Research for bug 695 revealed that the srzip output module adds one
ZIP member per received datafeed packet to the output file, which can be
as stupid as one logic-1-N file per byte in the input stream. This is
killing performance (slowdown orders of magnitude).
Received datafeed packets should get accumulated when they are small,
and output file content should be written in sensible chunks. This will
protect against inefficiencies in other input modules.