南城

paddle ocr 在cpu环境推理时内存不回收 一直增长oom

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### 🔎 Search before asking - [x] I have searched the PaddleOCR [Docs](https://paddlepaddle.github.io/PaddleOCR/) and found no similar bug report. - [x] I have searched the PaddleOCR [Issues](https://github.com/PaddlePaddle/PaddleOCR/issues) and found no...

偶然报错Input type (float) and bias type (c10::Half) should be the same ， 无法复现， 发现错误日志后再次用原数据请求却正常返回