What is FiveM development and what does a FiveM developer do?

FiveM extends Grand Theft Auto V into a moddable multiplayer framework. A FiveM developer writes Lua for CitizenFX, builds NUI in HTML or React, connects MySQL via oxmysql, integrates ESX or QBCore (or custom frameworks), and optimizes for OneSync population, entity limits, and server tick performance.

Do you work with ESX, QBCore, Qbox, and ox_lib on FiveM servers?

Yes. PiTyUs ships features across ESX Legacy-style economies, QBCore and Qbox stacks, ox_lib notifications and input dialogs, ox_inventory patterns where needed, and fully custom frameworks when design goals go beyond off-the-shelf templates.

Can you build NUI (in-game browsers) for FiveM?

NUI is a core specialty: React, Vue, or Vite-built panels, shops, MDTs, crafting UIs, and admin tools with accessible markup, responsive layouts, and tight Lua↔JS bridges using NUI callbacks and message contracts.

How do you approach FiveM server performance and OneSync?

Profiling-first: reducing redundant events, batching state updates, respecting entity and player bucket rules, tuning population zones, and validating database queries. The goal is stable frame time for clients and predictable server ms under peak concurrent players.

Do you offer website and landing page work for FiveM brands?

Yes. Next.js and modern static sites for server brands, waitlist pages, rules and lore sites, and documentation hubs—SEO-oriented structure, fast Core Web Vitals, and design systems that match in-game identity.

What is CitizenFX scripting and how does it relate to FiveM?

CitizenFX is the runtime behind FiveM. Scripts use Lua with FiveM natives for entities, players, and world state. Resources are packaged with fxmanifest.lua, loaded by the server, and coordinated with client and server contexts.

How much does a custom FiveM script cost?

Pricing is scope-based rather than fixed. A small standalone resource is very different from a multi-job economy, a full NUI inventory, or an ESX-to-QBCore migration. Share the framework, the feature list, and the deadline, and you get a clear estimate with milestones before any work starts—no surprise scope creep.

Can you fix, optimize, or refactor an existing FiveM server?

Yes—server audits and refactors are a core service. That includes OneSync and server-tick profiling, removing redundant events and net traffic, fixing resource conflicts, hardening exploitable handlers, cleaning up oxmysql queries, and upgrading aging ESX or QBCore stacks without breaking live gameplay for your players.

Should I use ESX or QBCore for my GTA V roleplay server?

Both are solid—the right choice depends on your resource library, your team's familiarity, and how much custom work you plan. QBCore and Qbox ship a more modern core and tooling out of the box; ESX Legacy has a huge ecosystem and battle-tested scripts. PiTyUs builds on all of them, and on fully custom frameworks when off-the-shelf templates limit your design.

Can you convert or bridge scripts between ESX, QBCore, and Qbox?

Yes. Framework conversions and bridges are common work: porting jobs, inventories, and economies between ESX and QBCore/Qbox, wiring ox_lib and ox_inventory compatibility layers, and keeping shared exports stable so the rest of your server keeps working during the migration.

Do you build custom FiveM HUDs, phones, and inventory UIs?

NUI is a specialty. Custom HUDs, phone apps, inventories, crafting tablets, police MDTs, and admin panels in React, Vue, or vanilla CEF—responsive, accessible, and tuned for 1080p in-game rendering with tight Lua↔JS callback contracts and optimistic UI where it helps.

How can I contact PiTyUs for a FiveM commission?

Join the PiTyUs Discord at https://discord.gg/64a26MK4jZ, open a support ticket there, or send a direct message to the user pityus on Discord. Describe your scope, framework (ESX, QBCore, or custom), timeline, and whether you need NUI, database work, or full-stack delivery. This site does not list a public email or GitHub for inquiries.

What is CRM Development (crmfivem.dev) and how is PiTyUs involved?

CRM Development is an affiliated FiveM platform at https://crmfivem.dev/ offering server-oriented packages, custom scripts, and ESX/QBCore ecosystem resources, with secure role-based access and a cohesive design system. PiTyUs leads the product UI and front-end engineering; the live site credits PiTyUs in the footer as the design partner.

Engineering

resmon: finding the resource that is eating your frames

How to use the FiveM resource monitor (resmon): opening it in F8, what CPU msec, time % and memory mean, what good numbers look like, how to find a bad resource, and what to fix once you have found it.

Updated 11 Sept 202611 min readBy PiTyUs · FiveM developer

Overview

When players say the server “lags”, they usually mean their frame rate drops — and on the client that is very often one or two resources doing too much work every frame. The resource monitor, resmon, shows exactly how much time each resource takes. Learning to read it turns vague complaints into a specific file you can fix.

Opening resmon

Join the server and press F8 to open the client console.
Type resmon 1 and press Enter. The monitor appears over the game.
Close the console with F8; the monitor stays until you run resmon 0.

What the columns mean

Column	Meaning
Resource	The resource name
CPU msec	Script time per frame, averaged — the number that matters most
Time %	Share of total frame time
Memory	Script memory used by the resource’s runtime
Streaming	Memory used by assets the resource streams

Remember the budget: at 60 fps a frame is 16.7 ms for everything — rendering, physics and every script. A resource using 2 ms is taking an eighth of the entire frame on its own.

What good numbers look like

CPU msec (idle)	Verdict
0.00 – 0.02	Excellent — the resource sleeps when it has nothing to do
0.03 – 0.10	Fine for UI-heavy resources such as a HUD
0.10 – 0.50	Worth checking; often a loop that could sleep longer
> 0.50 constantly	A problem — look at its loops now

Rules of thumb for idle numbers on a typical client; spikes during actions are normal.

01Finding the culprit

Stand somewhere neutral and note the baseline: everything should be near zero.
Reproduce the lag — drive through the city, open the phone, stand near the job center.
Watch which resource’s CPU msec rises and stays up.
Stop that resource (stop name in the server console, on a test server) and confirm the frame rate recovers.
Open its client files and look for Wait(0) loops that do work regardless of distance.

The server side

resmon measures the client. Server-side cost shows up as “server thread hitch” warnings and is measured with the server profiler and txAdmin’s performance charts — see the profiler guide.

Frequently asked questions

How do I open resmon in FiveM?

Press F8 and type resmon 1. Type resmon 0 to close it.

What is a good resmon value?

Idle resources should use about 0.00–0.02 ms. Constant values above roughly 0.5 ms point to a problem.

Does resmon show server performance?

No, it shows the client. Use the server profiler and txAdmin for server-side performance.

Why is my HUD using 0.1 ms?

HUDs update often, so a little is normal. If it is much higher, it probably updates every frame when it only needs to update a few times a second.

Need this built, not just explained?

Ten years of FiveM work, from Lua to NUI

Custom resources, React NUI, ESX / QBCore / Qbox integration, OneSync performance audits and security reviews — plus the websites and SEO around your server brand.

Talk on Discord See services

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