Slow Syntax Highlighting with Latex

I am having problems with slow speeds when using syntax highlighting in GVim using the native latex syntax highlighting.

By slow I mean the response time between keyboard and screen is lagged.

I can confirm that it is due to syntax highlighting by turning off all highlighting--then the response time is quick as in other applications.

I have read posts by others on this topic both in this group and elsewhere. Most suggest turning off cursor line (or column) highlighting. I do not have this on.

The machine I have problems with is fairly new and fast. Moreover, I use the exact same Vim configuration files on two much slower machines and do not observe this problem with the same .tex files.

Any other suggestions as to how I can fix this?

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