profile-inspect 0.1.3

Analyze V8 CPU and heap profiles from Node.js/Chrome DevTools
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288

# Profile Inspect Report — CPU

**Profile:** `CPU.20260124.025603.56745.0.001.cpuprofile`
**Duration:** 3135.04 ms | **Samples:** 2516 | **Interval:** ~1.25 ms
**Internals filter:** ON | **Sourcemaps:** OFF

---

## Executive Summary

| Category | Time | % | Assessment |
|----------|------|---|------------|
| App code | 105.54 ms | 3.4% | normal |
| Dependencies | 160.33 ms | 5.1% | normal |
| Node.js internals | 196.09 ms | 6.3% | normal |
| V8/Native | 2673.08 ms | 85.3% | dominant |

**Key takeaways:**
- 92% in internals — likely startup/module loading; profile under sustained load for better signal

---

## Top Hotspots by Self Time

> Self time answers: "Which function burns CPU directly?"

| # | Self | % | Samples | Inclusive | Function | Location | Category |
|---|------|---|---------|-----------|----------|----------|----------|
| 1 | 136.50 ms | 4.4% | 109 | 298.96 ms | `_runInlinedModule` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25` | Deps |
| 2 | 8.79 ms | 0.3% | 7 | 16.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js:9:23` | App |
| 3 | 3.79 ms | 0.1% | 3 | 25.17 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 4 | 2.54 ms | 0.1% | 2 | 3.79 ms | `findInDirectory` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/prettier-BvPMcj5n.js:9508:31` | App |
| 5 | 2.50 ms | 0.1% | 2 | 2.50 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/html-DfTbHn3r.js:1964:112` | App |
| 6 | 2.04 ms | 0.1% | 2 | 2.04 ms | `Fb` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:135304:12` | App |
| 7 | 1.29 ms | 0.0% | 1 | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/postcss-B18KV238.js:12:19` | App |
| 8 | 1.29 ms | 0.0% | 1 | 30.21 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:1` | App |
| 9 | 1.29 ms | 0.0% | 2 | 2.12 ms | `VB.K.finalize` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:813:41` | App |
| 10 | 1.29 ms | 0.0% | 1 | 2.54 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 11 | 1.29 ms | 0.0% | 1 | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 12 | 1.29 ms | 0.0% | 1 | 2.54 ms | `Mae` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:140698:13` | App |
| 13 | 1.29 ms | 0.0% | 1 | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+runner@4.0.15/node_modules/@vitest/runner/dist/index.js:138:9` | Deps |
| 14 | 1.29 ms | 0.0% | 1 | 1.29 ms | `st` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/babel-Ds1ilLK4.js:4076:13` | App |
| 15 | 1.29 ms | 0.0% | 1 | 2.54 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 16 | 1.29 ms | 0.0% | 1 | 1.29 ms | `oQ` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:79657:14` | App |
| 17 | 1.29 ms | 0.0% | 1 | 1.29 ms | `i` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:3300:19` | App |
| 18 | 1.25 ms | 0.0% | 1 | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+spy@4.0.15/node_modules/@vitest/spy/dist/index.js:1:1` | Deps |
| 19 | 1.25 ms | 0.0% | 1 | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+runner@4.0.15/node_modules/@vitest/runner/dist/index.js:1:1` | Deps |
| 20 | 1.25 ms | 0.0% | 1 | 1.25 ms | `requireArray` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/vi.2VT5v0um.js:494:23` | Deps |
| 21 | 1.25 ms | 0.0% | 1 | 3.25 ms | `startTests` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+runner@4.0.15/node_modules/@vitest/runner/dist/index.js:1907:26` | Deps |
| 22 | 1.25 ms | 0.0% | 1 | 6.17 ms | `cachedRequest` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:1043:21` | Deps |
| 23 | 1.25 ms | 0.0% | 1 | 1.25 ms | `resolve` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:45:25` | Deps |
| 24 | 1.25 ms | 0.0% | 1 | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/angular-cPIPFXzo.js:1` | App |
| 25 | 1.25 ms | 0.0% | 1 | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/babel-Ds1ilLK4.js:1` | App |

## Top Hotspots by Inclusive Time

> Inclusive time answers: "Which function's whole work is expensive?"

