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Geometry Nodes: Blur node speed up #109764

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Hans Goudey merged 4 commits from mod_moder/blender:tmp_cleanup_blur_tp_map into main 2023-07-10 13:47:36 +02:00
Conversation 1 Commits 4 Files Changed 1 +13 -10
Iliya Katushenock commented 2023-07-06 00:45:56 +02:00
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Slight speed up of face topology building for blur node.
Avoid using increment with replacing by adding size.
Multithreading for accumulating offsets. Early returns
for some places. This make 4x faster loop for fully splitted
faces. Final result for face topology building is
16.9 ms -> 14.3 ms for 263 * 263 * 263 cube primitive.

Slight speed up of face topology building for blur node. Avoid using increment with replacing by adding size. Multithreading for accumulating offsets. Early returns for some places. This make 4x faster loop for fully splitted faces. Final result for face topology building is 16.9 ms -> 14.3 ms for 263 * 263 * 263 cube primitive.
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Iliya Katushenock added 1 commit 2023-07-06 00:46:08 +02:00
Iliya Katushenock requested review from Hans Goudey 2023-07-06 00:49:29 +02:00
Iliya Katushenock added this to the Nodes & Physics project 2023-07-06 00:49:32 +02:00
Hans Goudey reviewed 2023-07-06 14:22:03 +02:00
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Nice! The whole node was 1.4x faster in my test.

BEFORE
Timer 'build_face_to_face_by_edge_map': (Average: 39.9 ms, Min: 38.1 ms, Last: 42.3 ms)
Timer 'get_varray_for_context': (Average: 45.1 ms, Min: 27.2 ms, Last: 48.4 ms)

AFTER
Timer 'build_face_to_face_by_edge_map': (Average: 27.0 ms, Min: 26.4 ms, Last: 27.2 ms)
Timer 'get_varray_for_context': (Average: 32.7 ms, Min: 30.6 ms, Last: 33.1 ms)
Nice! The whole node was 1.4x faster in my test. ``` BEFORE Timer 'build_face_to_face_by_edge_map': (Average: 39.9 ms, Min: 38.1 ms, Last: 42.3 ms) Timer 'get_varray_for_context': (Average: 45.1 ms, Min: 27.2 ms, Last: 48.4 ms) AFTER Timer 'build_face_to_face_by_edge_map': (Average: 27.0 ms, Min: 26.4 ms, Last: 27.2 ms) Timer 'get_varray_for_context': (Average: 32.7 ms, Min: 30.6 ms, Last: 33.1 ms) ```
source/blender/nodes/geometry/nodes/node_geo_blur_attribute.cc Outdated
@ -198,3 +198,3 @@
Array<int> &r_indices)
{
Array<int> edge_to_poly_offsets;
Array<int> edge_to_poly_offsets_data;
Hans Goudey commented 2023-07-06 14:09:09 +02:00
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offsets_data -> offset_data

`offsets_data` -> `offset_data`
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source/blender/nodes/geometry/nodes/node_geo_blur_attribute.cc Outdated
@ -212,0 +207,4 @@
threading::parallel_for(polys.index_range(), 4096, [&](const IndexRange range) {
for (const int poly_i : range) {
for (const int edge : corner_edges.slice(polys[poly_i])) {
/* Subtract polygon itself from list of all polygons connected to edge. */
Hans Goudey commented 2023-07-06 14:11:18 +02:00
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/* Subtract polygon itself from the number of polygons connected to the edge. */

` /* Subtract polygon itself from the number of polygons connected to the edge. */`
mod_moder marked this conversation as resolved
source/blender/nodes/geometry/nodes/node_geo_blur_attribute.cc Outdated
@ -216,1 +214,4 @@
});
const OffsetIndices<int> offsets = offset_indices::accumulate_counts_to_offsets(r_offsets);
r_indices.reinitialize(offsets.total_size());
if (offsets.is_empty()) {
Hans Goudey commented 2023-07-06 14:12:20 +02:00
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I'm not sure about adding these early returns. I'm not sure it would help performance for the expected case (which isn't where many faces have no neighbors)

I'm not sure about adding these early returns. I'm not sure it would help performance for the expected case (which isn't where many faces have no neighbors)
Iliya Katushenock commented 2023-07-06 14:25:24 +02:00
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Yes, it would be strange to have such an option .. But on the other hand, maybe?

Yes, it would be strange to have such an option .. But on the other hand, maybe?
Hans Goudey commented 2023-07-06 14:28:47 +02:00
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It's fine to optimize the node for the expected case. Without some measurements demonstrating these returns improve performance, I'd rather leave them to a separate commit I guess

It's fine to optimize the node for the expected case. Without some measurements demonstrating these returns improve performance, I'd rather leave them to a separate commit I guess
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Iliya Katushenock added 2 commits 2023-07-06 18:52:08 +02:00
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Hans Goudey commented 2023-07-06 19:01:33 +02:00
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@blender-bot build

@blender-bot build
Iliya Katushenock added 1 commit 2023-07-06 19:16:34 +02:00
Hans Goudey approved these changes 2023-07-10 13:45:06 +02:00
Hans Goudey merged commit c78b6e9954 into main 2023-07-10 13:47:36 +02:00
Iliya Katushenock deleted branch tmp_cleanup_blur_tp_map 2023-07-10 13:53:51 +02:00
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