import { spawn, execFileSync } from "node:child_process";import fs from "node:fs";import os from "node:os";import path from "node:path"; const repoRoot = path.resolve(import.meta.dirname, "..");const marker = "<!-- desktop-perf-trace-summary -->";const defaultPerfProjects = [ { id: "perf-project-1", cwd: "/tmp/perf/codething-mvp", name: "codething-mvp", }, { id: "perf-project-2", cwd: "/tmp/perf/contracts-bench", name: "contracts-bench", },]; function sleep(ms) { return new Promise((resolve) => setTimeout(resolve, ms));} function parseArgs(argv) { let postPr = false; let seedPath = null; for (let index = 2; index < argv.length; index += 1) { const arg = argv[index]; if (arg === "--post-pr") { postPr = true; continue; } if (arg === "--seed") { const value = argv[index + 1]; if (!value || value.startsWith("--")) { throw new Error("--seed requires a file path"); } seedPath = value; index += 1; continue; } if (arg.startsWith("--seed=")) { const value = arg.slice("--seed=".length).trim(); if (value.length === 0) { throw new Error("--seed= requires a non-empty path"); } seedPath = value; continue; } throw new Error(`Unknown argument: ${arg}`); } return { postPr, seedPath, };} function toMs(us) { return us / 1000;} function round(n, digits = 3) { return Number(n.toFixed(digits));} function mb(bytes) { return bytes / (1024 * 1024);} function summarizeTrace(tracePath) { const payload = JSON.parse(fs.readFileSync(tracePath, "utf8")); const events = payload.traceEvents; const durationByName = new Map(); const dispatchRows = []; const functionRows = []; const userTiming = new Map(); const updateCounters = []; for (const event of events) { if (event.name === "UpdateCounters" && event.args?.data) { const heap = event.args.data.jsHeapSizeUsed; if (typeof heap === "number") { updateCounters.push(heap); } } if (event.cat === "blink.user_timing" && typeof event.name === "string") { userTiming.set(event.name, (userTiming.get(event.name) ?? 0) + 1); } if (event.ph !== "X" || typeof event.dur !== "number" || typeof event.name !== "string") { continue; } const byName = durationByName.get(event.name) ?? { count: 0, dur: 0, max: 0 }; byName.count += 1; byName.dur += event.dur; byName.max = Math.max(byName.max, event.dur); durationByName.set(event.name, byName); if (event.name === "EventDispatch") { const type = event.args?.data?.type ?? ""; dispatchRows.push({ type, dur: event.dur }); } if (event.name === "FunctionCall") { const functionName = event.args?.data?.functionName ?? "(unknown)"; functionRows.push({ functionName, dur: event.dur }); } } const aggregateDispatchType = (type) => { const rows = dispatchRows.filter((row) => row.type === type); if (rows.length === 0) { return { count: 0, totalMs: 0, avgMs: 0, maxMs: 0, }; } const totalDur = rows.reduce((sum, row) => sum + row.dur, 0); const maxDur = rows.reduce((max, row) => Math.max(max, row.dur), 0); return { count: rows.length, totalMs: round(toMs(totalDur)), avgMs: round(toMs(totalDur / rows.length)), maxMs: round(toMs(maxDur)), }; }; const aggregateFunction = (name) => { const rows = functionRows.filter((row) => row.functionName === name); if (rows.length === 0) { return { count: 0, totalMs: 0, avgMs: 0, maxMs: 0, }; } const totalDur = rows.reduce((sum, row) => sum + row.dur, 0); const maxDur = rows.reduce((max, row) => Math.max(max, row.dur), 0); return { count: rows.length, totalMs: round(toMs(totalDur)), avgMs: round(toMs(totalDur / rows.length)), maxMs: round(toMs(maxDur)), }; }; const topUserTiming = [...userTiming.entries()] .toSorted((a, b) => b[1] - a[1]) .slice(0, 10) .map(([name, count]) => ({ name, count })); const topDurationEvents = [...durationByName.entries()] .map(([name, value]) => ({ name, count: value.count, totalMs: round(toMs(value.dur), 2), avgMs: round(toMs(value.dur / value.count)), maxMs: round(toMs(value.max)), })) .toSorted((a, b) => b.totalMs - a.totalMs) .slice(0, 10); const heap = (() => { if (updateCounters.length === 0) return null; const first = updateCounters[0]; const last = updateCounters[updateCounters.length - 1]; const min = Math.min(...updateCounters); const max = Math.max(...updateCounters); return { firstMb: round(mb(first), 1), lastMb: round(mb(last), 1), minMb: round(mb(min), 1), maxMb: round(mb(max), 1), deltaMb: round(mb(last - first), 1), }; })(); const longDispatchCount = dispatchRows.filter((row) => row.dur >= 50_000).length; return { keypress: aggregateDispatchType("keypress"), textInput: aggregateDispatchType("textInput"), input: aggregateDispatchType("input"), keydown: aggregateDispatchType("keydown"), dispatchDiscreteEvent: aggregateFunction("dispatchDiscreteEvent"), performWorkUntilDeadline: aggregateFunction("performWorkUntilDeadline"), longDispatchCount, heap, topUserTiming, topDurationEvents, };} const pad = (value, width) => String(value).padEnd(width, " "); function createMarkdownSummary({ tracePath, donePayload, summary, thresholds }) { const THREAD_COL_WIDTH = 8; const TITLE_COL_WIDTH = 15; const largeThreadRenderStats = Array.isArray(donePayload.interactions?.largeThreadRenderStats) ? donePayload.interactions.largeThreadRenderStats : []; const formatThreadRenderRow = (stat) => { const threadShort = typeof stat.threadId === "string" ? stat.threadId.slice(0, THREAD_COL_WIDTH) : "n/a"; const titleShort = typeof stat.threadTitleShort === "string" ? stat.threadTitleShort : typeof stat.threadId === "string" ? stat.threadId.slice(0, 15) : "n/a"; const firstRenderMs = typeof stat.firstRenderMs === "number" ? stat.firstRenderMs : typeof stat.renderMs === "number" ? stat.renderMs : "n/a"; const followUpRenderMs = typeof stat.followUpRenderMs === "number" ? stat.followUpRenderMs : "n/a"; const followUpMinMs = typeof stat.followUpMinMs === "number" ? stat.followUpMinMs : "n/a"; const followUpMaxMs = typeof stat.followUpMaxMs === "number" ? stat.followUpMaxMs : "n/a"; const followUpSampleCount = typeof stat.followUpSampleCount === "number" ? stat.followUpSampleCount : "n/a"; const deltaMs = typeof stat.deltaMs === "number" ? stat.deltaMs : "n/a"; const deltaPct = typeof stat.deltaPct === "number" ? stat.deltaPct : "n/a"; const followUpRange = typeof followUpMinMs === "number" && typeof followUpMaxMs === "number" ? `${followUpMinMs}-${followUpMaxMs} (${followUpSampleCount}x)` : "n/a"; return `| ${pad(threadShort, THREAD_COL_WIDTH)} | ${pad(titleShort, TITLE_COL_WIDTH)} | ${stat.messageCount} | ${firstRenderMs} | ${followUpRenderMs} | ${followUpRange} | ${deltaMs} | ${deltaPct}% |`; }; const seedSource = donePayload.seed?.source === "file" ? `file (\`${donePayload.seed?.path ?? "unknown"}\`)` : (donePayload.seed?.source ?? "generated"); const lines = [ marker, "## Desktop Dev Perf Trace", "", `- Command: \`bun dev:desktop\``, `- Trace: \`${tracePath}\``, `- Started: ${donePayload.startedAt ?? "n/a"}`, `- Completed: ${donePayload.completedAt ?? "n/a"}`, `- Duration: ${donePayload.durationMs ?? "n/a"} ms`, `- Seed source: ${seedSource}`, "", "### Interaction Run", "", `- Thread clicks: ${donePayload.interactions?.threadClicks ?? "n/a"}`, `- Typed chars: ${donePayload.interactions?.typedChars ?? "n/a"}`, `- Model selected: ${donePayload.interactions?.selectedModel ?? "n/a"}`, `- Terminal opened by shortcut: ${donePayload.interactions?.terminal?.openedByShortcut ?? "n/a"}`, `- Terminal shortcut modifier: ${donePayload.interactions?.terminal?.modifierUsed ?? "n/a"}`, `- Terminal splits: ${donePayload.interactions?.terminal?.splitCount ?? "n/a"}`, `- Terminal command executed: ${donePayload.interactions?.terminal?.commandFileTouched ?? "n/a"}`, `- Terminal output observed: ${donePayload.interactions?.terminal?.commandEchoObserved ?? "n/a"}`, `- Terminal marker: ${donePayload.interactions?.terminal?.commandMarker ?? "n/a"}`, "", "### Benchmark Thread Render", "", "| Thread | Title (15) | Messages | First Nav (ms) | Follow-up Median (ms) | Follow-up Range | Delta (ms) | Delta (%) |", "| --- | --- | ---: | ---: | ---: | --- | ---: | ---: |", ...