Add some numbers for #2778

CHANGELOG.md

@@ -30,7 +30,15 @@ Special thanks to external contributors on this release:
 ### IMPROVEMENTS:
 
 - [docs] [\#3140](https://github.com/tendermint/tendermint/issues/3140) Formalize proposer election algorithm properties
-- [mempool] [\#2778](https://github.com/tendermint/tendermint/issues/2778) No longer send txs back to peers who sent it to you
+- [mempool] [\#2778](https://github.com/tendermint/tendermint/issues/2778) No longer send txs back to peers who sent it to you and limit to 65536 active peers.
+This vastly improves the the b bandwidth consumption of nodes. 
+E.g. 250bytes txs for 120 sec. at 500 txs/sec. rate, so total 15MB:
+  - total bytes received from 1st node in 4 node localnet
+     - before: 42793967 (43MB)
+     - after: 30003256 (30MB)                                                                         
+  - total bytes sent to 1st node in 4 node localnet
+     - before: 30569339 (30MB)
+     - after: 19304964 (19MB)  
 - [p2p] [\#3475](https://github.com/tendermint/tendermint/issues/3475) Simplify `GetSelectionWithBias` for addressbook
 - [rpc/lib/client] [\#3430](https://github.com/tendermint/tendermint/issues/3430) Disable compression for HTTP client to prevent GZIP-bomb DoS attacks (@guagualvcha)