id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,launchpad_bug 392,pipeline upload segments to make upload faster,warner,warner,"In ticket #252 we decided to reduce the max segment size from 1MiB to 128KiB. But this caused in-colo upload speed to drop by at least 50%. We should see if we can pipeline two segments for upload, to get back the extra round-trip times that we lost with having more segments. It's also possible that some of the slowdown is just from the extra overhead of computing more hashes, but I suspect the turnaround time more than overhead. We need to do something similar for download too, since the download speed was reduced drastically by the segsize change too. ",enhancement,closed,major,1.5.0,code-performance,1.0.0,fixed,speed,,