Saved locally
Luczystrap accepted and persisted the key/value state for the next Roblox launch.
File evidenceFastFlag test protocol · one variable
Test one flag. Distrust one lucky run.
A saved FastFlag is not a measured result. Hold the Roblox scene and settings constant, alternate the original and candidate values, record the same metric three times per state, then prove the rollback.
This page provides a protocol, not benchmark claims. Luczystrap has not supplied owner-verified F1/F2 results for this key, device, and experience, so no universal FPS gain is published here.
01 / Proof ladder
Saved, allowed, visible, repeatable are different claims.
Move through these boundaries in order. If one fails, stop there. Adding more flags cannot repair missing evidence for the current one.
Eligible for recognition
The exact key appears on Roblox's current local FastFlag allowlist. A typo or absent name is ignored.
Policy evidenceObservable
The expected visual or performance difference appears in the chosen scene after a complete restart.
Test evidenceRepeatable and reversible
The result returns across candidate runs and the original behavior returns after rollback.
Useful evidence02 / Preflight lock
Do not begin until the comparison has an identity.
These six facts define the experiment. The checklist stays in this browser tab and does not change Luczystrap, Roblox, or your files.
03 / Alternating protocol
Make the flag cross the same boundary six times.
A/B/A/B/A/B costs more time than one before/after screenshot. It also makes server drift, warm-up, and one unusually good run easier to see.
Write the experiment card
Record the exact key, original value, candidate value, expected effect, Luczystrap version, Roblox channel/version if visible, device, display settings, experience, scene, route, warm-up duration, measurement duration, and metric. Check the key in the current allowlist.
Capture the first original run
Keep the original value or no local override. Fully launch Roblox, return to the fixed scene, wait the declared warm-up, repeat the route, and record the chosen metric plus visual defects, stutters, crashes, and ping context.
Change only the selected key
Close Roblox completely. In the FastFlag Editor, change one value, save, relaunch, and repeat the same scene and timing. Do not add a preset, pack, mod, or Windows tweak between runs.
Prove the result can leave and return
Restore the original state, save, fully relaunch, and collect A2. Then reapply the same candidate value and collect B2. If the supposed effect stays during A2, the flag is not yet an adequate explanation.
Repeat without rescuing the outcome
Collect the final original and candidate pair with the same rules. Do not extend a weak run, change servers selectively, discard a stutter, or alter graphics until the number looks favorable. Record deviations instead.
Compare medians, ranges, and non-number costs
Use the calculator below for the same metric across all six runs. Then inspect image quality, responsiveness, stability, thermal behavior, memory, and artifacts. A faster median with unacceptable corruption is not automatically a useful result.
Finish on the known baseline
Restore the original value or delete only the new entry, save, fully relaunch, and repeat the scene once more. Keep the dated backup until the baseline behavior returns. Use the reset workflow if the prior state is unknown.
Do not turn an absent allowlist key into a bypass experiment. A locally saved value outside Roblox's current allowlist is ignored by the ordinary Player configuration path. This guide does not use IXP, memory modification, or another method to force unsupported keys.
04 / Measurement
Frame time exposes what average FPS can hide.
Roblox documents both client Performance Stats and MicroProfiler. Use the client rather than Studio for player-side numbers, and keep the same tool and view across all runs.
Use the lightest tool that answers the question.
Performance Stats in the Roblox client exposes FPS, memory, and ping and is enough for a basic repeated comparison. Roblox's current performance documentation also lists Shift+F5 for a debug stats summary; shortcuts can vary by interface and should not replace the visible settings route.
MicroProfiler is the advanced option when the question is frame-time consistency or a spike. Roblox describes its bar graph as per-frame timing and can save a short HTML dump into %LOCALAPPDATA%\Roblox\logs on Windows.
- Primary numberFPS or frame time; never switch units between runs.
- ConsistencyRange, spikes, stutters, and whether one run is an outlier.
- ContextPing, server identity when available, player count, and unusual background load.
- Trade-offImage quality, pop-in, readability, latency feel, heat, and stability.
| Frame time | Equivalent FPS | Interpretation |
|---|---|---|
| 33.33 ms | 30 FPS | Each frame uses about one thirtieth of a second. |
| 16.67 ms | 60 FPS | A common 60 FPS frame-time target. |
| 8.33 ms | 120 FPS | Half the frame time of 60 FPS. |
| 4.17 ms | 240 FPS | One quarter of the 60 FPS frame time. |
Formula: FPS = 1,000 ÷ frame time in milliseconds. Roblox warns that a high average FPS can still feel bad when individual frame times spike, so preserve consistency evidence.
05 / Local A/B notebook
Compare the runs without selecting a favorite.
Enter all six values from the alternating sequence. The calculator reports medians and whether the observed ranges overlap. It runs only in this tab and does not claim statistical significance.
Six-run comparison
A is the original state. B is the one-key candidate. Use one unit for every input and keep visual, stability, and context notes separately.
Original median—
Candidate median—
Candidate change—
What these six values sayWaiting for six runs.
Complete A1, B1, A2, B2, A3, and B3 with positive values.
Lower frame time is better. Range overlap is descriptive, not a confidence test.
06 / Placebo control
Name the other explanation before naming the flag.
