服务器发送事件时，Three.js非常慢

i develop a game with Three.js which loads obj models from server depending on a stream from server sent event, all models are very simple and very low poly, the code runs well but with about 50 models loaded the event source makes it very very slow, i make the event source code inside a web worker which increased the performance but still not acceptable at all. what should i do to enhance the performance?i develop a game with Three.js which loads obj