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Google Chrome has VSYNC issues -- You can help get Chrome fixed!

Test for the Chrome bug (switches to a larger 44MP background image)

Firefox is hopelessly broken (timers/vsync/etc) -- DO NOT USE!
VSYNC in Firefox under Windows is broken -- Details

Edge and IE do not support high Hz displays -- Details

Web browser "VSYNC synchronization" tester
vsynctester.com - A novel way to EASILY verify web browser VSYNC
synchronization, display Hz, and input lag!
    How it works


VSYNC indicator, rgb (0-255)
Performance graph, scale ms (1-100)
    frame VSYNC offset (blue) locked
    'late' / vsync offset per rAF time (purple)
    inter-frame (green/red) right scale
    render time (brown)   'spin-wait' (gray)
Use rAF time arg as frame time
Custom Hz (1-500), skew ms (0-25)
    Precise timing via spin wait up to ms (1-9)
    Maximum setTimeout() ms of ms (9-50)
Background images MP (1-99) Preview
    Use up to (1-20) images Stress
    Scroll pixels/frame (1-50)
Mouse input lag indicator frames (0-9)
Odd Even frame pre-delay to ms (0-20)
Odd Even frame post-delay to ms (0-20)
Tear helper/bar pixels (1-20)
Drop 1 in every frames (1-200)
Frames indicator pixels (5-33)





Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/122.0.6261.94 Safari/537.36
Copyright © 2024 Jerry Jongerius · Contact Us · RT · RT×4


Web Browsers
· Chrome is broken
· Firefox is broken
· Edge/IE is broken

 
Other Test Tools
· Display Hz Tester
· GPU memory usage
· Older Display Hz test

 
Learn More
· How to compute VSYNC / Hz
· Input lag in HTML5 games
· Mouse input performance

 
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