why do shaders on optifine perform better than on iris on my system?
the same thing happens with:
- different shaders (sometimes I get up to 30 more fps on optifine than I do on iris)
- different versions
- different worlds
- different number of other performance mods (or none)
- different cpus (this has happened so far on both my old i5 9600k and my current r7 5700x. gpu is a 3070 with the latest 560.70 drivers)
- different nvidia drivers
- different windows installs
I've used almost the exact same settings on both iris and optifine, and I say almost because optifine and sodium have very different settings options
Solution
Some person in the Distant Horizons Discord server proved that Optifine draws less shadows than Iris. Since shadows are the most performance heavy effects, cutting it short will have significant performance uplift. That's likely what Optifine did to achieve this performance boost.
