There is a java cache in which dragmath is loaded, but I have found no way to speed up initial loading when you first open your browser. The speed is the reason that it is often quickest to use asciimathml unless the equation is very complex, and in that case use dragmath and save in dragmath format or export and make the syntax available in the text expression format you otherwise use.....

We have been experimenting with EqEd, an asciimath method of allowing you to insert equation primitives which is much faster but much more limited as well and the packages that Mauno has been working on for tinyMCE I think include that (and I have posted links to sites where you can see EqEd elsewhere in this forum.)