You could expose the client's socket file descriptor and use splice(). This would avoid the memory copy from kernel space to user space - a likely cause of the system CPU time. (From some quick searching, here's the best description I could find: http://ogris.de/howtos/splice.html) --- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/20#issuecomment-18278815 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1