| # | Inclusive | % | Self | Function | Location | Category |
|---|-----------|---|------|----------|----------|----------|
| 1 | 298.96 ms | 9.5% | 136.50 ms | `_runInlinedModule` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25` | Deps |
| 2 | 30.21 ms | 1.0% | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:1` | App |
| 3 | 25.17 ms | 0.8% | 3.79 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 4 | 16.25 ms | 0.5% | 8.79 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js:9:23` | App |
| 5 | 6.17 ms | 0.2% | 1.25 ms | `cachedRequest` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:1043:21` | Deps |
| 6 | 5.00 ms | 0.2% | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/prettier-BvPMcj5n.js:1` | App |
| 7 | 3.79 ms | 0.1% | 2.54 ms | `findInDirectory` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/prettier-BvPMcj5n.js:9508:31` | App |
| 8 | 3.75 ms | 0.1% | 1.25 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/typescript-CYBlFpU0.js:1` | App |
| 9 | 3.25 ms | 0.1% | 1.25 ms | `startTests` | `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+runner@4.0.15/node_modules/@vitest/runner/dist/index.js:1907:26` | Deps |
| 10 | 2.54 ms | 0.1% | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 11 | 2.54 ms | 0.1% | 1.29 ms | `Mae` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:140698:13` | App |
| 12 | 2.54 ms | 0.1% | 1.29 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20` | App |
| 13 | 2.50 ms | 0.1% | 2.50 ms | `(anonymous)` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/html-DfTbHn3r.js:1964:112` | App |
| 14 | 2.12 ms | 0.1% | 1.29 ms | `VB.K.finalize` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:813:41` | App |
| 15 | 2.04 ms | 0.1% | 2.04 ms | `Fb` | `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:135304:12` | App |

## Hot Paths

### Path #1 — 4.4% (136.50 ms, 109 samples)

```
directRequest (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:1101:21)
  └─ runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:107:24)
    └─ $ (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/traces.U4xDYhzZ.js:113:3)
      └─ (anonymous) (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:108:47)
        └─ _runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25) ← HOTSPOT
```

**Why this path is hot:**
- Leaf function `_runInlinedModule` has 4.4% self time (self-heavy)
- Appears in 4.3% of samples (frequently executed)
- Crosses into native code (native boundary)

### Path #2 — 4.2% (132.46 ms, 106 samples)

```
directRequest (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:1101:21)
  └─ runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:107:24)
    └─ $ (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/traces.U4xDYhzZ.js:113:3)
      └─ (anonymous) (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:108:47)
        └─ _runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25)
          └─ runInThisContext (node:vm:313:26)
            └─ createScript (node:vm:268:22)
              └─ Script (node:vm:85:14) ← HOTSPOT
```

**Why this path is hot:**
- Appears in 4.2% of samples (frequently executed)
- Crosses into native code (native boundary)

### Path #3 — 0.6% (19.83 ms, 16 samples)

```
fetchModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/startModuleRunner.Iz2V0ESw.js:795:21)
  └─ readFileSync (node:fs:433:22) ← HOTSPOT
```

**Why this path is hot:**
- Crosses into native code (native boundary)

### Path #4 — 0.3% (10.04 ms, 8 samples)

```
fetchModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/startModuleRunner.Iz2V0ESw.js:795:21)
  └─ readFileSync (node:fs:433:22)
    └─ readFileUtf8 ((unknown)) ← HOTSPOT
```

**Why this path is hot:**
- Crosses into native code (native boundary)

### Path #5 — 0.3% (8.79 ms, 7 samples)

```
directRequest (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js:1101:21)
  └─ runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:107:24)
    └─ $ (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/traces.U4xDYhzZ.js:113:3)
      └─ (anonymous) (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:108:47)
        └─ _runInlinedModule (file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25)
          └─ (anonymous) (file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js:1)
            └─ (anonymous) (file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js:9:23) ← HOTSPOT
```

**Why this path is hot:**
- Crosses into native code (native boundary)

## Caller & Callee Attribution

### `_runInlinedModule` (136.50 ms self, 4.4%)
Location: `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js:110:25`

**Top callers:**
| Caller | Time attributed | Calls |
|--------|-----------------|-------|
| `(anonymous)` | 298.96 ms | 247 |

**Top callees inside:**
| Callee | Self time | Calls |
|--------|-----------|-------|
| `runInThisContext` | 132.46 ms | 106 |
| `(anonymous)` | 16.25 ms | 21 |
| `(anonymous)` | 3.75 ms | 3 |
| `(anonymous)` | 3.75 ms | 3 |
| `(anonymous)` | 1.25 ms | 1 |

**Call pattern signal:** Single caller — if result is deterministic, consider memoization.

### `(anonymous)` (8.79 ms self, 0.3%)
Location: `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js:9:23`

**Top callers:**
| Caller | Time attributed | Calls |
|--------|-----------------|-------|
| `(anonymous)` | 16.25 ms | 21 |

**Top callees inside:**
| Callee | Self time | Calls |
|--------|-----------|-------|
| `(anonymous)` | 7.46 ms | 14 |

### `(anonymous)` (3.79 ms self, 0.1%)
Location: `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js:57:20`

**Top callers:**
| Caller | Time attributed | Calls |
|--------|-----------------|-------|
| `(anonymous)` | 25.17 ms | 23 |

