Yandex metrika tag slowing down site speeds google page speed isights reporting

问题

So on all my web pages i have this code what is used by Yandex metrika for analytics. According to google this script is slowing down my pages and needs something changing in the way it loads to not be render blocking, TTI time to input blocking, FID first input delay blocking, First contentful paint blocking.

<script data-cfasync="false" type="text/javascript">
   (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
   m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
   (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

   ym(XXXXXXXX, "init", {
        clickmap:true,
        trackLinks:true,
        accurateTrackBounce:true,
        webvisor:true
   });
</script>

Googles page speed reports the following https://developers.google.com/speed/pagespeed/insights/

What can i modify the Yandex metrika javascript to in order to fix this issue ?

回答1:

You don't have many options I am afraid as it is a third party script.

One option to improve your score and perceived load times is to wrap the call to the function in a setTimeout set long enough to delay loading the script until the essential content is loaded.

<script data-cfasync="false" type="text/javascript">
  setTimeout(function(){
       (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
   m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
   (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

       ym(XXXXXXXX, "init", {
            clickmap:true,
            trackLinks:true,
            accurateTrackBounce:true,
            webvisor:true
       });
    }, 5000); //set this as high as you can without ruining your stats.
</script>

This is definitely a workaround and I would instead advise using a different library that is less bloated if you can find one.

回答2:

<script data-cfasync="false" type="text/javascript">
(function(){
var a = function() {try{return !!window.addEventListener} catch(e) {return !1} },
b = function(b, c) {a() ? document.addEventListener("load", b, c) : document.attachEvent("onreadystatechange", b)};
b(function(){

   (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
   m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
   (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");

   ym(XXXXXXXX, "init", {
        clickmap:true,
        trackLinks:true,
        accurateTrackBounce:true,
        webvisor:true
   });

}, false);
})();
</script>

回答3:

One option is to use old Yandex Metrika code (new Ya.Metrika...). You can view the old code if you set checkbox in advanced settings of the Metrika. Old code has some limitation but it's much smaller and few times faster.

回答4:

Disabling clickmap and webvisor could help.

来源：https://stackoverflow.com/questions/59381870/yandex-metrika-tag-slowing-down-site-speeds-google-page-speed-isights-reporting