This is the documentation page for Module:Preview expense
This module is weird: it's not meant to be used, just previewed. The purpose is to find out how many expensive function calls appear before a given point within a page. That helps people to examine where the problem is in long, complicated pages and tables.
To prevent saving this by accident, the module creates a link to a blacklisted site (one which no longer exists) which is not displayed, but trips the blacklist warning if Save is pressed. And if you manage to save it anyway, the count isn't accurate (usually 0) and the page shows up in Category:Pages with too many expensive parser function calls, so don't.
UsageEdit
Template:Tlm entered in the preview window.
ParametersEdit
None
Simulated sample outputEdit
There are 31 expensive function calls before this point