**Top callees inside:**
| Callee | Self time | Calls |
|--------|-----------|-------|
| `(anonymous)` | 7.54 ms | 6 |
| `(anonymous)` | 5.04 ms | 5 |
| `(anonymous)` | 5.00 ms | 6 |
| `(anonymous)` | 1.29 ms | 1 |
| `(anonymous)` | 1.25 ms | 1 |

### `findInDirectory` (2.54 ms self, 0.1%)
Location: `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/prettier-BvPMcj5n.js:9508:31`

**Top callers:**
| Caller | Time attributed | Calls |
|--------|-----------------|-------|
| `(root)` | 3.79 ms | 3 |

**Top callees inside:**
| Callee | Self time | Calls |
|--------|-----------|-------|
| `filter` | 1.25 ms | 1 |

### `(anonymous)` (2.50 ms self, 0.1%)
Location: `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/html-DfTbHn3r.js:1964:112`

**Top callers:**
| Caller | Time attributed | Calls |
|--------|-----------------|-------|
| `Ri` | 2.50 ms | 2 |

## By Source File

| File | Self | Total | Samples | Category |
|------|------|-------|---------|----------|
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/module-evaluator.js` | 136.50 ms | 901.79 ms | 745 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/dist--xku3Vyh.js` | 50.38 ms | 1066.37 ms | 928 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/flow-upegUFFJ.js` | 14.96 ms | 83.13 ms | 145 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/prettier-BvPMcj5n.js` | 13.21 ms | 74.47 ms | 68 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/html-DfTbHn3r.js` | 8.42 ms | 72.17 ms | 59 | App |
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+runner@4.0.15/node_modules/@vitest/runner/dist/index.js` | 7.33 ms | 24.42 ms | 21 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vite@7.3.0_@types+node@24.1.0_jiti@2.6.1_terser@5.44.1/node_modules/vite/dist/node/module-runner.js` | 5.92 ms | 326.29 ms | 271 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/babel-Ds1ilLK4.js` | 3.79 ms | 40.38 ms | 32 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/typescript-CYBlFpU0.js` | 3.75 ms | 6.25 ms | 5 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/postcss-B18KV238.js` | 3.75 ms | 25.00 ms | 20 | App |
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+expect@4.0.15/node_modules/@vitest/expect/dist/index.js` | 3.08 ms | 4.13 ms | 4 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/vitest@4.0.15_@types+node@24.1.0_@vitest+browser-playwright@4.0.15_happy-dom@20.0.11_jiti@2.6.1_terser@5.44.1/node_modules/vitest/dist/chunks/vi.2VT5v0um.js` | 2.38 ms | 11.92 ms | 11 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/node_modules/.pnpm/@vitest+spy@4.0.15/node_modules/@vitest/spy/dist/index.js` | 1.25 ms | 1.25 ms | 1 | Deps |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/estree-BHX6cYnM.js` | 1.25 ms | 8.83 ms | 8 | App |
| `file:///Users/qing/p/github/oxc_formatter/apps/oxfmt/dist/angular-cPIPFXzo.js` | 1.25 ms | 1.25 ms | 1 | App |

## By Dependency Package

| Package | Time | % of Deps | Top Function |
|---------|------|-----------|--------------|
| `vitest` | 142.46 ms | 88.9% | `_runInlinedModule` |
| `@vitest/runner` | 7.33 ms | 4.6% | `(anonymous)` |
| `vite` | 5.92 ms | 3.7% | `cachedRequest` |
| `@vitest/expect` | 3.08 ms | 1.9% | `setState` |
| `@vitest/spy` | 1.25 ms | 0.8% | `(anonymous)` |
| `@vitest/snapshot` | 0.29 ms | 0.2% | `parseSingleV8Stack` |

## Native Addon Analysis

**Native inclusive time:** 26.96 ms (0.9%)

**Top JS entrypoints into native:**
- (No native function calls detected in visible frames)

**What you can/can't conclude:**
- Native time includes C++ addon work and V8 internal operations
- Cannot optimize native code directly—focus on reducing call frequency
- Consider caching results or batching operations if native calls are expensive

## GC & Allocation Signals

**GC time:** 5.21 ms (0.2%) — Normal GC overhead

## Recommendations

No critical or high-impact functions detected.

The CPU time is well-distributed. Consider:
- Profiling under higher load to surface bottlenecks
- Checking I/O or network latency if overall performance is still slow

---

## Appendix: Methodology

**Stack reconstruction:** V8 captures stack samples at regular intervals. Each sample records the complete call stack from root to the currently executing function.

**Self time:** Time where a function is at the top of the stack (the leaf). This is CPU time spent *directly* in that function's code, not in its callees.

**Inclusive time:** Time where a function appears *anywhere* in the stack. This includes self time plus time in all functions it calls.

**Category classification:**
- **App:** Code from your project (not in `node_modules`)
- **Deps:** Code from `node_modules`
- **Node.js internal:** Core Node.js modules (`node:*`)
- **V8/Native:** V8 engine internals and native C++ addons