Just found a manga about a speedrunner getting trapped in his preferred speedrun game and it's hilarious
@anomalocarididae If he doesn't autism infodump the math & computer science behind why he needs to hold the A button for three hours straight to activate a buffer overflow & overwrite his inventory I'm not reading it!!!!!!! (I will read it anyway)

@anomalocarididae Oh my god yes

What's the name?

OK found it, "Speedrunner Cannot Return from the Game World"