Does anyone know of a great gallery plugin which isn't heavy on resource request

Hi

the site in question https://www.uksocascene.com/soca-pictures
theme: nevada

I run a media site for a small niche music genre called soca. part of what we do is go to events, take pictures and display the pictures on our website. we can typically create a gallery of 100-200 pictures. we are out a lot which means we have a lot of galleries and a lot of pictures.

the plugin we are currently using is called ‘fancy gallery’ by radikal.
it s good gallery with good functionally but i creates a lot of resource requests. this has lead to us being kicked off our shared server. we are now on a vps server but the site is very slow and it is believed the galley causes the site to time out and present a ‘500 internal server error’.

pictures are a big part of what we do and i would really appreciate a solution to this problem.

there is also a side problem which could be a bi-product of this initial problem.

i have recently migrated my site from the shared server to the vps. the site displays well, but it doesn’t display any new posts (unless i am logged in).
so, i create a new post, publish then view. as i am logged in i can see the post, but the user (anyone not logged in) cant see any new post since the new migration. the posts exists if i were to send you a url you would see it, but it just not pulling through on the front-end. any help with this would be much appreciated

thanks