This is copy pasted from the #tuning channel of the autobrr discord

Tuning for 4.3.9-4.5.2 on 1gbps libtorrent 1.2

Speed

Unlimited on all, rate limit µTP and LAN

Connection

Peer connection protocol: TCP

Global max: off

Max num per torrent: off

Global max number upload slots: off

Max number of upload slots: off

Advanced

Interface: Bind your interface to prevent leaks

File Pool Size: 5000

Outstanding Mem: 128

Disk Cache: 1024 (or -1 if you feel ballsy, 0 if you experience memory leaks)

Disk cache expiry: 60

Disk IO Type: Default

Disk IO Read Mode: Enable OS Cache

Disk IO Write Mode: Enable OS Cache

Coalesce reads and writes: OFF

Use piece extent affinity: ON

Send Upload Piece Suggestions: ON

Send Buffer Watermark: 5120

Send Buffer Low Watermark: 512

Send buffer watermark factor: Between 200-250, adjust as needed

Outgoing connections per second: 50

Socket Backlog: 1000

Peer TOS: 128

utp-tcp mixed mode algo: Prefer TCP

Support IDN: ON

Allow Multiple Connections from the same IP address: ON

Validate HTTPS: OFF

SSRF Mitigation: ON

Upload Slots Behaviour: Fixed Slots

Upload choking alogrithm: Fastest Upload

Always announce to all tiers: ON

Max concurrent HTTP Announces: 50-75 (only increase if experiencing announce issues with very high amount of torrents loaded in client)

Peer turnover disconnect Percentage: 0

Peer turnover threshold percentage: 90

Peer turnover disconnect interval: 30

Max outstanding requests to a single peer: Leave as is

I personally left “Validate HTTPS” enabled since i haven’t researched what security risks might come from disabling https