perf(slice): reduce memory allocation + replace stack #7
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The slowest part of the slice operation is the plane allocation, which is very large because it is was simple to not assume which direction will be drawn on.
(512 * sqrt(3) * 2 * anisotropy(10))^2 * 8 bytes = 2.5 GB
However, if we calculate the plane area we actually need, only a fraction of that allocation is needed.
With a smaller plane, there is no need to use a stack. We can just use regular loops.
The main issue here is whether I did the calculation right. So far so good...