Use the profiler to find slow scripts
FiveM ships with a built-in profiler that shows exactly which lines of code are eating CPU time. It uses the same profiler record console command on both client (F8) and server. This lesson teaches you to capture a trace, open it in Chrome's built-in viewer, and read the flame graph so you stop guessing and start measuring.
Build it
Record a profile
Join your server and open F8. To profile the client, run the record command with a frame count. It records that many frames and stops on its own:
profiler record 500
While it records, check progress at any time:
profiler status
Server-side profiling uses the SAME command. Run profiler record 500 in the server console (txAdmin Live Console or the FXServer window) instead of F8. There is no separate txAdmin profiler UI. The console command is the tool on both sides.