guiyanakuang commented on a change in pull request #958: URL: https://github.com/apache/orc/pull/958#discussion_r742480546
########## File path: c++/src/LzoDecompressor.cc ########## @@ -312,13 +312,11 @@ namespace orc { output += SIZE_OF_INT; matchAddress += increment32; - *reinterpret_cast<int32_t*>(output) = - *reinterpret_cast<int32_t*>(matchAddress); + memcpy(output, matchAddress, SIZE_OF_INT); Review comment: > The combination of `reinterpret_cast` + `assignment` looks cheaper than `memcpy` function invocation. I'm wondering if we need to pay some performance penalty here. I'll do some performance tests later, `repeat_cast` + `assignment` makes direct use of registers, `memcpy` is usually used for larger copies of data, I'm not sure if it's lossy yet -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@orc.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org