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onProgress加载进度100后 差不多5s才会页面出现模型 加载模型到模型数据处理添加至场景 并切到页面显示模型总记花费时间 5276.869873046875 ms 加载模型耗时249ms 模型大小3.7M(不算浏览器缓存) 加载完成之后模型数据处理需要4986.869873046875 ms
