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Merged
carlos-alm merged 2 commits into from
Apr 6, 2026
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docs: update incremental benchmarks (3.9.1) #879

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docs: update incremental benchmarks (3.9.1)
github-actions[bot] Apr 6, 2026
e38ccec
Merge branch 'main' into benchmark/incremental-v3.9.1-20260406-070204
carlos-alm Apr 6, 2026
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72 changes: 62 additions & 10 deletions generated/benchmarks/INCREMENTAL-BENCHMARKS.md
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Expand Up @@ -6,6 +6,8 @@ Import resolution: native batch vs JS fallback throughput.

| Version | Engine | Files | Full Build | No-op | 1-File | Resolve (native) | Resolve (JS) |
|---------|--------|------:|-----------:|------:|-------:|------------------:|-------------:|
| 3.9.1 | native | 570 | 5.2s ↓20% | 15ms ↑150% | 757ms ↑44% | 7ms ↑37% | 12ms ↑13% |
| 3.9.1 | wasm | 570 | 6.9s ↑2% | 14ms ↑17% | 603ms ↑11% | 7ms ↑37% | 12ms ↑13% |
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@greptile-apps greptile-apps bot Apr 6, 2026

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P2 Native incremental builds slower than WASM

The 3.9.1 data shows the native engine's 1-file rebuild (757ms) is now 25% slower than WASM (603ms). In prior releases the two engines were roughly at parity for incremental builds (3.9.0: native 527ms vs WASM 541ms). Combined with the no-op rebuild regression (6ms → 15ms, +150%), this suggests the native engine may have a performance issue introduced in 3.9.1 specifically in the incremental code path.

This PR correctly records the measured data, but it may be worth opening a follow-up issue to investigate the root cause before the next release.

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@carlos-alm carlos-alm Apr 6, 2026

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Good catch. Opened #882 to track investigating the native incremental rebuild regression before the next release. Since this PR only records the measured data (which is correct), merging as-is and addressing the root cause separately.

| 3.9.0 | native | 567 | 6.5s ~ | 6ms ↓25% | 527ms ↑1185% | 5ms ↓18% | 11ms ~ |
| 3.9.0 | wasm | 567 | 6.8s ↓3% | 12ms ↓20% | 541ms ↓10% | 5ms ↓18% | 11ms ~ |
| 3.8.1 | native | 565 | 6.6s ↑468% | 8ms ↑14% | 41ms ↑24% | 6ms ↑51% | 11ms ↓14% |
Expand Down Expand Up @@ -47,37 +49,87 @@ Import resolution: native batch vs JS fallback throughput.

### Latest results

**Version:** 3.9.0 | **Files:** 567 | **Date:** 2026-04-04
**Version:** 3.9.1 | **Files:** 570 | **Date:** 2026-04-06

#### Native (Rust)

| Metric | Value |
|--------|------:|
| Full build | 6.5s |
| No-op rebuild | 6ms |
| 1-file rebuild | 527ms |
| Full build | 5.2s |
| No-op rebuild | 15ms |
| 1-file rebuild | 757ms |

#### WASM

| Metric | Value |
|--------|------:|
| Full build | 6.8s |
| No-op rebuild | 12ms |
| 1-file rebuild | 541ms |
| Full build | 6.9s |
| No-op rebuild | 14ms |
| 1-file rebuild | 603ms |

#### Import Resolution

| Metric | Value |
|--------|------:|
| Import pairs | 951 |
| Native batch | 5ms |
| JS fallback | 11ms |
| Native batch | 7ms |
| JS fallback | 12ms |
| Per-import (native) | 0ms |
| Per-import (JS) | 0ms |
| Speedup ratio | 2.1x |
| Speedup ratio | 1.7x |

<!-- INCREMENTAL_BENCHMARK_DATA
[
{
"version": "3.9.1",
"date": "2026-04-06",
"files": 570,
"wasm": {
"fullBuildMs": 6949,
"noopRebuildMs": 14,
"oneFileRebuildMs": 603,
"oneFilePhases": {
"setupMs": 1.5,
"parseMs": 263.1,
"insertMs": 19,
"resolveMs": 1.8,
"edgesMs": 20.5,
"structureMs": 30.8,
"rolesMs": 81.5,
"astMs": 1,
"complexityMs": 0.6,
"cfgMs": 0.3,
"dataflowMs": 0.6,
"finalizeMs": 5.1
}
},
"native": {
"fullBuildMs": 5206,
"noopRebuildMs": 15,
"oneFileRebuildMs": 757,
"oneFilePhases": {
"setupMs": 4.1,
"parseMs": 341.9,
"insertMs": 33.3,
"resolveMs": 2.3,
"edgesMs": 56.1,
"structureMs": 31.1,
"rolesMs": 83,
"astMs": 11.7,
"complexityMs": 0.3,
"cfgMs": 0.3,
"dataflowMs": 0.3,
"finalizeMs": 1
}
},
"resolve": {
"imports": 951,
"nativeBatchMs": 7,
"jsFallbackMs": 12.2,
"perImportNativeMs": 0,
"perImportJsMs": 0
}
},
{
"version": "3.9.0",
"date": "2026-04-04",
Expand Down
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