FiveM Resmon and Profiler: A Practical Guide to Finding Script Bottlenecks

A slow interaction needs a repeatable investigation before it needs another optimization tip. Start by naming the symptom: a menu stutter on one player's PC, or a hitch reported by the server. Keep those observations separate.

This evergreen guide describes a diagnostic workflow. It does not report benchmark results or promise an FPS gain.

Prerequisites

Use a private test environment, access to the relevant console, and a repeatable action that triggers the problem. Keep a copy of the current resource before editing it. The official profiler guide calls for an updated client and server artifacts, plus Chrome for viewing captures. Cfx.re profiler guide.

Write a short test note first: which machine, which resource version, where the player stands, and which action to repeat. This makes a later comparison useful.

Find a candidate with resmon

In the client F8 console, run:

resmon true

The resource monitor reports CPU and memory usage per resource. Close it with resmon false. These are client observations, not a server-wide measurement. Official console commands.

Let initial loading settle, then repeat the problem action. Note which resource changes during the symptom. Treat that resource as a candidate for investigation rather than declaring it the cause from one reading.

If access is denied, consult the developer-command requirements in the same console reference. Use a development client for diagnosis; do not change production permissions merely to follow this checklist.

Capture the relevant execution

The profiler works on the client and server. Run the capture in the console corresponding to the problem:

profiler record 500
profiler status
profiler view

The official guide suggests 500 frames as a starting point. On a server, copy the supplied viewing link into Chrome. To save a capture, use profiler saveJSON filename.json. Capture and viewing instructions.

Capture while reproducing the action. Keep an untouched baseline capture and label the next one with the specific change you made.

Validate one change

Use this suggested review process:

1. Inspect the captured interval containing the symptom.
2. Identify the relevant resource, thread, or call path.
3. Make one focused change in the test environment.
4. Repeat the same action under comparable conditions.
5. Confirm that the interaction still behaves correctly.

Record an inconclusive result as inconclusive. If the original symptom does not occur during the capture, recreate it before drawing a conclusion.

Troubleshooting misleading comparisons

A quiet capture cannot explain an event that happened outside its recording window. A different test scene also makes before-and-after interpretation harder. Keep the location and action consistent, and note other changes you could not control.

The Cfx.re fact sheet points to profiling for resource execution problems and hitch investigation. It does not make a profiler capture a measurement of every performance subsystem. Performance fact sheet.

Investigate texture streaming, rendering, network behavior, and database work with evidence suited to each symptom. Keep the original captures so another developer can review your conclusion.