Use when profiling Roblox performance or diagnosing FPS, memory, network, mobile, or hot-path problems.

Roblox Performance When to Load Use when profiling, diagnosing lag, or setting performance budgets. For code level micro optimizations (pooling, throttling, relevance filtering, lazy loading) load roblox luau patterns ; this skill measures and tunes the engine. Quick Reference Profiling Tools MicroProfiler (Ctrl+F6) : Per frame breakdown: scripts, physics, rendering. Primary tool for finding what's slow. Developer Console (F9) : Stats tab: memory, network, render stats. Server Stats for server side metrics. Script Profiler (Ctrl+Alt+F5) : Per script CPU usage and heap allocations. Performance Targets Metric Starting target Investigate at Server heartbeat < 16ms 33ms Client FPS (desktop) 60 < 30 Client FPS (mobile) 45 < 30 Memory device specific sustained growth "Expensive" means the profiler shows it on a hot frame path (raycasts, clones, large finds, replication heavy writes). Throttle by judgment from measurements, not a universal number, and re measure after shipping: profile before and after on representative devices and confirm the targeted metric moved without regressions. Micro optimizations live in roblox luau patterns . Parallel Luau Use Actors only after profiling identifies isolatable CPU work. Workers compute; synchronize before restricted DataModel writes. SharedTable and mutexes add coordination cost; they do not replace ownership boundaries. Object Pooling Canonical pool code (token lease ownership): roblox luau patterns . StreamingEnabled Essentials On by default . Container scoped: only Workspace descendants stream. ModelStreamingBehavior = Improved streams non BasePart descendants with their parent Model; Legacy streams only BaseParts. Streamed out = parented to nil , not destroyed. Luau refs persist if it streams back. Config (Studio) : target defaults 1024, min 64; set StreamingIntegrityMode ; tune from data. Gotcha : FindFirstChild("DistantPart") returns nil if streamed out. Use WaitForChild with timeout. Mobile Profile geometry, textures, particles, UI, and shadows on low end devices. Full reference with code examples and API tables: [references/full.md](references/full.md)

roblox-performance