如何在没有超时的情况下解析大型CSV文件？

I'm trying to parse a 50 megabyte .csv file. The file itself is fine, but I'm trying to get past the massive timeout issues involved. Every is set upload wise, I can easily upload and re-open the file but after the browser timeout, I receive a 500 Internal error.I'm trying to parse a 50 megabyte .csv file. Th