Big corescript performance problem in live experiences

Hi, currently in live sometimes when you join an experience you get the following impact from what looks like corescripts?
This doesn’t always happen, and in fact is hard to reproduce.

When it is happening you wont go above 40fps on a desktop pc.

Here’s the screenshot and microprofile:

microprofile-20241203-205101.html (6.7 MB)

8 Likes

I have this problem too sometimes! It’s probably the same bug that I have. Mine goes to as low as 10 FPS. It usually starts happening when Roblox launches. I’ve found that a temporary fix for this is to minimize the app, un-minimize, and then entering full-screen. There’s also the temporary fix of just restarting the app. The minimizing method also temporarily fixes another bug which prevents Roblox from responding to the fullscreen (F11) key. I’m using a g-sync display with Roblox’s rendering mode set to Vulkan, so that might be the cause of these bugs. It seems like “FFlagRenderVulkanFixMinimizeWindow” is being ignored in the other bug.

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Thanks for the report! We’ll follow up when we have an update for you.

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Any news? This is still happening, as well as with the PlayerBillboards core script, and with seemingly no way to fix. On mobile this can take upwards of 16ms per frame, instantly killing any possibility of smooth gameplay.