Explaining GTA Online's Accidentally Quadratic Parsing | sscanf in C Programming
GTA Online is notoriously slow to start up. And it seems like the problem is in ... the C library!! Due to the way a certain function is implemented in C library, the start up becomes accidentally quadratic.
In this video I explain how sscanf caused GTA Online's accidentally quadratic parsing.
Original blog: https://nee.lv/2021/02/28/How-I-cut-G...
My blog on pointers in C: https://abblog.xyz/pointers-in-c/
00:00 Intro
01:42 scanf
03:28 sscanf
04:15 string in C
07:05 strlen
09:24 sscanf in glibc
11:30 __vsscanf in glibc
13:11 _IO_str_init_static_internal in glibc
13:55 __rawmemchr in glibc calls strlen
14:49 putting it all together
Website: https://abhattacharyea.dev
Blog: https://abblog.xyz
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