feat: native image ops with parallelized Gaussian blur #321
Conversation
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
Uses signed distance field for anti-aliased corner edges instead of ImageMagick. Enable with: cargo build --features x-native-imgops
Gaussian blur is separable: a 2D convolution decomposes into two 1D passes (horizontal then vertical), reducing O(w×h×k²) to O(w×h×k×2). For σ=20 (kernel size 121), this alone is ~60x faster. Each pass is parallelized over rows via rayon's par_chunks_mut since row computations are independent. Benchmarks on 800×800 images show ~83% improvement (~140ms → ~23ms), now 3x faster than ImageMagick. Small images (100×100) see slight overhead from thread pool setup. Run benchmarks: cargo bench -p t-rec --features x-native-imgops \ --bench decors_benchmark -- --sample-size 10 --warm-up-time 1 Or use the alias: cargo b:run --features x-native-imgops (see .cargo/config.toml)
- decors_benchmark.rs: criterion benchmarks for corner/shadow effects - profile_shadow.rs: example for CPU profiling with samply/perf - .cargo/config.toml: b:run alias for quick benchmark runs
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Outdated suggestions cannot be applied.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.
Summary
x-native-imgopsfeature flagpar_chunks_mutBenchmarks
cargo bench -p t-rec --features x-native-imgops --bench decors_benchmark -- --sample-size 10 --warm-up-time 1 # or: cargo b:run --features x-native-imgopsTest plan
cargo test --features x-native-imgops -p t-rec