Debriefing > Bug Reports & Fixes

Massive fps drops with explosions

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Entropy-Soldier:
Interesting.  I tested this using the same circumstances Graslu did and my FPS only hovered into the 100s when i detonated 10 mines right in front of myself with all the fancy effects on.  I actually only get 600 or so in that corridor when nothing's happening, so it's not nearly as colossal a drop.


However, there is certainly something going on here.  When i placed the same 10 mines in the control room and detonated them while standing in the cells, my FPS rapidly fell to 100 before climbing back up again at roughly the same rate.  I normally cap at 120, which explains why I've never noticed it before, but I've tested it on a few maps and the same thing seems to happen everywhere. 

I tested this with everything at max, but without HDR and motion blur.  I use an AMD Phenom 2 X4 965 processor with a Radeon HD 6850 card, so there's a bit of a difference there, but i can't say I've heard of anyone who runs Intel complaining of this problem.

Regardless, here's hoping we can narrow down the potential causes a bit, because this issue could be more widespread than first suspected.

soupcan:

--- Quote from: Entropy-Soldier on June 10, 2014, 12:58:22 am ---but i can't say I've heard of anyone who runs Intel complaining of this problem.

--- End quote ---

I get this both on my desktop (AMD) and laptop (Intel + Nvidia).

killermonkey:
Is it only on this map?

Graslu:

--- Quote from: Entropy-Soldier on June 09, 2014, 10:27:50 pm ---Do you also get severe performance hits on maps with lots of particle effects, like the Perfect Dark: Source version of complex?

--- End quote ---
I get constant 150fps in Complex from PD:S, with explosions it drops to 70 or a bit less. I also noticed that it's not all of the explosions, seems like the ones close to walls or objects, not sure.
And I forgot to say, you get the drops when the fire effect is over and the smoke starts, at the end of the smoke you even get more drops, maybe that's why you didn't notice them when you exploded 10 mines in front of you, it takes some time, not sure if it's because the smoke effect or just that the fps counter have some seconds of delay. Oh and this happens in lowest settings too, though I didn't try to lower the resolution.
This happened to my old PC with a HD 5770 1GB, 4GB RAM, 32bit and a CPU of, I think, 1.8GHz, and Windows Vista. I'm using Windows 8.1 64 bit on this computer.


--- Quote from: killermonkey on June 10, 2014, 12:17:23 pm ---Is it only on this map?

--- End quote ---
No, I notice this in most of maps.

killermonkey:
Here is how the explosion works:

1) A particle effect is started (its the whole sequence, fire and smoke, same effect)
2) 1 dynamic light is created
3) 1 sound effect is created
4) Every 1/3 seconds a check is performed to see if anything is within the damage area, if so it applies the appropriate amount of damage
5) After 4 seconds the smoke starts and the dynamic light and sound are shut off

This is why your report is confusing to me... all the hard work happens BEFORE the smoke!

Code: https://github.com/goldeneye-source/ges-code/blob/ges/game/server/ges/ent/ent_geexplosion.cpp#L129

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