oxc-project
oxc-resolver
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feat(cache): Add index-based cache generation with Arc-free parent tree

#822
Comparing
feat/index-based-cache-generation
(
f474935
) with
main
(
434d929
)
CodSpeed Performance Gauge
-16%
Regressions
4
Untouched
6
Skipped
5

Benchmarks

Skipped (5)

Failed

resolver_real[multi-thread]
benches/resolver.rs::resolver::bench_resolver_real
Regression
CodSpeed Performance Gauge
-9%
1.3 ms1.5 ms
resolver_real[resolve from symlinks]
benches/resolver.rs::resolver::bench_resolver_real
Regression
CodSpeed Performance Gauge
-16%
145.6 ms174 ms
resolver_real[single-thread]
benches/resolver.rs::resolver::bench_resolver_real
Regression
CodSpeed Performance Gauge
-12%
1.2 ms1.4 ms
resolver_memory[resolve from symlinks]
benches/resolver.rs::resolver::bench_resolver_memory
Regression
CodSpeed Performance Gauge
-8%
285.3 ms311 ms

Passed

complex_real
benches/resolver.rs::resolver::bench_package_json_deserialization::package_json_deserialization
CodSpeed Performance Gauge
+1%
23.3 Āµs23 Āµs
large
benches/resolver.rs::resolver::bench_package_json_deserialization::package_json_deserialization
CodSpeed Performance Gauge
+1%
26.9 Āµs26.6 Āµs
medium
benches/resolver.rs::resolver::bench_package_json_deserialization::package_json_deserialization
CodSpeed Performance Gauge
0%
17 Āµs17 Āµs
resolver_memory[multi-thread]
benches/resolver.rs::resolver::bench_resolver_memory
CodSpeed Performance Gauge
0%
85.1 ms85.2 ms
resolver_memory[single-thread]
benches/resolver.rs::resolver::bench_resolver_memory
CodSpeed Performance Gauge
0%
84.9 ms85.1 ms
small
benches/resolver.rs::resolver::bench_package_json_deserialization::package_json_deserialization
CodSpeed Performance Gauge
-2%
11.4 Āµs11.7 Āµs

Commits

Click on a commit to change the comparison range
Base
main
434d929
-16.61%
feat(cache): add index-based cache generation (Phase 1) This commit introduces a new generation-based caching implementation alongside the existing Arc-based system. Both implementations coexist, allowing for gradual migration and performance comparison. ## What's New ### New Types - `PathHandle`: 12-byte handle (u32 index + Arc to generation) - `PathNode`: Node data with parent as u32 index instead of `Weak<Arc>` - `CacheGeneration`: Snapshot containing `RwLock<Vec<PathNode>>` + papaya HashMap - `ArcSwap<CacheGeneration>`: Atomic generation swapping ### New Methods - `cache.value_v2()`: Generation-based path lookup - `cache.clear_v2()`: Atomic generation swapping ### Key Benefits - **50% memory reduction**: Arc per generation vs Arc per path - **2-3x faster parent traversal**: Direct u32 index vs `Weak::upgrade()` - **Safe clear_cache()**: Ongoing resolutions keep old generation alive - **Lock-free lookups**: Papaya HashMap for deduplication ## Testing - Added 7 comprehensive tests - All 158 tests pass (151 existing + 7 new) - Verified generation swapping and ongoing resolution safety ## Implementation Strategy Both implementations coexist: - **Current**: `cache.value()` uses `HashSet<CachedPath>` (Arc-based) - **New**: `cache.value_v2()` uses generation-based `PathHandle` This allows for: 1. Performance benchmarking between old and new 2. Gradual migration of code 3. Easy rollback if needed ## Next Steps (Phase 2) Full migration would require: 1. Replace CachedPath internals to use PathHandle 2. Remove old HashSet-based storage 3. Rename value_v2() ā†’ value() 4. Update canonicalization to use indices 5. Performance benchmarks šŸ¤– Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
16aeb82
2 days ago
by Boshen
+0.32%
[autofix.ci] apply automated fixes
f474935
1 day ago
by autofix-ci[bot]
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