benchmark: live view CDP latency comparison (PR #174 vs #176)#179
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benchmark: live view CDP latency comparison (PR #174 vs #176)#179hiroTamada wants to merge 1 commit intomainfrom
hiroTamada wants to merge 1 commit intomainfrom
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Benchmark tool and results comparing CDP operation latency across four image variants: headless baseline, Approach 1 (Xvfb/noVNC, PR #174), Approach 2 (CDP screencast, PR #176), and headful. Covers 40+ CDP operations across 9 categories (screenshot, JS eval, DOM, input, network, page, emulation, target, composite) plus concurrent load testing. Includes results from Docker (4 vCPU / 1 GB headless, 8 vCPU / 8 GB headful), Docker with constrained headful (4 vCPU / 1 GB), and KraftCloud (Unikraft) environments. Key findings: - Approach 2 (CDP screencast) adds near-zero overhead vs baseline - Approach 1 (Xvfb/noVNC) adds ~30% overhead on input/screenshot ops - Headful under headless constraints is not viable (39% idle memory) - On Unikraft, Approach 2 remains the better choice for live view Made-with: Cursor
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Checklist
Summary
Benchmark tool and results comparing CDP operation latency across headless live view approaches to inform which implementation to ship.
Variants tested:
mainfeat/headless-live-view(PR #174)headless-cdp-live-view(PR #176)mainEnvironments tested:
Key Findings
Docker (side-by-side median latency, selected operations)
KraftCloud / Unikraft
What's Included
benchmarks/liveview/main.go— Go benchmark client (40+ CDP operations, concurrent load test, session mode for proxied CDP)benchmarks/liveview/run.sh— Docker orchestration (build, deploy, benchmark, collect stats)benchmarks/liveview/run-unikraft.sh— KraftCloud orchestrationbenchmarks/liveview/README.md— Usage guideresults/20260310-172933/— Docker 4-variant results with SUMMARY.mdresults/20260310-174639/— Headful-constrained resultsresults/headful-constrained-results.md— Headful-constrained analysisresults/ukc-final/— KraftCloud results with SUMMARY.mdConclusion
Approach 2 (CDP screencast, PR #176) is the recommended live view implementation: