refactor(cdp): split browser core and cdp scheduler

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Spider Bench A/B

✅ All benchmark browser service runs completed; results are informational.

Public HEAD: 184 / 240 rows; 38 / 48 sites produced rows; 10 unexpected empty sites.

✅ Deterministic fixture diagnostic is clean.

Common ancestor dda59858b575 → HEAD 37f78255eaee; benchmark order: base-first; workflow: success.

Public 48-site run · informational

Metric	Base	HEAD	Δ
Run status	success	success	—
Extracted rows / contract	179 / 240	184 / 240	+5 (+2.79%)
Contract fill	74.58%	76.67%	+2.09 pp (+2.80%)
Sites with rows	37 / 48	38 / 48	+1 (+2.70%)
Sites meeting row contract	35 / 48	36 / 48	+1 (+2.86%)
Unexpected empty sites	11	10	-1 (-9.09%)
Partial-row sites	2	2	0 (0.00%)
Site outcomes	extracted: 35; HTTP error + rows: 2; empty: 7; HTTP error + empty: 1; snapshot error + empty: 3	extracted: 37; HTTP error + rows: 1; empty: 8; HTTP error + empty: 1; snapshot error + empty: 1	—
Observed duration	36.34 s	40.58 s	+4.24 s (+11.68%)
Estimated CPU	28.55 s	35.47 s	+6.92 s (+24.23%)
Peak PSS	277.56 MiB	358.90 MiB	+81.34 MiB (+29.31%)
Peak RSS	279.70 MiB	361.25 MiB	+81.56 MiB (+29.16%)
Peak threads	27	27	0 (0.00%)
Mismatched sites	0	0	0
Timeout with items	0	0	0

Category rows	Base	HEAD	Δ
news	35 / 40	35 / 40	0
stocks	20 / 40	20 / 40	0
tech	35 / 40	35 / 40	0
sports	27 / 40	32 / 40	+5
games	37 / 40	37 / 40	0
life	25 / 40	25 / 40	0

Public-site content, timing, and memory are noisy. This single A/B run reports evidence only; site outcome counts explain missing rows without treating them as a deterministic regression.

CPU and memory timelines

These are bounded 40-point views of the same complete process-tree samples used by the HTML report. CPU uses 100% per occupied logical core; memory lines are RSS first and PSS second when complete PSS samples are available.

Base

xychart-beta
    title "Base CPU"
    x-axis "Elapsed seconds" [1.038, 2.039, 3.041, 3.542, 4.043, 4.544, 5.045, 6.046, 7.048, 8.047, 9.048, 10.049, 11.05, 11.55, 12.051, 13.053, 14.054, 15.055, 16.056, 17.057, 18.559, 19.56, 20.562, 21.563, 22.564, 23.564, 24.564, 25.566, 26.567, 27.567, 28.569, 29.571, 30.572, 31.573, 32.574, 33.576, 34.578, 35.578]
    y-axis "CPU percent" 0 --> 200
    line [21.92, 115.88, 95.79, 85.82, 143.65, 127.83, 135.66, 121.86, 161.71, 48.02, 119.8, 141.89, 73.88, 2, 2, 51.89, 53.95, 10, 37.97, 107.89, 111.87, 111.85, 111.8, 109.84, 115.84, 118, 16, 59.83, 97.91, 16.01, 47.92, 75.87, 87.92, 3.99, 4, 137.76, 49.85, 115.97]

Loading

xychart-beta
    title "Base memory: RSS then PSS"
    x-axis "Elapsed seconds" [0.036, 1.038, 2.039, 3.041, 3.542, 4.043, 4.544, 5.045, 6.046, 7.048, 8.047, 9.048, 10.049, 11.05, 11.55, 12.051, 13.053, 14.054, 15.055, 16.056, 17.057, 18.559, 19.56, 20.562, 21.563, 22.564, 23.564, 24.564, 25.566, 26.567, 27.567, 28.569, 29.571, 30.572, 31.573, 32.574, 33.576, 34.578, 35.578, 36.337]
    y-axis "Memory MiB" 0 --> 500
    line [23.33, 117.41, 147.95, 188.4, 193.04, 235.79, 245.65, 238.53, 217.2, 250.57, 225.76, 236.4, 242.86, 219.41, 209.08, 208.35, 189.81, 202.48, 188.73, 184, 229, 209.84, 236.7, 279.7, 211.63, 221.24, 221.8, 178.67, 188.36, 197.68, 202.5, 183.48, 192.91, 204.6, 186.74, 206.82, 211.18, 191.7, 231.86, 0]
    line [21.5, 115.25, 145.79, 186.73, 191, 233.67, 243.45, 236.34, 215.02, 248.08, 223.57, 234.22, 240.67, 217.23, 206.89, 206.17, 187.53, 200.32, 186.55, 182.98, 226.81, 207.21, 234.52, 277.56, 209.46, 219.08, 219.75, 176.48, 186.21, 195.5, 200.34, 181.29, 190.73, 202.41, 184.55, 204.63, 208.99, 189.51, 229.67, 0]

Loading

HEAD

xychart-beta
    title "HEAD CPU"
    x-axis "Elapsed seconds" [1.038, 2.039, 3.041, 3.541, 4.045, 4.546, 5.547, 6.549, 8.054, 9.054, 10.055, 11.057, 12.057, 13.558, 14.558, 15.558, 16.559, 18.062, 19.063, 20.081, 21.081, 22.083, 23.585, 24.587, 25.587, 26.642, 28.519, 29.725, 30.341, 30.842, 31.845, 32.847, 34.514, 35.517, 36.518, 37.52, 39.022, 40.026]
    y-axis "CPU percent" 0 --> 200
    line [55.92, 115.85, 87.76, 153.84, 160.81, 141.84, 133.78, 105.72, 115.81, 134.02, 141.79, 71.87, 34, 49.94, 12.01, 49.95, 99.94, 115.82, 123.84, 102.78, 109.99, 115.71, 113.82, 119.89, 65.98, 44, 91.91, 49.93, 1.62, 39.93, 113.69, 103.86, 71.82, 11.97, 31.99, 115.76, 110.02, 129.72]

Loading

xychart-beta
    title "HEAD memory: RSS then PSS"
    x-axis "Elapsed seconds" [0.036, 1.038, 2.039, 3.041, 3.541, 4.045, 4.546, 5.547, 6.549, 8.054, 9.054, 10.055, 11.057, 12.057, 13.558, 14.558, 15.558, 16.559, 18.062, 19.063, 20.081, 21.081, 22.083, 23.585, 24.587, 25.587, 26.642, 28.519, 29.725, 30.341, 30.842, 31.845, 32.847, 34.514, 35.517, 36.518, 37.52, 39.022, 40.026, 40.581]
    y-axis "Memory MiB" 0 --> 500
    line [23.27, 123.81, 168.79, 187.64, 210.71, 228.18, 257.96, 224.81, 234.46, 253.64, 277.93, 279.78, 258.17, 254.72, 230.26, 231.79, 226.43, 254.78, 242.98, 259.56, 279.88, 276.36, 248.73, 285.75, 250.7, 241.36, 237.17, 239.32, 249.77, 239.45, 245.66, 299.53, 361.25, 268.46, 235, 267.27, 252.29, 241.33, 284.91, 0]
    line [21.34, 121.65, 166.78, 185.79, 208.47, 225.88, 255.72, 222.59, 232.52, 251.37, 275.31, 277.92, 255.89, 252.44, 227.99, 229.51, 224.15, 252.49, 240.69, 257.3, 277.96, 274.09, 246.46, 283.48, 248.5, 239.08, 234.89, 237.05, 247.44, 237.16, 243.37, 297.38, 358.9, 266.19, 232.73, 265.03, 250.02, 239.11, 282.68, 0]

Loading

Deterministic fixture · diagnostic

The fixture exercises 15 routes: 8 are expected to emit rows and 7 intentionally exercise empty, loading, or timeout behavior.

