Vim writing to disk with every single keypress...why?

When using Vim, I observe a write to disk upon every single keypress.
Every single time I press a key the HD light blinks. When I start Vim
like so:

vim --noplugin

...I notice this is not the case. I'm guessing a particular plugin may
causing this "write with every keypress" behavior...how might I go
about discovering the cause?

Thanks for any help,

John

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John Magolske
http:/B79.net/contact

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