--- a/src/dispatch_wgl.c 2022-08-04 17:45:13.144924705 +0200 +++ b/src/dispatch_wgl.c 2022-08-04 17:45:47.657482971 +0200 @@ -78,6 +78,8 @@ if (!first_context_current) { first_context_current = true; } else { + /* BLENDER: disable slow dispatch table switching. */ +#if 0 if (!already_switched_to_dispatch_table) { already_switched_to_dispatch_table = true; gl_switch_to_dispatch_table(); @@ -86,6 +88,7 @@ gl_init_dispatch_table(); wgl_init_dispatch_table(); +#endif } }