Mural speed when sharing screen on WebEx

Hi there, I have noticed that when I have more than 10 people on a Webex call with Mural as a shared screen - the speed of Mural slows down significantly - has anyone else experienced anything like this and any recommendations?


  • aribental
    aribental Mural Team mod

    Hi Lani :)

    You are always able to stop sharing a screen and or only invite in necessary members into the MURAL as you are presenting.

    But here are some MURAL best practices:

    Technical impacts on performance

    1. Recommended browsers

    You can find details of the technical requirements to run MURAL here. Besides our native apps, which can be downloaded on iPads, iPhones, Android phones, and tablets, MURAL runs best on Google Chrome, Firefox, Microsoft Edge, and Brave. We tend to see higher lag times with Safari.

    2. Internet connection

    Your internet connection speed also plays a role in success with MURAL. Your experience in collaboration sessions will be different with an internet connection speed of 100Mbps vs. 5Mbps. This is especially important if your murals have a large number of objects (images, embedded documents, sticky notes, shapes, etc) or images with large file sizes.

    3. Older computers

    MURAL is a tool for visual collaboration and relies on displaying and updating graphics on a constant basis for smooth movements on the mural canvas. We measure these updates in Frames Per Second (FPS). Typically, older computers will have lower FPS performance, whereas newer computers will have higher FPS and provide a smoother experience.

    4. VPNs and corporate networks

    If you are accessing MURAL from within a corporate network or VPN, your IT department may need to have MURAL allowlisted to prevent firewalls from blocking your access. With any VPN, your internet connection is most likely passing through a series of security measures, which can sometimes impact your experience with using MURAL.

    Tips to maximize performance in MURAL

    Recognizing that it can be hard to control for internet speeds or computing power with a group of collaborators, we want to provide recommendations for ensuring the best performance during your collaborative sessions.

    1. Number of participants per session

    MURAL can handle hundreds of concurrent collaborators. We generally recommend that you keep collaborative sessions to around 100 concurrent collaborators. Beyond 100 concurrent collaborators, you’re more likely to see performance lag or slow-downs. This lag isn’t usually prohibitive, but can be frustrating! However, we regularly see collaborative sessions with over 500 people without significant performance issues. If you have less than 100 people and are seeing performance issues, we recommend you try implementing some of the tips below.

    2. Limit concurrent actions in larger groups

    Generally, actions taken at the same time by collaborators can impact performance for any application that offers real-time collaboration. For example, if 200 people are trying to add a sticky note at the same time, you’re more likely to see a slow down in performance than if 20 collaborators are trying to add a sticky note. As you plan a meeting or workshop, you may want to consider ways to split up concurrent actions taken into smaller groups.

    3. Limit drawing to sticky notes with larger groups

    Another contributing factor to MURAL lag time is multiple users using the drawing feature at the same time. When 20+ participants are drawing at once, there is a higher chance of delays. We recommend using the drawing feature with smaller groups than 20 for best results or using the drawing feature inside sticky notes, instead of straight on the mural.

    4. Have collaborators only add images one by one

    Adding multiple objects at once can also affect performance, as can duplicating lots of objects at once. Instead, we recommend adding and duplicating objects one at a time while collaborating with larger groups.

    5. Upload backgrounds to your murals.

    If you're going to lock most of your content within a mural while running a session with a lot of people, we’ve got a quick fix! Add the content to a different mural, then export that mural as a PNG. Once the image of the mural is ready, upload it to your original mural as a background. This will keep the content in place while you run your session, and help MURAL performs as intended for large groups.

    6. Avoid larger GIFs during larger collaborative sessions

    If you are running a session with over 20+ participants, we recommend that collaborators refrain from using large GIF files.

    I hope this helps!

    Ari- Collaboration Coach