Page load blocking javascript problem

I am looking for someone to advise how to optimise the page load time of a website.

The page that I am testing is at https://clinics.flintplusflint.com/load-speed.htm

The banner section seems to have to wait for the page to load fully before rendering. I have tried using "async" within the js tags, but this then does not load the js and stacks the banner images on top of each other.

Any help would be gratefully received.
rwlloyd71Asked:
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gskTechnology consultantCommented:
Hi rwlloyd71,

please reduce image sizes,compress the images, optimise the css files,please use async as well as defer in code .
even if any sql queries please see the execution time for sql queries (if any running behind)

thanks
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gskTechnology consultantCommented:
To add further I feel much images are there please work on images.
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ste5anSenior DeveloperCommented:
What concrete problems do you have? The page seems to load pretty fast..

Do you mean by "banner" (I haven't seen one) the carousel images?

One problem may be the errors on your page..
Capture.PNG
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gskTechnology consultantCommented:
Hi rwlloyd71,

please mention your pixel image sizes ,please reduce it to 50 % ,it will improve a lot for sure.

thanks
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rwlloyd71Author Commented:
Hi all,

The slick banner below the menu "hangs" until the page loads fully, as you can see between 8seconds and 10 seconds on this video:

https://cl.ly/3aae216a2428

This is what I am try to resolve
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rwlloyd71Author Commented:
This is a screen shot of the problem:

Loading issue
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rwlloyd71Author Commented:
This images have been optimised.
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ste5anSenior DeveloperCommented:
Cannot reproduce this on Edge, FF and Chrome (all current).
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gskTechnology consultantCommented:
please clear cache ,is website in wordpress?please specify used tools and libraries
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rwlloyd71Author Commented:
Thank you for all your comments.

The site is built in PHP (no frameworks or libraries).

It would appear that the problem is not persistent across all browsers from the feedback you have all given, so I am going to close this question and see if I can isolate the problem.

I am sure that it is to do with the "waterfall" cascade of js components being loaded. The carousel must be waiting on something before it displays. I can't see what though.

If any one can advise, please chip in!
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ste5anSenior DeveloperCommented:
If any one can advise, please chip in!
Remove the JS errors on all pages.

JS errors can trigger sometimes nifty effects.
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Julian HansenCommented:
The slick slider is loading inside the following
<ul class='V3_banner_slider'>

Open in new window


Because this does not have a height specified it appears to "jump" when the slider loads. What you could do is give it a height of 564px with a background image so it does not have that jumping effect when the slick code suddenly kicks in.
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rwlloyd71Author Commented:
Great idea Julian. Thanks.

Is there any way that I can get this to work with a responsive screen. the Image height will be proportionally shorter on a narrower screen, so If I have a fixed height, it will display a massive space on a mobile.
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Julian HansenCommented:
Just use media queries - pick 3 sizes and cater to those with media queries.
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rwlloyd71Author Commented:
Thanks!
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rwlloyd71Author Commented:
Thanks all for your help
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Julian HansenCommented:
You are welcome.
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