#[SPZ2-6053] Lag When Placing Long Space Belts

31 messages · Page 1 of 1 (latest)

gaunt moss
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This wasn't an issue for me in EA. Video added.
If you scroll down you can see a video I took today after rolling back to 0.0.9 and there is no lag

RTX4060 8GB
i5-14400F - 10 cores, 16 threads (2.5GHz base, 4.7GHz turbo boost)
16GB DDR5 RAM
Windows 10
Game installed on SSD

marble edgeBOT
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Thank you for reporting this bug! Our team will review your report soon.
Feel free to add more details in follow-up messages — we're also scanning for duplicate reports automatically now.
📨 There are currently 40 reports awaiting team review. Due to the high volume, it may take a little longer for us to get to yours.

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• Windows: %USERPROFILE%\AppData\LocalLow\tobspr Games\shapez 2\Player.log

💾 Savegame files (.spz2) are very helpful if relevant to the issue!
Export via Main Menu → Play → click the download icon on the relevant savegame.
You can also find them here:
• Windows: %USERPROFILE%/AppData/LocalLow/tobspr Games/shapez 2/

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1. [SPZ2-840] — 🔥 92% similar

[Dev] Placing large belts may cause lag
Done • Priority: Medium • Fix: OLD Early Access • Resolution: Done

Placing long Conveyor Belts across multiple Space Platforms causes the game to become laggy. The issue occurs when dragging belts to place them across platforms arranged in a row. Several Discord players reported experiencing this lag during belt placement. However, initial testing on Alpha 5 could not confirm the issue is still present, and it may be OS-related. The bug was reportedly already fixed by a developer, with further testing showing no lag even with belts crossing many platforms.

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2. [SPZ2-503] — ✨ 90% similar

[Dev] Placing very long belts is very slow (even while dragging)
Done • Priority: Medium • Fix: 2 - Demo • Resolution: Done

When placing very long Conveyor Belts by dragging, the game performance becomes very slow. The slowdown occurs during the placement action itself, even while the player is still dragging to extend the belt. This affects the building experience by making it difficult to quickly construct long belt lines across the factory or Space Platform.

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3. [SPZ2-6053] — 👀 55% similar

Long space belts cause consistent drops in performance
To Do • Priority: Highest • Fix: Post 1.0 • Game: 0.1.1

Long Space Pipes cause consistent performance drops, including FPS dips and spikes on the performance graph. This can be reproduced in Classic Mode on a Regular scenario by placing long Space Pipes away from The Vortex. Each long Space Pipe produces a visible spike, whereas long Space Belts do not cause the same impact. The issue also severely affects Manufacture Mode gameplay. A related report suggests shapes moving slowly in parts of the factory may be connected to this problem.
💬 Threads: [1.0.3-rc3]Shapes move slow in some part

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4. [SPZ2-3206] — 👀 45% similar

Predictions still produce lag spikes
Done • Priority: High • Fix: 4 - Early Access • Game: 0.0.0-alpha23.1 • Resolution: Done

Shape Previews still cause significant performance issues and lag spikes when dragging items around in the game. The problem is triggered by having very long Space Belts (around 4000 tiles) in the Savegame, which generates excessive garbage collection taking 60ms even without deep profiling. When the Space Platform with the long belt is in view, the game becomes unplayable due to the preview calculation overhead. The lag is severe enough to make normal gameplay impossible when these condition...

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5. [SPZ2-5517] — 👀 40% similar

Improve Blueprint Placement Performance
Done • Priority: Critical • Fix: 1.0.0 Release • Resolution: Done

Placing large blueprints causes severe FPS drops, tanking to around 10 FPS, especially when fluid machines are involved. The issue occurs with blueprints containing close to 350 machines and is noticeable at minimum graphics settings and above. The root cause is that placement logic performs too many expensive computations simultaneously while moving a blueprint, including shape previews, placement rule checks, and placement map layout updates, generating excessive garbage. The proposed solut...

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6. [SPZ2-2838] — 👀 35% similar

noticeable hang when placing island blueprints after a platform with painters
Done • Priority: Highest • Fix: 4 - Early Access • Resolution: Done

Placing Space Platform blueprints after a platform containing Painters causes a noticeable hang or lag during placement. The issue occurs specifically when dragging Pin Pusher blueprints from the Output of a Painter-containing platform. Replacing Painters with other machines like Cutters or Conveyor Belts eliminates the lag. Placing a Space Belt between the Painter platform and the new platform also prevents the hang. Deleting structures in this scenario causes even worse performance issues.

Found 6 similar reports • Searched 3,605 reports • Use /check-duplicates to recheck
marble edgeBOT
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[SPZ2-6053] Lag When Placing Long Space Belts

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🔗 This bug has been linked to our internal ticket SPZ2-6053. Our development team will now have a look. Feel free to comment with further information if you believe it might be useful!

gaunt moss
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Anyone.............?

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You can see in the video after I get lag, I shorten the belt and it runs smooth again

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It starts to lag at around 500 platform units' worth of space belt

tranquil linden
gaunt moss
tranquil linden
gaunt moss
tranquil linden
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Can you retest on 0.1.1 and confirm?

gaunt moss
tranquil linden
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If you do the following:

  1. Start 0.1.1
  2. Start a new classic mode save
  3. F1 -> cheats.enable
  4. F1 -> god
    Then you will be able to attempt to place a really long space belt
gaunt moss
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Ok I'll get back to you

tranquil linden
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Thanks 🙂

gaunt moss
# tranquil linden Thanks 🙂

No worries
Ok I was getting the lag in 0.1.1
I didn't actually play 0.1.1 for long because the miner gaps bug was annoying me
But in 0.0.9 I'm not getting the lag. I took a video and went right up to 1,000 platform units

0.0.9 would be where I remember not getting the issue
:

gaunt moss
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It needs to be checked out. It started in 0.1.1 and remains in 1.0
There's not much going on there in my original video, just a line. Compared to a huge blueprint with a load of buildings

tranquil linden
gaunt moss
tranquil linden
gaunt moss
gaunt moss
tranquil linden
# gaunt moss

Your fps are limited to 60fps. So you would need to go out further until the performance drop is noticed.
Lets say that the slow down starts at 200fps and that is reflected in the graph, because the fps limit is set to 60fps (or vsync is on) it wouldn't be noticeable until going out further.

gaunt moss