Follow the link to read how the guy did it, step by step and with the tools he used. It’s an impressive work on top of it being nicely documented.
“How I cut GTA Online loading times by 70%”
T0STÂ 2021-02-28 => https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times-by-70/