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1-IPad-pro-2017-12.9-inch+Macbook-Pro-mid-2015.md

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date Feb 22 2021, by @pavlobu

Devices used in this test:

MacBook Pro (Retina, 15-inch, Mid 2015)

Processor 2.5 GHz Quad-Core Intel Core i7

RAM 16 GB 1600 MHz DDR3

Graphics AMD Radeon R9 M370X 2 GB Intel Iris Pro 1536 MB

IPad Pro 2017 12.9 inch

Deskreen version 1.0.7

Performance Test 1

(nothing happnes on second screen that Ipad is viewing, no video playing or mouse movement):

setup:

Macbook mid 2015 + IPad Pro 2017 both connected to each other with USB 3.0 cable, internet sharing from macbook to IPad sharing a full virtual display to IPad with 100% quality. virtual display resolution (info from RDM software 1440x900)

Deskreen App running on macbook resources usage: Data sent/sec: ~250 KB RAM usage: 115 MB CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 200%

Descreen Viewer (Safai browser on IPad) FPS average - 55

Performance Test 2

same setup as in test 1, but playing a racing 3d game video in virtual screen on youtube, fullscreen on IPad

--- NO auto quality change performance adjustment feature virtual display resolution (info from RDM software 1440x900)

Deskreen App running on macbook resources usage: RAM becomes 300MB usage (+185MB than in test 1) CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 280% (+80% more than in test 1) Data sent/sec ~ 2MB

Descreen Viewer (Safai browser on IPad) framerate drops to ~10 FPS then degrades to ~5FPS while playing racing game video. after playing video finished, framerate comes back to 50 FPS but there is a gum-like mouse pointer movement after that. There are situations where the framerate doesn't go up to 50 even when video is paused. So need to restart screen sharing connection to continue normal usage for user.

Performance Test 3

(nothing happnes on second screen that Ipad is viewing, no video playing or mouse movement):

setup:

virtual display resolution (info from RDM software 1440x900) Macbook mid 2015 + IPad Pro 2017 == both connected to each other with WiFi 5gh (2 meters from wifi source) sharing full virtual display to Ipad. virtual display resolution (info from RDM software 1440x900)

Deskreen App running on macbook resources usage: Data sent/sec: ~250 KB RAM usage: 115 MB CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 200%

Descreen Viewer (Safai browser on IPad) FPS average - 55

Performance Test 4

same setup as in test 1, but playing a racing 3d game video on youtube, fullscreen on IPad

--- NO auto quality change performance adjustment feature virtual display resolution (info from RDM software 1440x900)

Deskreen App running on macbook resources usage: RAM becomes 300MB usage (+185MB than in test 1) CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 280% (+80% more than in test 1) Data sent/sec ~ 2MB

Descreen Viewer (Safai browser on IPad) framerate drops to ~15 FPS then degrades to ~10 FPS while playing racing game video. after playing video finished, framerate comes back to 50 FPS but there is a gum-like mouse pointer movement after that. There are situations where the framerate doesn't go up to 50 even when video is paused. So need to restart screen sharing connection to continue normal usage for user.

Performance Test 5

same setup as in test 1, but playing a racing 3d game video on youtube, fullscreen on IPad

--- WITH auto quality change performance adjustment feature virtual display resolution (info from RDM software 1440x900)

Deskreen App running on macbook resources usage: RAM becomes 300MB usage (+185MB than in test 1) CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 280% (+80% more than in test 1) Data sent/sec ~ 600 KB

Descreen Viewer (Safai browser on IPad) framerate drops to ~ 18 MB per second Overall performance is better when changing complex video stream with video quality adjustment. the "gum" like mouse pointer movement still can appear after video playing session.

Performance Test 6

same setup as in test 1, but playing a racing 3d game video on youtube, fullscreen on IPad

--- NO auto quality change performance adjustment feature virtual display resolution (info from RDM software 1280x960)

Deskreen App running on macbook resources usage: RAM becomes 300MB usage (+185MB than in test 1) CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 290% Data sent/sec ~ 1.2MB

Descreen Viewer (Safai browser on IPad) framerate drops to ~20 FPS sometimes degrades to ~15 FPS while playing racing game video. after playing video finished, framerate comes back to 55 FPS no significant mouse pointer slow movement issues after that, but sometimes may appear and go avay after about 1 minute. If mouse pointer issue persists, need to restart connection to get rid of them

Performance Test 7

same setup as in test 1, but playing a racing 3d game video on youtube, fullscreen on IPad

--- WITH auto quality change performance adjustment feature virtual display resolution (info from RDM software 1280x960)

Deskreen App running on macbook resources usage: RAM becomes 300MB usage (+185MB than in test 1) CPU usage (macbook mid 2015 2.5 GHz Quad-Core Intel Core i7) ~ 200% Data sent/sec ~ 900 KB

Descreen Viewer (Safai browser on IPad) framerate drops to ~35 FPS sometimes degrades to ~25 FPS while playing racing game video. after playing video finished, framerate comes back to 55 FPS no significant mouse pointer slow movement issues after that, but sometimes may appear and go avay after about 1 minute. If mouse pointer issue persists, need to restart connection to get rid of them

Conclusion:

The macbook used in this example has a weak GPU. WebRTC has optimization algorithms that use GPU power for streaming videa with less latency. Overall 1280x960 resolution of virtual display, with video auto quality change mode makes Deskreen usable on that setup.