Does visibility macro run LDAP queries?

When using LDAP, does this plugin cause an LDAP query to take place when the macro is encountered? I am concerned about potential performance issues or instability of our Active directory, which is the current source of authentication for lulunet, that could be caused by over usage of the Show-to/hide-from macros. Can you shed some light on this for me.

Thanks
 
silly I’m unsure
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