Improve runtime of GetScenePrimPaths from O(N log(N)) to O(N) #1822
Conversation
mtavenrath
changed the title
|
@tcauchois Here is the follow up to #1744. |
|
cc @marktucker. Thanks Markus, we'll take a look! |
|
Filed as internal issue #USD-7304 |
There was a problem hiding this comment.
Hi @mtavenrath, left a few review notes for you to take a look at. Thanks!
| // instance index. | ||
| return primPaths.size() != instanceIndices.size(); | ||
|
|
||
| result[instanceIndices[instanceIdxShifted]] = adapter->_GetPrimPathFromInstancerChain(instanceChain); |
There was a problem hiding this comment.
Style: Our coding conventions use a max column width of 80 characters. Could you please line-wrap this (and other lines below) to conform to that limit?
| for (size_t i = 0; i < remappedIndices.size(); i++) | ||
| result.push_back(primPathsFn.primPaths[remappedIndices[i]]); | ||
| if (!instanceIndices.empty()) { | ||
| int minIdx = INT_MAX; |
There was a problem hiding this comment.
Could we use either INT_MAX or std::numeric_limits::max() consistently instead of using both?
There was a problem hiding this comment.
changed to std::numeric_limits::max()
| // Indices in the map set to the maximum int value are not being referenced. | ||
| std::vector<int> requestedIndicesMap(maxIdx - minIdx + 1, std::numeric_limits<int>::max()); | ||
|
|
||
| // set bits for all requested indices to truefor (size_t i = 0; i < instanceIndices.size(); i++) { |
There was a problem hiding this comment.
Looks like a mangled comment here?
There was a problem hiding this comment.
The next line slipped in the comment. fixed
| if (instanceIdxShifted < 0) | ||
| return true; | ||
|
|
||
| // stop enumeration once the max index has been reached | ||
| if (size_t(instanceIdxShifted) >= instanceIndices.size()) | ||
| return false; |
There was a problem hiding this comment.
Style: Our code conventions require enclosing braces even around conditionals with one line.
mtavenrath
force-pushed
the
pxr_getsceneprimpaths
branch
from
243a24d to
04dd60c
Compare
… costly std::map/std::set data structures.
mtavenrath
force-pushed
the
pxr_getsceneprimpaths
branch
from
04dd60c to
ef3a99e
Compare
Description of Change(s)
Replace the std::set & std::map in GetScenePrimPaths by a std::vector for better memory utilization & linear time access.
Fixes Issue(s)
Improved performance of GetScenePrimPaths
I have submitted a signed Contributor License Agreement