Method 1 : Disabling Folder Property Indexing
The steps to do this is the following :
1/ Go to your MAIN Command And Conquer Generals Zerohour Folder where you installed Rise of The Reds.
2/ Don't go inside the Main Folder, but rather just select it.
3/ Right Click on the folder then go to Properties.
4/ Go To advanced.
5/ Uncheck " Allow Files in This Folder to have contents indexed in addition to file properties "
6/ Press okay.
Method 2 : CPU prioritization
Be warned, I am not 100% sure whether this is a valid method to further increase preformance but it's there if you wanna do it.
1/ Run Rise of The Reds.
2/ Open Task Manager.
3/ Click on "Further Details"
4/ Now you should have more toolbar options on top, from there go to "Details"
5/ Search for general.exe , click on it then.
6/ Right click on it, and then drag your cursor to "Set Priority"
7/ Change Priority from Normal to High.
Method 2.5 : Removing Junk Files
Incase you like to edit the game as well, in particular maps / scripts, or just for checking ,
1/ Go to The Comamnd And Conquer Generals Zerohour Document File
2/ Delete a file named "_tmpChunk.dat"
Bonus : Installing Gentools and setting FPS Limit to 480 makes the game look smoother and less stutery though it sometimes work, sometimes not.