From the EQ2 Forums:
We don’t want to get into too much detail, but overall we updated some very old libraries to bring EQII up to date. We also updated memory management, fixed some memory leaks as a result, and made some other code changes that look to be improving server performance.
Here’re a few notes to give you a bit more detail:
- Improved client performance on maximum settings. Additionally, altered the “Extreme Quality” defaults to look and run better on higher end machines. This means that non-raiders who do quests, decorate houses, heroic dungeons (without oceans of proc gear), are going to notice considerable improvement.
- We have made several improvements to spawning of items and NPCs to make this less of a load on the server.
- We have made some optimizations to how data is sent from the server to the client.
- Optimized some server side AA calculations.
- Several Marketplace improvements on performance and improved how the welcome window is sent to clients.
- Made improvements to how the server calculates stats during combat.
- Made improvements to client for performance.
- Utilized SSE and SSE2 instruction sets to improve graphical performance.
Things that are NOT specifically improved:
- Client performance on lowest settings, it is already stripped down to the bare minimum.
- Clients who are using custom UIs, specifically ones using UI script.
- Raid performance still needs some attention, specifically stacking procs and double casts. We’re still looking into solutions.