Hi, our team uses `EntityUtils.toByteArray` method in `org.apache.httpcomponents:httpcore:4.4.15` to implement HTTP client to download a file.
We found that file download gets very slow when downloading a file of ~1.7 GB. Based on our investigation, the performance of copying the response to a byte array is significantly deteriorated in the case of large file download. And, we also found that this perfomance problem is improved by using Java's `InputStream.readAllBytes` instead. You can find the details of our investigation with benchmarks in the following repository. * https://github.com/deftfitf/httpcomponent-entitiyutils-benchmarks Based on this content, I believe that there is a room of improvement regarding the performance of `EntityUtils.toByteArray`. Best regards, Junya Ishida
