Want to make your FiveM server faster without a massive overhaul? Here are 15 quick optimization wins — practical things you can check and fix today to reduce lag and improve performance. Work through them in order.
1. Run resmon and find the worst offenders
Open resmon (F8 → resmon 1) and sort by CPU time. The scripts sitting high while idle are your biggest wins. Start here — it tells you where to focus everything else.
2. Remove scripts you don't use
Every running resource costs something. Go through your ensure list and stop anything you're not actually using. Free performance for zero effort.
3. Fix or replace the top idle offender
That one script eating 3ms while idle? Replacing or fixing it often solves the majority of your lag in a single move. One bloated script can dominate everything.
4. Confirm OneSync is set correctly
Make sure OneSync is on and appropriate for your player count.
5. Right-size sv_maxclients
Don't set it wildly above your real population. Match it to reality.
6. Reduce NPC/vehicle density
Ambient population is a constant cost. If you don't need packed traffic, dial density down for a real performance gain.
7. Audit your streamed content
Too many or bloated streamed assets cause stutter and texture loss. Remove unused vehicles and MLOs.
8. Check for duplicate systems
Running two inventories or two target systems wastes resources and causes conflicts. Keep one of each.
9. Update your artifacts (carefully)
Old server builds can cost performance. Update to a recommended version — after backing up.
10. Use the profiler for server-side lag
Some lag hides from resmon. Use the server console profiler to catch database-heavy or server-side hotspots.
11. Check your database health
A slow or overloaded database causes lag resmon won't show. Verify your oxmysql setup and look for query-heavy scripts.
12. Prefer ox-stack scripts
Resources built on the ox stack with event-driven logic generally outperform old frame-by-frame scripts.
13. Move off underpowered hosting
If you've optimized and still lag, your single-thread CPU may be the bottleneck. Better per-core performance transforms a server.
14. Test under real load
Optimize based on how the server behaves *busy*, not empty. Watch resmon and profiler during peak times.
15. Add new scripts deliberately
Going forward, test every new script's cost before committing. Prevention beats cleanup — this keeps your gains permanent.
The 80/20 of FiveM performance
Realistically, wins #1–3 (find and fix the worst idle scripts) solve most lag for most servers. The rest are valuable refinements. The overarching lesson: your scripts are almost always the answer, and one or two bad ones usually cause the bulk of your problems.
Build on scripts that don't cost you
The easiest optimization is installing scripts that are light to begin with. At Viper Development, our scripts sit at near-zero idle resmon — so they add features without becoming items on this fix-it list. Browse our optimized scripts →, and see our full optimization checklist for the deep version.