A result can be real and still belong to the server, scene, temperature, cap, or measurement process. Record these boundaries instead of editing around them.
| Confounder | How it creates a false result | Control or record |
|---|---|---|
| Different scene or camera | Geometry, lighting, effects, avatars, and visibility change the rendering load. | Use landmarks: same start point, direction, route, and camera position. |
| Different server conditions | Region, player count, server compute, and network path can change responsiveness and ping. | Rejoin the same server when practical; otherwise record the difference and do not merge incomparable runs. |
| Warm-up and asset loading | The first minute can include streaming, compilation, downloads, and cache activity absent from later runs. | Declare one warm-up duration and begin every measurement at the same event. |
| FPS cap or VSync | A cap can make different frame times display the same FPS ceiling. | Record the cap and display mode; keep both unchanged and use frame time when the ceiling hides headroom. |
| Thermal or background load | Heat, battery mode, recording, browser tabs, updates, and overlays can move later runs. | Keep power and background state fixed; alternate A and B so time does not favor only one state. |
| Expectation and selective logging | Knowing which state “should win” encourages choosing a flattering window or forgetting bad runs. | Write the expected effect first and retain all six measurements and exceptions. |
| Another configuration layer | Presets, mods, IXP, GlobalBasicSettings, plugins, and Windows tweaks can change the same outcome. | Freeze every other layer. Do not attribute their combined state to one FastFlag. |
07 / Decision
Keep, repeat, or undo—with a written reason.
The calculator is only one input. The final decision also includes the expected effect, image quality, stability, responsiveness, and confirmed return to baseline.
The effect repeats and the cost is acceptable.
Keep the one-key change only for the tested environment and document the boundary.
- B improves the declared outcome across repeated runs.
- A restores the baseline behavior.
- No unacceptable visual, stability, or responsiveness regression appears.
The ranges overlap or conditions changed.
Do not call a winner when the session variation is as large as the apparent effect.
- One outlier drives the median.
- Server, scene, cap, warm-up, or background load changed.
- The visual expectation was not defined before the run.
The result regresses, breaks, or cannot be explained.
Restore one original value, save, fully relaunch, and prove the baseline returns.
- Candidate performance is consistently worse.
- Artifacts, crashes, unreadable UI, or instability appear.
- The key is absent from Roblox's current allowlist.
08 / FAQ
Testing one FastFlag.
Direct answers for scope, metrics, repetition, server variation, visual outcomes, ping, and rollback.
Test one exact key and one candidate value at a time. If several keys change together, the result cannot identify which key caused the difference or interaction.
No. Saving proves that Luczystrap persisted local configuration. Roblox separately decides whether the key is recognized, and a controlled in-game comparison is still required to establish an observable effect.
Use the same metric in every run. FPS is accessible through Roblox performance statistics, while frame time makes spikes and consistency easier to inspect. Roblox documents that 1,000 divided by frame time in milliseconds equals FPS.
Repeated alternating runs reveal whether one unusually good or bad session is driving the apparent result. Three runs are a practical minimum for this protocol, not proof of universal statistical significance.
You can, but do not combine those measurements into one comparison. Experience scripts, assets, lighting, physics, server load, and scenes differ, so each experience needs its own baseline and result.
No. Ping is strongly affected by the network path and server conditions. Record it to detect an unequal test environment, but do not attribute a ping change to a rendering key without separate evidence.
That can still be a useful visual result if it repeats and has no unacceptable stability or responsiveness cost. Define the expected outcome before testing instead of treating maximum FPS as the only success condition.
Restore the recorded original value or delete only the new test entry, save, fully relaunch Roblox, and repeat the baseline scene. Use the dated JSON backup or complete reset guide if the prior state is unknown.
09 / Continue by boundary
Keep the next click inside the same problem.
Use the exact page for key eligibility, editing, rollback, or the wider graphics controls. Do not import another pack to resolve an inconclusive test.
Before the test
Check the exact key
Search the dated local allowlist and open Roblox's live policy source.
Open allowlist →Change one rowUse the editor
Export, search, add or edit, save, relaunch, and preserve the old value.
Open editor guide →Need rollbackReturn to baseline
Remove one key, reset one category, or clear the complete local set deliberately.
Open reset workflow →Test a controlGraphics settings
Separate FastFlags, global settings, render controls, and their visible trade-offs.
Open graphics overview →10 / Evidence record
The method separates policy from measurement.
Roblox defines local key eligibility and documents its client measurement tools. Luczystrap provides the visible edit, save, export, and rollback workflow. This page publishes no owner benchmark that has not been run.
Roblox · official policyAllowlist for local client configuration
Establishes the current recognition gate and ignored-key boundary.
Open policy →Roblox Creator Hub · official documentationIdentify performance issuesClient FPS, Performance Stats, MicroProfiler, frame-time and ping context.
Open documentation →Roblox Creator Hub · official documentationMicroProfiler and frame-time evidencePer-frame timing, consistency, FPS conversion, captures, and Windows dump path.
Open documentation →Luczystrap · official repositoryFastFlag management and project boundaryOfficial product record and current public-source limitation.
Open repository →Visual transcript · January 2026Luczystrap 1.4.9 editor workflowCurrent UI orientation for editing, saving, and launching; not benchmark evidence.
Open video →Luczystrap · owned documentationVerified rollback boundarySmallest-scope reset, full relaunch, and baseline confirmation.
Open reset guide →Method limitation: three runs per state are a practical user protocol, not a formal sample-size guarantee. Device, experience, client update, server, scene, temperature, and measurement tool limit generalization. Publish a performance claim only with the complete raw record, tested versions, hardware, scene, protocol, negative results, and repeatable rollback.