Entering and Exiting runtime extremely sluggish

Bug Reports Studio Bugs
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1

The issue

Entering and exiting runtime [or “Play Mode”] in Studio is extremely sluggish and takes extremely long.

Device Specs
Component Spec
CPU AMD Ryzen 9 5950X
GPU AMD Radeon RX 7800 XT
RAM 64 GB
OS Windows 11 Home 24H2 26100.6725

The issue in action

Here’s a video mostly in real-time depicting how painstakingly slow playtesting in Roblox Studio is:

MicroProfiler

The MicroProfiler view reveals the following:

image
image543×259 61.4 KB

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image547×233 50.8 KB

MicroProfiler Dump included in PM.

A private message is associated with this bug report

2

This looks like a baseplate, correct?

Given that we’re not seeing any movements in play test metrics, there is likely something specific to your setup that is causing the issue. Can you also attach a log to help us track this down? Is this recent behavior for you (as in introduced with a new version of Studio) or something that’s been happening a while?

3

Another suggestion: Do you see any improvement if you change your Graphics Mode (under Studio Settings → Rendering → General → Graphics Mode) to Direct3D11?

4

Yes, this is a baseplate, alright.

This is recent behavior for me, since in previous versions, Studio wouldn’t lag when entering or exiting runtime. Log file will be attached in PM.

@swmaniac → I see an improvement. Additionally, the next-gen studio preview [which was turned on automatically] doesn’t have this issue. It could be related to what I believe is happening during viewport resizing with Vulkan.


Relevant log snippet:

2025-11-21T00:08:08.934Z,120.934723,1734,6 [FLog::Graphics] Vulkan: resizing window framebuffer to 2172x1232
2025-11-21T00:08:08.941Z,120.941704,1734,6 [FLog::Graphics] Vulkan: swapchain images 2 present mode 0 format 37 size 2172x1232
2025-11-21T00:08:08.941Z,120.941704,1734,6 [FLog::Graphics] Vulkan: resizing window framebuffer to 354x499
2025-11-21T00:08:08.946Z,120.946732,1734,6 [FLog::Graphics] Vulkan: swapchain images 2 present mode 0 format 37 size 354x499
2025-11-21T00:08:08.946Z,120.946732,1734,6 [FLog::Graphics] Vulkan: resizing window framebuffer to 354x160
2025-11-21T00:08:08.950Z,120.950752,1734,6 [FLog::Graphics] Vulkan: swapchain images 2 present mode 0 format 37 size 354x160
5

I’m going to resolve this one given the above statement that moving off D3D11 improved the issue. Vulkan isn’t fully supported and has typically just been used as a work around. Given Next gen is fully launched now I expect the issue to be resolved with these changes. Let us know if this is still an issue.