Hi,
1 to 4 seconds is very normal, so I do not believe there is much room there. There are a few things you can try:
1. Monitor your network traffic and see how long it takes for your web server to serve all the contents. When EO.Pdf converts a page, the first step is to load the page and all dependencies (images, CSS, JS files, etc). It will NOT start convert until all those are loaded. So if you have a single image that takes longer to load, then it will slow the whole thing down;
2. Try to set this property to false:
http://www.essentialobjects.com/doc/4/eo.pdf.htmltopdfoptions.retrievenodetext.aspxThis property does not have a significant impact on performance, but it can reduce memory usage, thus MAY improve performance indirectly.
Thanks!