[perf-improver] Monthly Activity 2026-06

[Evangelink]

Activity for June 2026

Suggested Actions for Maintainer

• Review PR (perf-assist/single-pass-propertybag-terminal): Single-pass PropertyBag walk in TerminalOutputDevice and SimplifiedConsoleOutputDeviceBase — eliminates 4 linked-list traversals + 1 LINQ heap alloc per test result in the terminal output path

(More items will be added as work progresses.)

Performance Opportunities Backlog

1. TestNodeResultsState.GetRunningTasks() buffer — already cached from prior run; verify still optimal after recent merges
2. General allocation audit of TerminalTestReporter hot paths (after recent pooling merges)
3. IConsole.Write(string) forces StringBuilder.ToString() alloc in StopUpdate; needs interface change, low priority

Discovered Commands

# Build (Debug)
./build.sh -build -c Debug

# Full build + test
./build.sh -test -c Debug

# Run specific unit test project
artifacts/bin/<Project>/Debug/net8.0/<Project> [--treenode-filter "/*/*/*/ClassName/Method"]

# Build + pack (required before acceptance tests)
./build.sh -pack -c Debug

Run History

2026-06-15 15:33 UTC - Run

• 🔧 Created PR (branch perf-assist/single-pass-propertybag-terminal): Single-pass PropertyBag walk in TerminalOutputDevice.ConsumeAsync and SimplifiedConsoleOutputDeviceBase.ConsumeAsync — replaces 5 O(n) traversals + 1 LINQ heap alloc per test result (terminal) and 2 traversals (simplified console) with one zero-allocation GetStructEnumerator() pass each
• ✅ Build: 0 warnings, 0 errors; Unit tests: 1160 passed, 0 failed, 3 skipped (net8.0)

2026-06-14 UTC - Run

• 🔧 Created PR [perf-improver] perf: single-pass PropertyBag walk in AzureDevOps extension #9108: Single-pass PropertyBag walk in AzureDevOpsSummaryReporter.ConsumeAsync and AzureDevOpsTestResultsPublisher.BuildAttachmentsFromTestNode — MERGED 2026-06-14 by Evangelink

2026-06-12 UTC - Run

• 🔧 Created PR [perf-improver] perf: pool RenderedProgressItem instances in AnsiTerminalTestProgressFrame #9084: Pool RenderedProgressItem instances in AnsiTerminalTestProgressFrame — eliminates ~9,000 short-lived allocations per 5-minute test run — MERGED 2026-06-14 by Evangelink
• 🔍 Identified: AzureDevOpsReport makes 3 O(n) PropertyBag passes per test result

2026-06-08 UTC - Run

• 🔍 Identified allocation hotspot in terminal progress rendering (RenderedProgressItem per render tick)
• 📊 Discovered build/test commands; validated all green

🤖 Automated content by GitHub Copilot. Posted via a maintainer's GitHub token, so it appears under their account — the account owner did not write or approve this content personally. Generated by the Perf Improver workflow. · 1.2K AIC · ⌖ 39.4 AIC · [◷]( · ◷)

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