Hi @rccardeployed !
To be able to login with WeChat, the plugin needs to communicate with WeChat API from time to time, and therefore depends on the latency of the communication between your server and Tencent’s servers form time to time (not all the time, caches are in place).
If you could direct me to which area, which case, or which request in particular is slow, I may be able to provide more help. In the meantime, I have tested the WP Weixin plugins with the amazing Query Monitor plugin, and have not noticed any slow query, slow third party call, or duplicate hook and query calls.
Please don’t hesitate to provide more concrete details and I’ll see what I can do to help!