quick-redisplay « 0

Controls window updating when you have more than on window open on the same buffer and you make changes to a part of the buffer visible in multiple windows.

If quick-redisplay is non-zero, Emacs will not keep all windows updated as you type -- this makes display updating much faster. All changes will eventually be applied to all windows.

When quick-redisplay it is set to zero, all windows are always accurate.

query-replace-use-region-for-search « 0

Controls how the query replace functions default the search string. When ON and there is a region selected it is used as the search string defualt.