B42.13 still with lag spikes | Project Zomboid | Page 1

shut mountain Dec 16, 2025, 9:35 PM

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The game lags every 3ish seconds, the CPU waiting for GPU gets to like 25-45ms and the fps drops, making it unplayable (with and without mods), expecialy when inside buildings looting, the first minute or so when I enter the save its fine, after that the lag comes back

fiery garnet Dec 16, 2025, 9:52 PM

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Singleplayer?

shut mountain Dec 16, 2025, 9:52 PM

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Yes

fiery garnet Dec 16, 2025, 9:54 PM

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Can you share your logs without mods?

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logs.zip file found in %UserProfile%\Zomboid

shut mountain Dec 16, 2025, 9:54 PM

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📎 logs.zip

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should be without mods

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cause was the last time I played without them

fiery garnet Dec 16, 2025, 10:18 PM

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These logs still show mods

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You can share the console,txt insead, that shows the latest logs

shut mountain Dec 16, 2025, 10:19 PM

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📎 console.txt

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i played with mods, it lagged, then i played without and lagged again

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then i created this report

fiery garnet Dec 16, 2025, 10:21 PM

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That log still shows mods

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I need you to start the game without mods and start a new save without mods

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And reproduce it there

shut mountain Dec 16, 2025, 10:21 PM

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Hmmmm

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Ok, Ill tag you when It happens again

shut mountain Dec 16, 2025, 10:40 PM

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📎 console.txt 📎 logs.zip

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@fiery garnet here

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i booted the game without the mods and played until the lag

void sail Dec 16, 2025, 11:42 PM

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shut mountain

If you have enough memory you could try giving the game more

shut mountain Dec 17, 2025, 1:35 AM

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Where do I change that?

void sail Dec 17, 2025, 1:40 AM

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shut mountain Where do I change that?

right click in steam manage>browse local files edit ProjectZomboid64.json in a text editor and put a higher value for Xmx

shut mountain Dec 17, 2025, 1:43 AM

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I'll try with 8gb of ram

void sail Dec 17, 2025, 1:47 AM

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shut mountain I'll try with 8gb of ram

"-Xmx8g",

shut mountain Dec 17, 2025, 1:55 AM

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I did 8192m

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With no mods I think its ok until now, Ill keep playing tho

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Nah started to lag again

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fiery garnet Dec 17, 2025, 10:30 AM

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Hm, do you perhaps have Debug mode enabled?

shut mountain Dec 17, 2025, 12:14 PM

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Nope

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Only the b42 default debug

fiery garnet Dec 17, 2025, 12:44 PM

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There will be a small performance fix coming next update, once it does, can you check if that helps with this?

shut mountain Dec 17, 2025, 1:31 PM

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Sure

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When will it update?

fiery garnet Dec 17, 2025, 3:23 PM

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This or next week

shut mountain Dec 17, 2025, 3:26 PM

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Oki

shut mountain Dec 18, 2025, 11:12 PM

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@fiery garnet sorry to bother you again, but I just tested in the 42.13.1 and it still is lagging

fiery garnet Dec 18, 2025, 11:14 PM

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That is unusual, can you forward this as a bug report in that case so it gets looked at?
https://theindiestone.com/forums/index.php?/topic/43261-read-here-first-bug-reporting-guideformatting

The Indie Stone Forums

Bug Report Guide [Updated 18/12/2025]

If the game is crashing, please use the SUPPORT section of the forum and provide this information in your post. Linux/Mac Logs Location: Home\Zomboid\Logs.zip Windows Logs Location: Users\YOURNAME\Zomboid\Logs.zip The Indie Stone’s Bug Report Guide Mods must be disabled. Reports with mods will no...

shut mountain Dec 18, 2025, 11:16 PM

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Sure

shut mountain Dec 18, 2025, 11:33 PM

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Its pending approval

#B42.13 still with lag spikes