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IDProjectCategoryView StatusLast Update
0030125RunnerWindowsPublic2018-10-31 16:12
ReporterAntanas BudvytisAssigned ToStewart Bishop 
PriorityHighSeverityB - MajorReproducibility100%
Status ClosedResolutionFixed 
PlatformWindowsOSWindows 7OS Version
Product Version2.1.5 
Target Version2.2.1Fixed in Version2.2.1 
Summary0030125: Windows: Framerate stutters on Windows 7 specifically
DescriptionWith the new IDE version, I'm noticing a massive performance issue that I believe is related to Windows 7.

I created a simple visual graph that tracks delta_time every frame, and roughly how long a frame took to process (from the start of begin-step to the end of draw-gui), and I've included the project file in this bug report.

I've tested it on 6 different PCs (2x Win7, 4x Win10) and the results are consistent: on Windows 10, it runs fine, but on Windows 7 it cannot seem to maintain the specified FPS. Specifying a gamespeed of 60fps causes the delta_time to fluctuate wildly between 16.67 (normal) and 33.33, nearly every frame, as shown in the included screenshot.

At different framerates, it stutters at different intervals. For example, 55 seems to run at precisely 30fps. Some framerates, such as 30, 50, 62, and seemingly anything above 67, work perfectly fine.
Steps To ReproduceRun sample project on Windows 7.
TagsNo tags attached.
1.4 Found In
2.x Runtime Found In2.1.5.246
2.x Runtime Verified In2.2.1.273


related to 0029146 ClosedMike Rennie General: FPS is consistently wrong across platforms when using a high refresh rate monitor 


Antanas Budvytis

2018-10-23 15:15


fps test.yyz (13,965 bytes)


2018-10-31 11:43

Adminstrator   ~0061920

Confirm if fixed as part of