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1b1ed1a
(Get the code!)
Here is a short graphical comparison of before/after in the bionic SRU in a container. I modified the container's network bridge to add 300ms delay using
sudo tc qdisc add dev lxdbr0 root netem delay 300ms
which made things quite more visible on a slower 12 Mbit/s connection.
I could clearly see that _without_ the 1.6.6 SRU, speed dropped a lot after the first 100 (101?) packages were fetched, you could see in the progress that it fetched one file and then started fetching the next one.
In contrast, with the SRU installed, progress sometimes shows lines with multiple files very quickly; i.e. it drains the entire pipe of 10 items in what feels like one update of the progress output.
You can also see this in the pictures: In the old graph, network speed has a sudden drop in the middle; in the second picture (which was running a bit longer, so it starts more on the left), you see that performance can be sustained.