Much of the things that mark down your page is often beyond simple control:

For example: Loading js files:

By default, references to external JavaScript files will block the page from rendering while they are fetched and executed. Often, these files can be loaded in a different manner, freeing up the page to visually render sooner.

  • /index_htm_files/highslide.js
  • /index_htm_files/roe.js
  • /index_htm_files/replaceMobileFonts.js
  • /index_htm_files/prs4.js

And again loading css files:
By default, references to external CSS files will block the page from rendering while they are fetched and executed. Sometimes these files _should_ block rendering, but can be inlined to avoid additional round-trips while the page is waiting to render. Sometimes, such as with stylesheets that are only used for loading custom fonts, inline or async CSS can greatly improve perceived performance.

  • /index_htm_files/xr_fonts.css
  • /index_htm_files/highslide.css
  • /index_htm_files/xr_main.css
  • /index_htm_files/custom_styles.css
  • /index_htm_files/xr_text.css
  • /index_htm_files/xr_all.css
  • /index_htm_files/ani.css

I remember there was a thread on here re lazy loading.
Images outside the critical viewport can be lazy-loaded.When images are lazy-loaded using loading="lazy", when they scroll into the viewport, freeing up early load for other tasks.


Here's one I don't know how to work-around:
When fonts are loaded with default display settings, like font-display="block", browsers will hide text entirely for several seconds instead of showing text with a fallback font.

  • "xr2_Gill Sans" bold normal
  • "xr5_Gill Sans1" bold normal
  • "Open Sans Extrabold" 800 normal
  • "Open Sans" normal normal

Accessability....

Axe found 4 accessibility issues: 1 critical, 3 serious,
This should be fixable:
Iframe has no title attribute nor aria-label attribute

Xara has no ability to include a 'title' nor 'aria-label' to links:
Links must have decernable text.
I use object to load my animated svg's. I was unaware these required an alt tag
<object> elements must have alt tags
Just my thoughts on these issues