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docs: update build performance benchmarks (v2.4.0) #148

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12 changes: 8 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -423,10 +423,14 @@ Self-measured on every release via CI ([build benchmarks](generated/BUILD-BENCHM

| Metric | Latest |
|---|---|
| Build speed (native) | **2.1 ms/file** |
| Build speed (WASM) | **6.4 ms/file** |
| Query time | **2ms** |
| ~50,000 files (est.) | **~105.0s build** |
| Build speed (native) | **6.7 ms/file** |
| Build speed (WASM) | **9.5 ms/file** |
| Query time | **3ms** |
| No-op rebuild (native) | **4ms** |
| 1-file rebuild (native) | **344ms** |
| Query: fn-deps | **2.1ms** |
| Query: path | **1.2ms** |
| ~50,000 files (est.) | **~335.0s build** |

Metrics are normalized per file for cross-version comparability. Times above are for a full initial build — incremental rebuilds only re-parse changed files.

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101 changes: 55 additions & 46 deletions generated/BUILD-BENCHMARKS.md
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Expand Up @@ -5,8 +5,8 @@ Metrics are normalized per file for cross-version comparability.

| Version | Engine | Date | Files | Build (ms/file) | Query (ms) | Nodes/file | Edges/file | DB (bytes/file) |
|---------|--------|------|------:|----------------:|-----------:|-----------:|-----------:|----------------:|
| 2.4.0 | native | 2026-02-26 | 109 | 2.1 ↑11% | 1.8 ↑20% | 5.9 ~ | 9.7 ↑7% | 4434 ↑15% |
| 2.4.0 | wasm | 2026-02-26 | 109 | 6.4 ↓3% | 2.1 ~ | 5.9 ~ | 9.7 ↑7% | 4434 ↑15% |
| 2.4.0 | native | 2026-02-27 | 122 | 6.7 ↑253% | 2.5 ↑67% | 6.3 ↑9% | 10.9 ↑20% | 5506 ↑43% |
| 2.4.0 | wasm | 2026-02-27 | 122 | 9.5 ↑44% | 3.4 ↑62% | 6.3 ↑9% | 10.9 ↑20% | 5506 ↑43% |
| 2.3.0 | native | 2026-02-24 | 99 | 1.9 ~ | 1.5 ↑7% | 5.8 ↑7% | 9.1 ~ | 3848 ~ |
| 2.3.0 | wasm | 2026-02-24 | 99 | 6.6 ~ | 2.1 ↑11% | 5.8 ~ | 9.1 ↑3% | 3848 ~ |
| 2.1.0 | native | 2026-02-23 | 92 | 1.9 ↓24% | 1.4 ↑17% | 5.4 ↑6% | 9.1 ↓47% | 3829 ↓14% |
Expand All @@ -20,47 +20,48 @@ Metrics are normalized per file for cross-version comparability.

| Metric | Value |
|--------|-------|
| Build time | 225ms |
| Query time | 2ms |
| Nodes | 644 |
| Edges | 1,062 |
| DB size | 472 KB |
| Files | 109 |

| Build time | 813ms |
| Query time | 3ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |
Comment on lines +23 to +28
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@greptile-apps greptile-apps bot Feb 27, 2026

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Raw totals show both engines with 3ms query time, but the version table (line 8-9) and JSON data show native: 2.5ms and wasm: 3.4ms. These values should match.

Suggested change
| Build time | 813ms |
| Query time | 3ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |
| Build time | 813ms |
| Query time | 2.5ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |


#### WASM

| Metric | Value |
|--------|-------|
| Build time | 702ms |
| Query time | 2ms |
| Nodes | 644 |
| Edges | 1,062 |
| DB size | 472 KB |
| Files | 109 |
| Build time | 1.2s |
| Query time | 3ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |
Comment on lines +34 to +39
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@greptile-apps greptile-apps bot Feb 27, 2026

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WASM query time should be 3.4ms to match the version table (line 9) and JSON data, not 3ms.

Suggested change
| Build time | 1.2s |
| Query time | 3ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |
| Build time | 1.2s |
| Query time | 3.4ms |
| Nodes | 769 |
| Edges | 1,326 |
| DB size | 656 KB |
| Files | 122 |


### Estimated performance at 50,000 files

Extrapolated linearly from per-file metrics above.

| Metric | Native (Rust) | WASM |
|--------|---:|---:|
| Build time | 105.0s | 320.0s |
| DB size | 211.4 MB | 211.4 MB |
| Nodes | 295,000 | 295,000 |
| Edges | 485,000 | 485,000 |
| Build time | 335.0s | 475.0s |
| DB size | 262.5 MB | 262.5 MB |
| Nodes | 315,000 | 315,000 |
| Edges | 545,000 | 545,000 |

### Incremental Rebuilds

| Version | Engine | No-op (ms) | 1-file (ms) |
|---------|--------|----------:|-----------:|
| 2.4.0 | wasm | 5 | 233 |
| 2.4.0 | native | 4 | 344 |
| 2.4.0 | wasm | 5 | 373 |

### Query Latency

| Version | Engine | fn-deps (ms) | fn-impact (ms) | path (ms) | roles (ms) |
|---------|--------|------------:|--------------:|----------:|----------:|
| 2.4.0 | wasm | 1.8 | 1.4 | 0.8 | 0.8 |
| 2.4.0 | native | 2.1 | 1.6 | 1.2 | 1.1 |
| 2.4.0 | wasm | 2.2 | 1.6 | 1.2 | 1.1 |

<!-- NOTES_START -->
### Notes
Expand All @@ -86,40 +87,48 @@ extractor is needed to recover the regression.
[
{
"version": "2.4.0",
"date": "2026-02-26",
"files": 109,
"date": "2026-02-27",
"files": 122,
"wasm": {
"buildTimeMs": 702,
"queryTimeMs": 2.1,
"nodes": 644,
"edges": 1062,
"dbSizeBytes": 483328,
"buildTimeMs": 1155,
"queryTimeMs": 3.4,
"nodes": 769,
"edges": 1326,
"dbSizeBytes": 671744,
"perFile": {
"buildTimeMs": 6.4,
"nodes": 5.9,
"edges": 9.7,
"dbSizeBytes": 4434
"buildTimeMs": 9.5,
"nodes": 6.3,
"edges": 10.9,
"dbSizeBytes": 5506
},
"noopRebuildMs": 5,
"oneFileRebuildMs": 233,
"oneFileRebuildMs": 373,
"queries": {
"fnDepsMs": 1.8,
"fnImpactMs": 1.4,
"pathMs": 0.8,
"rolesMs": 0.8
"fnDepsMs": 2.2,
"fnImpactMs": 1.6,
"pathMs": 1.2,
"rolesMs": 1.1
}
},
"native": {
"buildTimeMs": 225,
"queryTimeMs": 1.8,
"nodes": 644,
"edges": 1062,
"dbSizeBytes": 483328,
"buildTimeMs": 813,
"queryTimeMs": 2.5,
"nodes": 769,
"edges": 1326,
"dbSizeBytes": 671744,
"perFile": {
"buildTimeMs": 2.1,
"nodes": 5.9,
"edges": 9.7,
"dbSizeBytes": 4434
"buildTimeMs": 6.7,
"nodes": 6.3,
"edges": 10.9,
"dbSizeBytes": 5506
},
"noopRebuildMs": 4,
"oneFileRebuildMs": 344,
"queries": {
"fnDepsMs": 2.1,
"fnImpactMs": 1.6,
"pathMs": 1.2,
"rolesMs": 1.1
}
}
},
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