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[Responded] /debug usage is causing hitching and performance issues

Discussion in 'Critical Issues (Blockers, Performance, Crashes)' started by Echondas, Nov 12, 2018.

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  1. Echondas

    Echondas Bug Hunter Bug Moderator

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    11/12/2018 11:36
    Title: /debug usage is causing hitching and performance issues
    Reproduction Rate: 100%
    Blocker? Yes
    Details: Don't use /debug - even if you flip it back off using /debug again - afterwards, hitching will start, that will progressively get worse - also noticeable when hitting ESC and to go in/out of the Options menu. (The game is spamming warnings about the particle system: Particle System is trying to spawn on a mesh with zero surface area)
    Steps to Reproduce: Use /debug for a few seconds, to see the warning message spam - turn it back off using /debug -- play the game for a while now - hitching gets progressively worse.
    User Specs:
    OS: Windows 10 (10.0.0) 64bit
    CPU: Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz (12) System RAM: 32678
    GPU: NVIDIA GeForce GTX 1070 GPU RAM: 8088
    SotA.QA.Win.64.767.Date.11.09.18
    Area: Novia_R2_City_Etceter/Etceter
    Area Display Name: Etceter
    Loc: (92.7, 22.1, -87.5)
    Debug: Tm92aWFfUjJfQ2l0eV9FdGNldGVyfEV0Y2V0ZXJ8KDkyLjcwNSwgMjIuMDczLCAtODcuNDgpfCgwLCAtMC4xNSwgMCwgLTAuOTg5KXwxNy40MzUyMXwyMS44NjQ3OXw5LjYxODA5NA==
     
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  2. Lord Subtleton

    Lord Subtleton Developer Emeritus

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    The /debug UI uses the legacy Unity UI system that can severely impact client performance. I was able to verify that turning off the debug UI does remove that debugging UI, and is no longer running.
     
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  3. Echondas

    Echondas Bug Hunter Bug Moderator

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    Gotcha - thanks! It seemed a lot worse than usual -- also still seeing that constant log spam for the Particle System - it's dumping it to output_log.txt also - so it's causing extra disk IO as well.
     
  4. Lord Subtleton

    Lord Subtleton Developer Emeritus

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    Would you please post some of these log spam messages?
     
  5. Echondas

    Echondas Bug Hunter Bug Moderator

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    @Lord Subtleton - sending you the full log in a PM - but it's mostly a lot of these:
    Particle System is trying to spawn on a mesh with zero surface area
    (Filename: Line: 1527)
     
  6. Lord Subtleton

    Lord Subtleton Developer Emeritus

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    Thanks. We've determined that the spam is coming from a character effect, one of those "shield of *" variants. Issue #62899.
     
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