Wow. This is great! I will have to test it out. I usually use FBX, but if OBJ is now 3-5x faster or more , I’ll probably have to switch. As some others said, importing / exporting in blender is often insanely slow for highpoly meshes. Sometimes taking 5,10,15 min vs 30 seconds in other apps or 1-2 min. So with what you’ve done here, maybe blender will be about the same now!? .
Although another DCC I use , exports OBJ pretty slow or quite noticeably slower than FBX, so I’ll have to compare and see what the time differences are.
Really looking forward to this one. Been used to exporting .obj because of ZBrush and Substance Painter by having to export high poly and low poly for baking and stuff. It was always disheartening to see Blender taking several minutes to export million poly sculpts. If that’s finally fixed, it will make me very happy.
I just did a test on a 16 million Tri Scene, with multiple objects.
It took about 35~ seconds to export with the new obj option and almost 2 minutes with the FBX option.
Although importing an OBJ into 3ds Max is pretty slooow… It also imported all my stuff as 1 mesh and not seperate meshes.
Max imports / exports FBX quite noticeably faster than it does OBJ. Importing this OBJ into max is taking beyond 5 minutes and i ended up just killing the process.
The FBX took about 20 seconds to import into max by comparison.
The funny thing is, I often find blender saves files way faster than max can, with collapse/dense geo. At least vs. Max 2016. It’s just importing/exporting out of blender is often slooooooow. :’(
Thanks, I manage to build it with the patch, but it don’t seem’s to have any speedup on large OBJ import, is there a manipulation to enable the patch once build ? I have tested with different size mesh (500k, 5M, 10M and 30M) and i get same result as vanilla 2.90.
I recompiled from the branch you shared and it works great, it will greatly facilitate my workflow in photogrammetry on blender, thank you very much for the work done during this GSoC.
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