(largeThreadRenderStats.length > 0 ? largeThreadRenderStats.map((stat) => formatThreadRenderRow(stat)) : ["| n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |"]), "", "### Input Event Metrics", "", "| Event | Count | Avg (ms) | Max (ms) | Total (ms) |", "| --- | ---: | ---: | ---: | ---: |", `| keypress | ${summary.keypress.count} | ${summary.keypress.avgMs} | ${summary.keypress.maxMs} | ${summary.keypress.totalMs} |`, `| textInput | ${summary.textInput.count} | ${summary.textInput.avgMs} | ${summary.textInput.maxMs} | ${summary.textInput.totalMs} |`, `| input | ${summary.input.count} | ${summary.input.avgMs} | ${summary.input.maxMs} | ${summary.input.totalMs} |`, `| keydown | ${summary.keydown.count} | ${summary.keydown.avgMs} | ${summary.keydown.maxMs} | ${summary.keydown.totalMs} |`, "", "### Scheduler/Event Hotspots", "", `- dispatchDiscreteEvent: ${summary.dispatchDiscreteEvent.totalMs}ms total (${summary.dispatchDiscreteEvent.count} calls)`, `- performWorkUntilDeadline: ${summary.performWorkUntilDeadline.totalMs}ms total (${summary.performWorkUntilDeadline.count} calls)`, `- EventDispatch spikes >= 50ms: ${summary.longDispatchCount}`, "", "### Threshold Check", "", `- keypress avg <= ${thresholds.maxKeypressAvgMs}ms: ${ summary.keypress.avgMs <= thresholds.maxKeypressAvgMs ? "pass" : "fail" }`, `- keypress max <= ${thresholds.maxKeypressMaxMs}ms: ${ summary.keypress.maxMs <= thresholds.maxKeypressMaxMs ? "pass" : "fail" }`, `- long dispatch spikes <= ${thresholds.maxLongDispatchCount}: ${ summary.longDispatchCount <= thresholds.maxLongDispatchCount ? "pass" : "fail" }`, "", ]; if (summary.heap) { lines.push("### Heap Counters", ""); lines.push( `- first=${summary.heap.firstMb}MB, last=${summary.heap.lastMb}MB, min=${summary.heap.minMb}MB, max=${summary.heap.maxMb}MB, delta=${summary.heap.deltaMb}MB`, "", ); } lines.push("### Top User Timing Marks", ""); for (const entry of summary.topUserTiming) { lines.push(`- ${entry.count}x ${entry.name}`); } lines.push("", "### Top Duration Events", ""); for (const entry of summary.topDurationEvents) { lines.push( `- ${entry.name}: total=${entry.totalMs}ms, avg=${entry.avgMs}ms, max=${entry.maxMs}ms, count=${entry.count}`, ); } lines.push(""); return lines.join("\n");} async function waitForDoneFile(donePath, child, timeoutMs) { const startedAt = Date.now(); while (Date.now() - startedAt < timeoutMs) { if (fs.existsSync(donePath)) { return JSON.parse(fs.readFileSync(donePath, "utf8")); } if (child.exitCode !== null) { throw new Error(`desktop dev process exited early (code ${child.exitCode})`); } // oxlint-disable-next-line no-await-in-loop await sleep(500); } throw new Error(`Timed out waiting for done marker at ${donePath}`);} function tailLogText(logChunks, lineCount = 120) { const lines = logChunks.join("").split(/\r?\n/); return lines.slice(-lineCount).join("\n").trim();} function inferDesktopPerfTimeoutHint(logChunks) { const joined = logChunks.join(""); const lowered = joined.toLowerCase(); if (lowered.includes("error while loading shared libraries")) { return "Electron failed to start due missing Linux shared libraries."; } if (lowered.includes("setuid_sandbox_host.cc") || lowered.includes("chrome-sandbox")) { return "Electron sandbox setup failed on Linux CI (setuid sandbox helper)."; } if (lowered.includes("no usable sandbox")) { return "Electron sandbox failed to initialize in CI."; } if (lowered.includes("port is already in use")) { return "Dev server port collision prevented Electron from loading the renderer."; } if (!joined.includes("[desktop-perf]")) { return "Desktop perf automation never started; Electron likely did not boot successfully."; } if (joined.includes("[desktop-perf]") && !joined.includes("[desktop-perf] trace recorded")) { return "Desktop perf automation started but did not complete trace recording."; } return "Desktop perf automation timed out before writing the done marker.";} async function terminateProcessTree(child) { if (child.exitCode !== null) return; if (process.platform === "win32") { try { execFileSync("taskkill", ["/pid", String(child.pid), "/T", "/F"], { stdio: "ignore" }); } catch { child.kill("SIGTERM"); } return; } try { process.kill(-child.pid, "SIGTERM"); } catch { child.kill("SIGTERM"); } await sleep(1_500); if (child.exitCode === null) { try { process.kill(-child.pid, "SIGKILL"); } catch { child.kill("SIGKILL"); } }} function detectPrNumber() { const githubRef = process.env.GITHUB_REF ?? ""; const match = githubRef.match(/refs\/pull\/(\d+)\//); if (match?.