Optimize JPEG coder with flat array and Span<int> - #3
Open
CSharpKun wants to merge 1 commit into
Open
Conversation
This commit replaces int[][] Blocks with a single flat int[] array. All block operations now use Span<int> slices for safe, allocation-free access. Refs: Echostorm44#2
This file contains hidden or 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
1 participant
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Replaces
int[][] Blockswith a singleint[]flat array inJpegComponentAll block operations now use
Span<int>slices (AsSpan(blockIndex * 64, 64))Removes per-block allocations and nested loops
The jagged array caused poor cache locality and slow access as well as high pressure on GC.
Performance
All tests passed.
Refs: #2