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Massive slowdown of material editor since 4.19.2

I have an issue with the material editor in the latest versions of UE4, every time when I made the smallest change to the material graph, even if I just touch a disconnected node, it starts to recompile every time, and it takes more than a minute. I googled similar problems, and tried everything that I can, with no success. I made two videos comparing how fast it takes to change color in the material editor. Results below.

  • Normal behavior, working till 4.18.3


  • Massive slowdown since 4.19.2


For this test, I created fresh projects from 3rd person template with default settings, using BP.

My pc setup:

  • cpu i7 3770k

  • gpu gtx 1070

  • ram 16gb ddr3

  • ssd 120gb

  • os win10

Product Version: UE 4.19
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asked Apr 20 '19 at 08:17 AM in Bug Reports

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Div1ne Duck
1 2

avatar image Jeff A ♦♦ STAFF Apr 22 '19 at 05:33 PM


We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.



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