FastDoom is an optimized version of the original Doom game, focusing on improved performance and efficiency. The discussion highlights various aspects of its development, including community contributions and technical enhancements related to memory management and processing speed. Notable comments mention the use of mTCP's NetDrive for network storage options, and insights from discussions with key figures in its development like Ken Silverman, who worked on performance fine-tuning. Players express enthusiasm for the game’s continued improvements while addressing nostalgia and gaming culture references.