Site very slow : how to defer parsing javascript ?

[caroled01]

Hello,

I have install version 1.7.4.2 on which there is a very long loading time..

The analyze on GTmetrix shows that : "Defer parsing of Javascript".

But I can't find anywhere how to fix it.

Is someone have an idea ?

This is a printscreen : http://prntscr.com/ktet6h

Thank you very much for your help.

Edited September 12, 2018 by caroled01 (see edit history)

[nicoX]

That's not a big deal. You don't have to do anything about that.

Are you on a shared hosting? Maybe the hardware is not the best.

If you describe more I might be able to help you.

[caroled01]

Hi,

Thank you for your answer !

I'm not on a shared hosting. I have a dedicated server.

I have my actual site (in version 1.6.1.6 on the same server and it's not slow.

What kind of information would you need ?

[nicoX]

What's the URL of your 1.7 site. I'm doing the test with the URL in your printscreen and it loads fine.

Edited September 24, 2018 by nicoX (see edit history)

[El Patron]

defer refers to .js attribute.  aysnc/defer/none

when moudle (appl) registers it's .js within PS it can optionally specificy .js attribute.

this is new in 1.7....'asset manager'...via webpack/etc

developers need to write their .js to support defer and register accordingly, maybe in future we see PS  make this a requriement as that is about the only way to get developers to adopt best practice.

====

for slow, most often during build dev disablels smarty cache so updates are reflected without clearing cacahe...  (see performance page).

 

happy selling el

 

Edited September 24, 2018 by El Patron
spelling (see edit history)

[PrestaMake]

On 12/9/2018 at 5:21 AM, caroled01 said:

Hello,

I have install version 1.7.4.2 on which there is a very long loading time..

The analyze on GTmetrix shows that : "Defer parsing of Javascript".

But I can't find anywhere how to fix it.

Is someone have an idea ?

This is a printscreen : http://prntscr.com/ktet6h

Thank you very much for your help.

 

I am seriously thinking that is your Internet Speed, because your site is super ultra fast!! No jokes, it loaded all pages very quickly for me (I am from South America).

Edited September 24, 2018 by Daniuz (see edit history)

[caroled01]

Thank you very much for all your answers.

The URL of my 1.7 site is www.grispastel.fr/grispastel_1.7.4.2

It's nice to know you find it's loading fast. When I test with google PageSpeed Insights the results are very bad, so I don't know what to think.

My actual site in 1.6 (www.grispastel.fr) gives good results with google page speed.

 

[nicoX]

It's fully loaded in 7 seconds.

Using "https://gtmetrix.com/reports/www.grispastel.fr/4KkZaktr" I can see you have 301 and 302 move and redirects for http than is taking the initila wait of 1+ second for the site to start loading https://.

You should remove those move/redirect to fix that. You can do it in PrestaShop backend or through a .htaccess file.

To further improve the caching of your images, you can put your site on Cloudflare.

[El Patron]

Hi, sorry for bump but this had not been solved until now.  

JavaPro Advanced JavaScript Performance Manager for PrestaShop

Forum post here

From our store here