Projects Patreon Community Docs About

BeamNG Modding Docs

Guides

Reference

Debug Drawing GPU Mesh Structs ImGui FFI Math Structs (FFI)FFI C Definitions PID Controllers CSV Library Delay Line Deque Development Utilities Event Reference Extension System Signal Filters Graph Pathfinding UI Bridge Input Filter Constants 2D Bilinear Interpolation Introspection JBeam Pretty Printer JSON AST Parser SJSON Parser JSON Debug Parser JSON Pretty Printer K-D Tree (2D Boxes)K-D Tree (3D)K-D Tree (3D)Lua Serializer C++/Lua Binding Lua Core Lua Profiler Math Library Particles Quadtree Settings TCP Server Timer Scheduler Utility Library

extensions/ - BeamNG Extension Modules

ImGui Base API ImGui Custom Bindings ImGui Auto Bindings ImGui Context ImGui Widgets ImGui Wire Protocol ImGui Profiler

UI

Resources

BeamNG Game Engine Lua Cheat Sheet GE Developer Recipes MCP Server Setup

// RLS.STUDIOS=true

Premium Mods for BeamNG.drive. Career systems, custom vehicles, and immersive gameplay experiences.

Index

Home Projects Patreon

Socials

Discord Patreon (RLS)Patreon (Vehicles)

© 2026 RLS Studios. All rights reserved.

Modding since 2024

API Referencecommonextensionsui

ImGui Profiler

Module defined in `lua/common/extensions/ui/improfiler.lua`. ImGui-based LuaJIT profiler visualization - renders profiling data as an in-game overlay using ImGui.

Module defined in lua/common/extensions/ui/improfiler.lua. ImGui-based LuaJIT profiler visualization - renders profiling data as an in-game overlay using ImGui.

Exports

Functions

`M.onUpdate(dtReal, dtSim, dtRaw)`

Hook: Called each frame. Collects profiler samples and renders the profiler UI.

Parameters:
- dtReal - number - Real delta time
- dtSim - number - Simulation delta time
- dtRaw - number - Raw delta time

Hooks

onUpdate

Internal Notes

Built on jit.profile for low-overhead sampling
prof_cb - profiler callback, accumulates per-function sample counts
prof_top - sorts and displays top-N hottest functions
prof_annotate - overlays sample counts on source code
prof_start(mode) - starts profiling with given mode flags
prof_finish() - stops profiling and prepares results for display
Uses jit.vmdef (from libs/LuaJIT/vmdef) for VM state names
Similar to jit.p but renders results in ImGui instead of text output

See Also

ui/imgui Reference - Related reference
ui/imguiUtils Reference - Related reference
ui/imguiWire Reference - Related reference
Common Libraries Overview - Guide

ImGui Wire Protocol

Module defined in `lua/common/extensions/ui/imguiWire.lua`. ImGui wire protocol - serializes ImGui draw commands into a buffer for remote/deferred execution. Enables ImGui rendering across process bou

Flowgraph Lua Bindings

Module defined in `lua/common/extensions/ui/flowgraph/editor_api_luaintf.lua`. Lua bindings for the flowgraph node editor C++ API (`Engine.fge`). Provides ID types, enum constants, and editor control

On this page

Exports Functions M.onUpdate(dtReal, dtSim, dtRaw)Hooks Internal Notes See Also