update cache - how do we use it?

[pennsylvaniaron]

I hear that the update cache file (?) makes loading updates faster? If so how it it used when making a slipstreamed disk from an original, say win 7 iso, with sp1 already integrated. regards...

[Legolash2o]

It mostly affects how long it takes to load into the lists and if you have LDR/QFE option enabled, it tells WinToolkit if it's worth extracting or not.