Wifi repeater speed difference 2x faster slower with

Wifi repeater in middle make longer ping, slower reaction= slower can continue next packages, so slower speed.

:~$ speedtest
Retrieving speedtest.net configuration...
Testing from XXX (xxx.xxx.xxx.xxx)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by X (X) [0.38 km]: 12.613 ms
Testing download speed................................................................................
Download: 6.01 Mbit/s
Testing upload speed......................................................................................................
Upload: 2.48 Mbit/s



:~$ speedtest
Retrieving speedtest.net configuration...
Testing from XXX (xxx.xxx.xxx.xxx)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by X (X) [0.38 km]: 6.334 ms
Testing download speed................................................................................
Download: 14.25 Mbit/s
Testing upload speed......................................................................................................
Upload: 3.23 Mbit/s