So to make it stop, you have to force the game to use a different, more efficient renderer-specifically Vulkan. I'm no tech expert, so I might be getting some details wrong here, but as far as I can tell, the stuttering is caused by an outdated and/or poorly implemented Direct3D/DirectDraw renderer. After several hours of scouring Reddit threads, blogs, and posts on GTAForums, trying countless alleged 'fixes' that made absolutely no difference, I discovered the root of the problem. Replacing that process with a hash table that can quickly check for duplicates led to a roughly 25 percent load time reduction on its own, T0st writes.Or it was. Simply caching that string length value to speed up those checks resulted in an over 50 percent reduction in load times on its own, T0st writes.Īfter parsing all this JSON data, GTA Online seems to load it into an array in an extremely inefficient way, checking the entire array for duplicates from scratch as it grows. Parsing a 10MB file shouldn't be too much of a problem for a modern computer, but a few obscure problems in the specific implementation seem to lead to massive slowdowns.įor one, the specific function used to parse the JSON string (seemingly sscanf, in this case) was apparently running a time-intensive strlen checking function repeatedly after the read for every single piece of data. The JSON file in question appeared to be the "net shop catalog" that describes every single item GTA Online players can purchase with in-game currency.
After using a tool to dump the process stack and disassembling the GTA code as it was running in memory, T0st noticed a set of (somewhat obfuscated) functions that seemed to be parsing a 10MB JSON file with over 63,000 total entries. To get to the bottom of the problem, T0st writes that they started by profiling their own CPU to try to figure out why the game was maxing out a single CPU thread for over four minutes during loading.
The problem is even harder to understand when the single-player Grand Theft Auto V tends to load many times faster. That's not a scientific survey or anything, but even accounting for self-selection and reporting issues, those load times are very long, especially for such an old game. An anonymous Reddit poll last year found that roughly half of players were waiting three to six minutes for the game to load up, and about 35 percent of players waiting even longer to start every session. Further Reading Take Two cancels plans to stop printing money via Grand Theft Auto Online Grand Theft Auto Online's PC load times have been a persistent issue for seven years now, remaining slow despite general improvements to hardware and the game's status as a continuing lucrative revenue stream for publisher Take Two.
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