Google and Microsoft Cheat on Slow-Start. Should You? 
This seems like deja-vu, I swear this was on HN before. (yeah probably without the m=1 on the url)Anyway, super easy to try on linux servers.First double check your existing setting    sysctl -a | grep tcp_slow_start_after_idle

then    sysctl -w net.ipv4.tcp_slow_start_after_idle=0

if you want to enhance to IW10 then first check the last line of    ip route show

should be something like    default via 1.2.3.4 dev eth0  

then copy it to the middle of this    ip route change default via 1.2.3.4 dev eth0 initcwnd 10


if you are using a VERY current linux kernel, you can also add initrwnd like so:    ip route change default via 1.2.3.4 dev eth0 initcwnd 10 initrwnd 10

Note the ip route change is not permanent unless you add it to something like /etc/rc.localYou should be able to see the change before/after in wireshark if you look very very carefully at the milliseconds before the first real ack.