Render performance tips



If you’re having lag (bad performance) then here you can find some tips that might improve it.
More tips will be added over time, feel free to share tips if you find something that helps improve performance.

Besides this guide you can also check out these player guides:

Recommended browser

For the best performance we recommended using Chrome
This guide is also mainly aimed towards the Chrome browser, however other browsers will have similar settings.

(ALL) Video settings

In the menu (bottom right cog) you can change your quality settings.
There are several settings that can be tweaked.
By default the quality is set automatically but if your game looks terrible or if you have bad performance the auto settings should be turned off to manually override the settings.


This is changes the overal rendering quality of the game.
This basically means the game gets scaled up or down as if you had a bigger or smaller screen.
Please note that the game will begin to look blurry if it’s less than 100%.
ULTRA: 200% HIGH: 100% MEDIUM: 75% LOW: 40%

Shadows, Particles, Anti-Aliasing

These settings can be turned on or off.
The amount of performance gain really defers per device and/or graphics card so just toggle them on/off and see if you get better performance or not. :wink:

Hardware Acceleration

Browsers some times turns this off, it’s really recommended to have this on to get way better performance.

Go to chrome://settings (type this in your address bar)
Then on the bottom select show advanced and search for System and ‘Use hardware acceleration’.
Make sure this is turned on.
If you go to chrome://gpu you can see if it’s enabled or not. (and there might be other issues shown here)

Log in as guest on your browser or a new user

By logging in as guest you will not have any extensions and/or plugins.
Not all browsers have this feature but if it does it’s recommended to use this.
It really depends on how many and which extensions you have enabled but it can drastically improve performance.

In the top bar click your user and select Guest.
Alternatively you can click Manage People and create a new user/person for CFP.

Play the game in incognito window

This is simular to the point above but if your browser has no user management this another way to get similar results.
By playing the game in incognito extension/plugins are disabled by default.
Extensions/plugins can really consume a lot of processing power some times.

(ALL) Play in windowed mode

By having a smaller window there is less pixels to render.
If you’re playing in windowed mode you can easily make the window smaller to reduce the screen size.
This can be used in combination with the quality settings so that you can make it not look blurry (HIGH) but still get good performance by playing in a smaller window.

(image,image) Monitor refresh rate

Make sure your monitor’s refresh rate is set as high as possible.
The rendering of the game uses this, so if it’s set to 30 Hz it will render the game at 30fps.
Guide for windows:
Guide for Mac: Go to System preferences- Monitor

(image+) Use dedicated graphics card

Often the browser uses the integrated graphics card instead of the dedicated graphics card.
This only applies if you have a dedicaed graphics card. (external GPU)
For Chrome you can write chrome://gpu in the address bar to see what GPU is used. (search for GL_RENDERER)


  • Open the control panel
  • Select Manage 3D settings in the menu.
  • Select Program Settings tab
  • In the program selection select your browser like Chrome or Firefox
  • In step 2 select High performance NVIDIA processor
  • Restart your browser and verify it’s now using your dedicated graphic card

(ALL) Update graphic card drivers

Please always make sure you have the latest drivers for your graphic card.

More to come…

Rawil's guide for a smoother game experience CF 2/3/Pro
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  • Added prefixes for browser/OS
  • Added hardware acceleration guide for Opera
  • Added login as guest guide for Chrome
  • Added guide to use dedicated graphics card for Windows and NVIDIA cards
  • Added recommended browsers

Cannot join any games

If you are using an NVIDIA GPU, go to NVIDIA Control Panel -> Manage 3D settings (as explained in the post above).

This is an important step that forces Chrome to render OpenGL (the game) using the dedicated graphics card.
With this change we fixed performance issues for multiple devices we tested on.


To check if your dedicated GPU is used go to chrome://gpu and search (CTRL+F) for GL_RENDERER, it should show the name of the dedicated graphics card:

closed #6

Curve Fever Pro Update Notes | 02-01-2019 | 1.5.3 | smaller gaps