Skip to content

roblox-performance

Use when profiling or fixing Roblox performance: low FPS, lag, memory, network load, slow phones, hot paths.

1,951
installs
0 up / 0 down, score 0.00
votes
114
repo stars
Updated
less than a month ago
In the catalog since
6 Oct 2026
From
tabooharmony/roblox-brain
Other
Get it through your agent npx skills add tabooharmony/roblox-brain@roblox-performance

Skill instructions

Rendered from the published SKILL.md, 46 lines.

Roblox Performance

When to Load

Use for profiling and performance budgets. Pooling and lifecycle patterns: roblox-luau-patterns.

Quick Reference

Profiling Tools

  • MicroProfiler (Ctrl+F6): Frame breakdown of scripts, physics, rendering.
  • Developer Console (F9): Memory, network, rendering, and server stats.
  • Script Profiler (Ctrl+Alt+F5): Per-script CPU and heap.
  • Labels: debug.profilebegin/debug.profileend mark regions; debug.setmemorycategory labels memory. Gate instrumentation behind a flag.

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

Optimize measured hot paths, not folklore. Throttle from measurements; re-profile after shipping.

Parallel Luau

  • Use Actors only after profiling identifies isolatable CPU work.
  • Workers compute; synchronize before restricted DataModel writes.
  • Do not rely on shared module state across Actors. SendMessage copies data; SharedTable supports shared state and atomic updates.

Hot-loop cost model

  • Luau optimizes global imports; avoid folklore function hoisting/unrolling. Environment impurity can disable optimizations. Profile allocations as well as CPU; GC cost may occur later.

Object Pooling

Pre-clone and reuse. 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, shadows on low-end devices.

Full reference with code examples and API tables: references/full.md