Ensure your system meets the recommended specs for modern SC2 play, as insufficient RAM can bottleneck data preparation: 4 GB Recommended (8 GB preferred for modern systems).
Instead, upon first launch (or after a major patch/driver update), the game does the following: starcraft 2 preparing game data
So the next time you sit in that loading screen, don’t tab away. Smile. The game is already preparing for your greatness. Ensure your system meets the recommended specs for