With the launch of the first Xcom 2 expansion just around the corner, (called Anarchy's Children and available from March 17) Firaxis has released the first massive patch for the game. This patch introduces various improvements, balance changes, and several performance optimisations, that should improve the frame-rate and reduce the delays in-game.
As stated in the full patch notes, players can now also opt for the new "Zip Mode" option, which allows you to pause the game at any time, creating "a faster paced experience that speeds up animations and some delays in gameplay."
After installing the patch, Firaxis also recommend going into the graphics tab under options and select "Auto Detect Graphic Settings." Installing the patch will not rewrite your graphic settings. Players must do this manually.
For more information on all update details, you can visit this link.