v2.0.0 #1682 Poor Performance (Linux)

toxicshadow

I realise that 2.0.0 is not an official release yet but I wanted to report a major drop in performance on Linux with the latest GIT revision.

If I use version 1.15.0 #1682 I get a constant 60 FPS with very little CPU usage but with the latest 2.0.0 #1682 (seems odd that both are reporting #1682) I average 30 - 40 FPS on the first level of Doom with much higher CPU usage spikes.

PC Specs:

Fedora 22
i7 @ 3.4Ghz
6GB Ram
Nvidia GTX 780 (Proprietary drivers 352.30)

Is there anything built into doomsday that will assist in diagnosing performance related issues?

I am using updated texture packs, ogg soundtrack, updated sound effects and some 3D models for ammo boxes, health etc. The main enemy sprites are 2D

skyjake

Is your build from the Git master done with optimizations enabled? You'll need to set CMAKE_BUILD_TYPE=Release.

toxicshadow

You did it once again. Thank you.

I am really surprised at how much the optimisation makes a difference.

skyjake

No problem! Compiler optimization certainly has a considerable effect, however in a Release build many safety checks and debug support features are also disabled, speeding things up.