Least server intensive shoutbox

[AzH]

My forum on shared hosting has suffered through many CPU Exceeded errors and most can be traced back to either the Shoutbox or vBSEO. I'm less concerned about vBSEO and more concerned about the Shoutbox as it is the favourite feature used by the community. My question is, which is the least server intensive shoutbox? Thank you.

[Paul M]

I would think they are all intensive, that's the nature of shoutbox software.

[Marco van Herwaarden]

There are already a few threads discussing the same topic.