Metric	Base	HEAD	Δ
Run status	success	success	—
Extracted rows / contract	40 / 40	40 / 40	0 (0.00%)
Contract fill	100.00%	100.00%	0.00 pp (0.00%)
Sites with rows	8 / 15	8 / 15	0 (0.00%)
Sites meeting row contract	15 / 15	15 / 15	0 (0.00%)
Unexpected empty sites	0	0	0
Partial-row sites	0	0	0
Site outcomes	extracted: 7; HTTP error + rows: 1; empty: 3; timeout + empty: 4	extracted: 7; HTTP error + rows: 1; empty: 3; timeout + empty: 4	—
Observed duration	19.93 s	19.94 s	+0.01 s (+0.05%)
Estimated CPU	0.46 s	0.47 s	+0.01 s (+2.16%)
Peak PSS	86.81 MiB	88.70 MiB	+1.89 MiB (+2.18%)
Peak RSS	88.97 MiB	90.98 MiB	+2.01 MiB (+2.26%)
Peak threads	18	18	0 (0.00%)
Mismatched sites	0	0	0
Timeout with items	0	0	0

Full HTML, JSON, CSV, logs, and page snapshots: workflow run and full spider-bench-results artifact.

Spider Bench is informational: site failures, missing benchmark reports, failed browser service runs, fixture diagnostics, timing, and performance deltas do not fail the workflow. Build, runner, and artifact infrastructure errors can still fail it.

[github-actions]

Sequential Navigation Soak A/B

✅ HEAD completed the 200-navigation resilience and memory observation.

One browser process, one target, and one CDP session navigate CSDN → SegmentFault → Huaban → example.com repeatedly. This run issued 200 Page.navigate commands per binary.

Common ancestor dda59858b5 → HEAD 37f78255ea; benchmark order: base-first; workflow: success.

Session resilience

Metric	Base	HEAD
Attempted / planned	200 / 200	200 / 200
Direct observable pass	200 / 200	199 / 200
Failures / recovered	0 / 0	1 / 1
Recovery failures	0	0
Lifecycle order violations	0	0
Network order violations	0	0
Wall time	279.8 s	287.5 s

A public-page failure is reported separately from an unrecoverable session. The soak requires all navigation attempts, zero failed recovery, zero lifecycle/network ordering violations, and complete resource evidence.

Process-tree memory

Metric	Base	HEAD	Δ
Boundary samples	200	200	0
Boundary RSS samples	200	200	0
Boundary PSS samples	200	200	0
Periodic peak RSS	300.7 MiB	316.4 MiB	+15.8 MiB
Periodic peak PSS	298.9 MiB	314.1 MiB	+15.2 MiB
RSS · first 10 avg	223.9 MiB	238.4 MiB	+14.6 MiB
RSS · last 10 avg	234.6 MiB	227.3 MiB	-7.3 MiB
RSS · last − first window	+10.7 MiB	-11.1 MiB	-21.8 MiB
RSS · warm slope / 100 nav	+4.8 MiB	+0.1 MiB	-4.7 MiB
PSS · first 10 avg	221.7 MiB	236.4 MiB	+14.7 MiB
PSS · last 10 avg	232.9 MiB	225.2 MiB	-7.7 MiB
PSS · last − first window	+11.1 MiB	-11.3 MiB	-22.4 MiB
PSS · warm slope / 100 nav	+5.0 MiB	+0.1 MiB	-4.8 MiB
Peak file descriptors	55	54	-1
Peak threads	28	28	0

HEAD memory by 50-navigation quarter

HEAD range	Avg RSS	Final RSS	Peak RSS	Avg PSS	Final PSS	Peak FD
1–50	252.3 MiB	240.3 MiB	310.5 MiB	250.2 MiB	238.1 MiB	44
51–100	259.8 MiB	248.5 MiB	314.4 MiB	257.6 MiB	246.4 MiB	45
101–150	261.3 MiB	245.0 MiB	313.8 MiB	259.2 MiB	242.9 MiB	44
151–200	258.4 MiB	220.8 MiB	318.6 MiB	256.4 MiB	218.7 MiB	45

Raw reports and per-navigation boundary samples: workflow run and full sequential-navigation-soak-results artifact.

Public-site timing and memory are observational. Use the A/B deltas and trend shape as evidence, not as a deterministic performance threshold.