Linux Tileset Game Lag

[benw1916]

Describe the bug

I have noticed game lag and slowness after I upgraded my machine from Ubuntu 19.04 to Ubuntu 19.10.

Steps To Reproduce

Simply playing the game, using the numpad, you will notice lag in movement and general slowness.

Expected behavior

I am used to my game running faster than this; I checked the system monitor, and did not notice anything out of the ordinary, processing-wise.

Versions and configuration

• Game Version: 0.D-8668-gf7c73e0 [64-bit]

[ZhilkinSerg]

Did you use precompiled version or compiled by yourself?

[benw1916]

I have been playing the game on Ubuntu 19.04 and Ubuntu 19.10 using the precompiled version.

[ZhilkinSerg]

Can you try different renderers (can be switched in options)?

[benw1916]

I changed the renderer from the default, "software" to "opengl", and saw worse performance. I then changed it to "opengles2", and while it was slightly better, I still experienced the lag.

Should I try building the game from source?

[ZhilkinSerg]

Yes, try building by yourself.

[MinerMax555]

I can confirm the exact same things that benw1916 reported. I just did the upgrade to Ubuntu 19.10 today, rebuilt Cataclysm from source, and I am encountering the same issue.

Without any user input, Cataclysm is using up to 50% of my CPU. As soon as I start doing anything in the game, this gets far worse.

[ZhilkinSerg]

What was your build command line? Can you profile executable with perf or something and see what's eating CPU cycles?

[MinerMax555]

My build line was the following:
make -j12 RELEASE=1 LTO=1 TILES=1 SOUND=1 CCACHE=1

Unfortunately my experience with perf and programming in C/C++ in general is very limited. I'm afraid I won't be of much help

Additional version information however, might be useful if someone more experienced tries to reproduce this bug:
make - 4.2.1
libsdl2-dev - 2.0.10+dfsg1-1ubuntu1
ccache - 3.7.3-1
g++ - 9.2.1-3.1ubuntu1

If any additional information is required, please let me know.

[benw1916]

I wanted to follow up with this ticket; hopefully this is acceptable. Has anyone found a solution to this? Or at least found make commands to have the game run smoother? I've noticed that the game runs slower when it's processing the woods, and runs better when I'm zoomed in closer to my character.