Auto-Hyperlink URLs causes relatively high server load

Hi,

While this plugin produces quite exactly the markup I’m looking for I wanted to note a discovery I found when profiling the site on newrelic. It is in the top 3 for causing PHP activity which I didn’t expect since it is really only affecting a small number of pages (and unlike the heavier ones it’s not ‘obviously heavy’).

I think I can simply do the limited amount of content by hand at this point but figured I should mention the issue and maybe see what could be improved if possible.

My current settings are:
hyperlink email address
strip URI scheme
open auto hyperlinked links in new window
require explicit uri scheme
hyperlink mode/truncation: 35
text to show before link truncation: (none)
after link truncation: …
extra domain extensions: (none)
exclude domains: (none)

Thank you!