[diffs] Add diffs demo profile workload#605
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Add the demo/profile harness used to measure large diff rendering through the normal diffs package path. This branch establishes the clean autoresearch baseline without changing library rendering behavior. Experiments: #3 Metric: post_paint_ready_ms baseline 91.3ms
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| addDuration(leafNodeId, durationUs, 'self'); | ||
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| const visitedNodeIds = new Set<number>(); | ||
| let currentNodeId: number | undefined = leafNodeId; | ||
| while (currentNodeId != null && !visitedNodeIds.has(currentNodeId)) { |
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The CPU bottom-up totals are inflated because each sample’s leaf node is counted twice: once via addDuration(..., 'self') and then again when the ancestor walk starts from leafNodeId. Since addDuration always increments totalUs, leaf frames get double totalMs/totalPercent, which skews the reported CPU hotspots in every run with profiling data.
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| } | ||
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| const [flag, inlineValue] = rawArg.split('=', 2); |
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Using rawArg.split('=', 2) truncates inline values that themselves contain =, e.g. --url=http://127.0.0.1:5173/?a=b becomes http://127.0.0.1:5173/?a. This can silently rewrite profile target URLs (or other inline values), causing the CLI to hit the wrong page and produce misleading failures.
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Is this something we still want to add? |
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I can always generate it again, so up to you on whether it’s useful for you.
…On Wed, Jun 10, 2026 at 5:09 PM Amadeus Demarzi ***@***.***> wrote:
*amadeus* left a comment (pierrecomputer/pierre#605)
<#605 (comment)>
Is this something we still want to add?
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Add the demo/profile harness used to measure large diff rendering through the normal diffs package path. This branch establishes the clean autoresearch baseline without changing library rendering behavior.
Experiments: #3
Metric: post_paint_ready_ms baseline 91.3ms