweb,windows ce,symbian,series,webos,sony,blackberry,dopod,nokia,samsung,palmsource,xda,pieplus,meizu,midp,cldc,motorola,foma,docomo,up.browser,up.link,blazer,helio,hosin,huawei,novara,coolpad,techfaith,alcatel,amoi,ktouch,nexian,ericsson,philips,sagem,wellcom,bunjalloo,maui,smartphone,iemobile,spice,bird,zte-,longcos,pantech,gionee,portalmmm,jigbrowse,hiptop,benq,haier,^lct,320x320,240x320,176x220,windows phone,cect,compal,ctl,lg,nec,tcl,daxian,dbtel,eastcom,konka,kejian,lenovo,mot,soutec,sgh,sed,capitel,panasonic,sonyericsson,sharp,panda,zte,acer,acoon,acs-,abacho,ahong,arness,anywhereyougo.com,applewebkit/525,applewebkit/532,asus,audio,au-mic,avantogo,becker,bilbo,bleu,cdm-,danger,elaine,eric,etouch,fly ,fly_,fly-,go.web,goodaccess,gradiente,grundig,hedy,hitachi,htc,hutchison,inno,ipad,ipaq,ipod,jbrowser,kddi,kgt,kwc,lg ,lg2,lg3,lg4,lg5,lg7,lg8,lg9,lg-,lge-,lge9,maemo,mercator,meridian,micromax,mini,mitsu,mmm,mmp,mobi,mot-,moto,nec-,newgen,nf-browser,nintendo,nitro,nook,obigo,palm,pg-,plystation,pocket,pt-,qc-,qtek,rover,sama,samu,sanyo,sch-,scooter,sec-,sendo,sgh-,siemens,sie-,softbank,sprint,spv,tablet,talkabout,tcl-,teleca,telit,tianyu,tim-,toshiba,tsmutec,utstar,verykool,virgin,vk-,voda,voxtel,vx,wellco,wig browser,wii,wireless,xde,pad,gt-p1000
这有个问题 如果访问量很大的话有没有更高效的方法