Loading issue on Chrome for my WordPress theme

Your queries are not the issue, those should be handled without a problem.

I can’t say for sure without really digging into this but I would start with optimizing your page. Your thumbnails are like 4-6 MB each. I could optimize these images down to 20K without losing quality.

enter image description here

The initial page load takes 22 seconds and that is in Chrome and Firefox.

The flickering issue I think has to due with the fixed sidebar. There is an onscroll event being fired every time you scroll the page that chrome has a hard time handling but that very well could be due to the massive page size.

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