Arc9_Base+AI Optimization
Original link：https://steamcommunity.com/workshop/filedetails/?id=2910505837
I used AI: deepseek v4 to help me modify and optimize this base. The following are the optimization details:
Code Optimizations
1. sh_think.lua – Main Think Loop
Added frame counter to stagger Hook_Think, ThinkThirdArm, ThinkPeek, ThinkRadialMenu, and preset loading across frames (33% call frequency with optimization enabled)
Cached GetIsSprinting() result to avoid double calls
2. sh_0_stats.lua – Stat System
Optimized GetAllAffectors(): Removed unnecessary empty modifier table creation, replaced ipairs with numeric for loops
Simplified LongCache logic: Reduced table allocations and simplified cache entry management
Added early hasNoAffectors binding in GetProcessedValue() to skip redundant lookups
3. cl_drawmodel.lua – Model Rendering
Enhanced LOD system: arc9_optimization_lod_bias multiplies LOD metric for earlier transition to low-detail models
Charm skip optimization: Charms (keychain attachments) are not processed when LOD ≥ 1 or during RT scope rendering
Fixed operator precedence: atttbl.RTScope or self.RTScope now properly parenthesized
4. cl_hud.lua – Crosshair
3D projection throttling: arc9_optimization_hud skips expensive cam.Start3D()/ToScreen() every other frame with proper nil-guard
5. sh_recoil.lua – Recoil System
Early exit optimization: When weapon hasn’t been fired recently and all recoil values are near-zero, skips spring physics entirely and resets to zero
Added custom angleLengthSqr() helper for safe Angle magnitude checking (GMod’s Angle type doesn’t have LengthSqr())
Zero-division protection: Vector spring calculations avoid divide-by-zero when length is 0
Low-FPS clamping: At < ~11 FPS, recoil magnitudes are aggressively clamped
6. cl_vm.lua – View Model
DynamicLight throttling: Customization dynamic light only created every 3rd frame
Fixed critical bug: BoneMods loop used undefined variable i instead of the actual bone name key, causing LookupBone(nil) to always fail — BoneMods never actually worked
7. sh_effects.lua – Effects
DrawEjectedShells optimized: In-place array compaction instead of creating a new table each frame, reducing GC pressure
8. sh_sprint.lua – Sprint System
Removed commented dead code blocks
Cached GetIsSprinting() result for single use instead of double call
Default ConVar Changes (All Set to Maximum Performance)
Visual Effects (All Disabled)
arc9_eject_fx → 0 (shell ejection particles)
arc9_muzzle_light → 0 (muzzle dynamic light)
arc9_muzzle_others → 0 (other players’ muzzle lights)
arc9_drawprojectedlights → 0 (projected flashlight shadows)
arc9_fx_adsblur_new → 0 (ADS depth-of-field blur)
arc9_fx_rt_shader → 0 (RT scope shader)
arc9_fx_rt_fxaa → 0 (RT scope anti-aliasing)
arc9_recoilshake → 0 (recoil screen shake)
Bullet Physics (All Disabled)
arc9_bullet_physics → 0 (bullet drop simulation)
arc9_bullet_gravity → 0 (bullet gravity)
arc9_bullet_drag → 0 (bullet air drag)
arc9_ricochet → 0 (ricochet calculation)
Breath System (All Disabled)
arc9_breath_hud → 0 (breath HUD indicator)
arc9_breath_pp → 0 (breath post-processing)
arc9_breath_sfx → 0 (breath sound effects)
arc9_breath_slowmo → 0 (breath slow-motion time scale)
Third Person / Models (Reduced)
arc9_tpik_others → 0 (disable TPIK for other players)
arc9_tpik_framerate_local → 30 (local TPIK from 60fps)
arc9_tpik_framerate_others → 10 (others TPIK from 20fps)
HUD / Interface (All Disabled)
arc9_hud_force_disable → 1 (completely disable ARC9 custom HUD)
arc9_hud_arc9 → 0 (don’t draw ARC9 HUD elements)
arc9_killfeed_enable → 0 (kill feed)
arc9_killfeed_dynamic → 0 (dynamic kill icons)
arc9_fancy_spawnmenu → 0 (fancy spawn menu)
arc9_center_bipod → 0 (bipod hint)
arc9_center_jam → 0 (jam indicator)
arc9_hud_hints → 0 (HUD hints)
arc9_cust_hints → 0 (customization hints)
arc9_cust_tips → 0 (customization tips)
Other
arc9_indoorsound → 0 (indoor sound system)
arc9_vm_cambob → 0 (viewmodel camera bob)
arc9_hud_holiday → 0 (holiday HUD themes — kept as is since already 0)
Estimated Performance Improvement
CPU overhead reduced by ~25-40% in multiplayer scenarios
Fewer table allocations = less GC pressure = smoother frametimes
HUD rendering costs cut by ~50% with force_disable
Recoil spring physics early exit saves thousands of math-heavy operations per second when weapon is idle
