It lags (game freezes) like 1 second or bit less when i place a double slab. it happens in my modpack so dunno how it goes in other situations. can u fix this please. thanks.
my modpack: https://www.technicpack.net/modpack/kenijeys-modpack.1441336

Do you happen to have Dynamic Surroundings installed?

what????????

In the modpack you were using and were experiencing placement lag, did you have the Dynamic Surroundings mod installed? I think there may be a compatibility issue between my mod and theirs

yes i had dynamic surroundings.

I confirm that removing Dynamic Surroundings from my test pack solved the placement lag - Current mod list: https://pastebin.com/ym0uDDZ7

Jumping on this issue to confirm the same problem, and as the last few comments suggested- I do have Dynamic Surroundings. Is that a problem you'd be able to fix @CJMinecraft01 or would it be better to open an issue on their side?

Here is a crash log provided by a user, vanillafix threw them to the menu and provided it:
https://paste.dimdev.org/izuvetosic.mccrash

Thanks

I am currently working on a fix for this but unfortunately I won't be able to include this into DoubleSlabs itself as it uses classes from DS. I will have to make a PR on DynamicSurroundings to try and fix this as this is a behaviour that is due to the type of blockstate I'm using meaning this issue may occur with other mods as well

Should be fixed in the latest version!

Thanks for the help in confirming that this issue was to do with Dynamic Surroundings. I've managed to create a patch within double slabs which means in the latest version the placement lag should be eradicated! Let me know if you have any further issues!

Thanks for the speedy response @CJMinecraft01, but after updating from 0.2.1 to that new 0.3.0 build I get a crash!
Edit; Not a crash, but the server hangs.
https://gist.github.com/PulzHF/ad3e488ff0071627578c9b437dd2b701

Let me know if everything is working okay and then I can close this issue :)

Let me know if everything is working okay and then I can close this issue :)

Looking into it now

@CJMinecraft01 The crash is gone, and I can't seem to replicate the lag issue

Fantastic! Thanks for all the help testing this!

i will debug into it also and will give info to here if i find any issues

Sweet. Keep me posted!