Surge 5 4+

Smart Group

This is a new type of policy group, driven by our carefully designed algorithm engine, which can automatically select the appropriate policy from the sub-policies of this policy group. The goal of the Smart policy group is to replace the original automatic testing groups (url/load-balance/fallback), greatly optimizing the experience while minimizing the need for manual intervention in policy groups. Users only need to put the available policies into this group.

For details, see: https://kb.nssurge.com/surge-knowledge-base/guidelines/smart-group

Rule System
- Overall performance optimization of the rule system.
- Significant optimization of the indexing algorithm in large domain rule sets, improving the search efficiency by more than ten times for rule sets with more than 100,000 rules.
- Corrected the issue where sub-rules of logical rules within a rule set could not be covered by the `no-resolve` and `extended-matching` parameters of the rule set.
- Added a new rule type `DOMAIN-WILDCARD`, supporting `?` and `*` domain name matching.
- `DOMAIN-SET` and `RULE-SET` are changed to strict validation. If there are invalid lines in the file, the entire rule set will be invalidated to avoid problems caused by misuse.

IPv6
- The behavior of the `ipv6-vif` parameter has been modified. When set to always, IPv6 functionality will be enabled even if `ipv6=true` is not set.
- Added a warning for the `ipv6-vif=always` parameter.
- Adjusted the automatic retry mechanism. Accessing IPv6 addresses in a non-IPv6 network will no longer enter the retry process, and the request will fail immediately (solving the problem of some applications stalling when IPv6 VIF is enabled in a non-IPv6 environment, but the application will still continue to send IPv6 requests).

Other Optimizations
- Enhanced `$notification.post`, adding support for media resources, sound hints, and automatic dismissal.
- Optimized WireGuard failure handling.
- Reduced the power consumption of the TUIC protocol during sleep.
- Improved the precision of time statistics in the request log system, now accurate to µs level.
- Optimized various abnormal retry mechanisms, avoiding high resource usage caused by continuous retry in the face of some specific problems. For operations that need to be retried continuously (such as WireGuard reconnection, Ponte server reporting to iCloud), Surge will now retry after 0.1s, 0.5s, 1s, 5s, 10s, 30s after an error.
- Optimized the caching system for external resources.
- Added the profile line modifier `#!REQUIREMENT`.
- When the current network is found to be managed by Surge Mac Gateway, Surge iOS will now automatically pause. (This can be adjusted via the auto-suspend option, enabled by default.)
- Optimized TUN takeover and specific app performance compatibility issues.
- Optimized memory usage, infrequently used and large scripts will not be cached in memory anymore.
- The network diagnostics page adds SSID/BSSID with copy functionality.
- Now, when uploading logs in the log interface, the engine currently running will automatically generate the most recent verbose logs (the new version has cached 256KB of logs in memory), so when reporting problems, you can upload directly without needing to reproduce in verbose mode.
- For external resources related to policy groups and script types, the maximum size is now limited to 2MB, to avoid memory overflow in case of configuration errors.

Check the knowledge base for complete release note.