Profiling the gsplat library#
2025-09-26
3 min read time
This section provides profiling results of gsplat using different rasterization backends and configurations. All evaluations were conducted on an AMD Instinct™ MI300X GPU.
Mem: GPU memory allocated by the forward + backward rasterization process (excluding input data), measured as the difference of torch.cuda.max_memory_allocated() before and after rasterization.
FPS[fwd/bwd]: Frames per second for forward/backward passes.
Packed: Indicates if packed rasterization is enabled.
Sparse Grad: Indicates if sparse gradient computation is used.
Render RGB images#
Batch size 1, Channels 3
python profiling/main.py --batch_size 1 --scene_grid 5 --channels 3
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
0.48 |
376.8 |
209.9 |
gsplat v1.0.0 |
True |
False |
0.48 |
380.2 |
173.7 |
gsplat v1.0.0 |
False |
False |
0.60 |
349.3 |
206.0 |
Batch size 4, Channels 3
python profiling/main.py --batch_size 4 --scene_grid 5 --channels 3
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
1.92 |
143.3 |
102.8 |
gsplat v1.0.0 |
True |
False |
1.92 |
143.6 |
85.4 |
gsplat v1.0.0 |
False |
False |
2.54 |
144.2 |
89.3 |
Render feature maps#
Batch size 1, Channels 32
python profiling/main.py --batch_size 1 --scene_grid 1 --channels 32
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
0.68 |
736.7 |
189.8 |
gsplat v1.0.0 |
True |
False |
0.68 |
740.0 |
184.9 |
gsplat v1.0.0 |
False |
False |
0.67 |
614.1 |
188.6 |
Batch size 4, Channels 32
python profiling/main.py --batch_size 4 --scene_grid 1 --channels 32
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
2.74 |
213.6 |
52.8 |
gsplat v1.0.0 |
True |
False |
2.74 |
214.3 |
52.3 |
gsplat v1.0.0 |
False |
False |
2.77 |
217.1 |
52.8 |
Render a large scene#
49M Gaussians, Batch size 1, Channels 3
python profiling/main.py --batch_size 1 --scene_grid 21 --channels 3
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
1.38 |
179.0 |
143.8 |
gsplat v1.0.0 |
True |
False |
3.12 |
177.3 |
107.1 |
gsplat v1.0.0 |
False |
False |
5.93 |
179.4 |
93.1 |
107M Gaussians, Batch size 1, Channels 3
python profiling/main.py --batch_size 1 --scene_grid 31 --channels 3
Backend |
Packed |
Sparse Grad |
Mem (GB) |
FPS [fwd] |
FPS [bwd] |
|---|---|---|---|---|---|
gsplat v1.0.0 |
True |
True |
2.25 |
135.4 |
138.2 |
gsplat v1.0.0 |
True |
False |
6.16 |
135.9 |
99.8 |
gsplat v1.0.0 |
False |
False |
12.65 |
135.2 |
76.2 |