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MAG79
Having SVP manager running will cause ping to rise to ~100ms periodically. The image is a ping series to my router, sent once per second. Nominal operation is usually 1-4 ms. Whenever SVP manager is open, it shoots up to 20-200ms.

Yes the video streams will still load, but only after the stall is over. (Alternates between stall and normal every 5-10 seconds). Basically it makes it take longer to start the stream in the case that you try to start it during the lag spike.

Here is my exact setup if you're having trouble reproducing the problem:
MBPr late 2015 Base model - MacOS 10.12 Sierra
Problem exists internally on the mac so router type shouldn't matter.
SVP (4.0.0.91/mac) - Config shouldn't matter since problem is present with only manager open, without video being rendered.
SVP-Tube either enabled or disabled
Logs show that SVP isn't doing anything during latency spikes.

Additional (mostly useless) information:
Self ping - stable 0.02-0.09ms

Router - Archer c3200: TxRate 1300mb/s
Other router - Netgear r6100: TxRate 867mb/s
Other other router - TC (forgot model): TxRate 1000mb/s
Other other other router - iPhone 7 hotspot
Other other other other router - Galaxy s7 hotspot
(point is router shouldn't matter)

No increase in CPU/GPU usage during spikes
No increase in network usage during spikes

  Software Versions:
  CoreWLAN:    11.0 (1200.25.1)
  CoreWLANKit:    12.0 (1200.25.1)
  Menu Extra:    12.0 (1200.33)
  System Information:    12.0 (1200.3)
  IO80211 Family:    12.0 (1200.12.2)
  Diagnostics:    7.0 (700.5)
  AirPort Utility:    6.3.7 (637.5)
  Interfaces:
en0:
  Card Type:    AirPort Extreme  (0x14E4, 0x133)
  Firmware Version:    Broadcom BCM43xx 1.0 (7.21.171.10.1a16)
  MAC Address:    f4:5c:89:ba:ff:61
  Locale:    FCC
  Country Code:    US
  Supported PHY Modes:    802.11 a/b/g/n/ac
  Supported Channels:    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
  Wake On Wireless:    Supported
  AirDrop:    Supported
  AirDrop Channel:    149
  Auto Unlock:    Supported
  Status:    Connected
  Current Network Information:
1300Mb5G_Low:
  PHY Mode:    802.11ac
  BSSID:    ec:08:6b:72:54:f7
  Channel:    40
  Country Code:    US
  Network Type:    Infrastructure
  Security:    WPA2 Personal
  Signal / Noise:    -61 dBm / -90 dBm
  Transmit Rate:    1170
  MCS Index:    9