[1]) { return match[1]; } return execFileSync("gh", ["pr", "view", "--json", "number", "--jq", ".number"], { cwd: repoRoot, encoding: "utf8", }).trim();} function postSummaryToPr(summaryPath) { const prNumber = detectPrNumber(); execFileSync( "gh", ["pr", "comment", prNumber, "--body-file", summaryPath, "--edit-last", "--create-if-none"], { cwd: repoRoot, stdio: "inherit", }, );} function prepareDesktopPerfState(stateDir, perfProjects = defaultPerfProjects) { fs.mkdirSync(stateDir, { recursive: true }); for (const project of perfProjects) { try { fs.mkdirSync(project.cwd, { recursive: true }); } catch { // Some seeded paths may point to unavailable locations in CI; registry entries still work. } } const now = new Date().toISOString(); fs.writeFileSync( path.join(stateDir, "projects.json"), JSON.stringify( { version: 1, projects: perfProjects.map((project) => ({ id: project.id, cwd: project.cwd, name: project.name, createdAt: now, updatedAt: now, })), }, null, 2, ), );} function resolveSeedPath(seedPathArg) { const candidateArg = seedPathArg ?? process.env.T3CODE_DESKTOP_PERF_SEED_PATH ?? ""; if (!candidateArg || candidateArg.trim().length === 0) { const defaultCandidates = ["scripts/perf-seed.json", "apps/desktop/scripts/perf-seed.json"]; for (const candidate of defaultCandidates) { const resolved = path.resolve(repoRoot, candidate); if (fs.existsSync(resolved)) { return resolved; } } return null; } const resolved = path.isAbsolute(candidateArg) ? candidateArg : path.resolve(repoRoot, candidateArg); if (!fs.existsSync(resolved)) { throw new Error(`Seed file not found: ${resolved}`); } return resolved;} function extractProjectsFromSeed(seedPath) { const raw = JSON.parse(fs.readFileSync(seedPath, "utf8")); if (!raw || typeof raw !== "object" || !Array.isArray(raw.projects)) { return null; } const projects = raw.projects .map((project) => { if (!project || typeof project !== "object") return null; const id = typeof project.id === "string" ? project.id : ""; const cwd = typeof project.cwd === "string" ? project.cwd : ""; const name = typeof project.name === "string" ? project.name : ""; if (id.length === 0 || cwd.length === 0 || name.length === 0) return null; return { id, cwd, name }; }) .filter((project) => project !== null); if (projects.length === 0) { return null; } return projects;Lines 1–500 of 626. 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import { spawn, execFileSync } from "node:child_process"; import fs from "node:fs"; import os from "node:os"; import path from "node:path"; const repoRoot = path.resolve(import.meta.dirname, ".."); const marker = "<!-- desktop-perf-trace-summary -->"; const defaultPerfProjects = [ { id: "perf-project-1", cwd: "/tmp/perf/codething-mvp", name: "codething-mvp", }, { id: "perf-project-2", cwd: "/tmp/perf/contracts-bench", name: "contracts-bench", }, ]; function sleep(ms) { return new Promise((resolve) => setTimeout(resolve, ms)); } function parseArgs(argv) { let postPr = false; let seedPath = null; for (let index = 2; index < argv.length; index += 1) { const arg = argv[index]; if (arg === "--post-pr") { postPr = true; continue; } if (arg === "--seed") { const value = argv[index + 1]; if (!value || value.startsWith("--")) { throw new Error("--seed requires a file path"); } seedPath = value; index += 1; continue; } if (arg.startsWith("--seed=")) { const value = arg.slice("--seed=".length).trim(); if (value.length === 0) { throw new Error("--seed= requires a non-empty path"); } seedPath = value; continue; } throw new Error(`Unknown argument: ${arg}`); } return { postPr, seedPath, }; } function toMs(us) { return us / 1000; } function round(n, digits = 3) { return Number(n.toFixed(digits)); } function mb(bytes) { return bytes / (1024 * 1024); } function summarizeTrace(tracePath) { const payload = JSON.parse(fs.readFileSync(tracePath, "utf8")); const events = payload.traceEvents; const durationByName = new Map(); const dispatchRows = []; const functionRows = []; const userTiming = new Map(); const updateCounters = []; for (const event of events) { if (event.name === "UpdateCounters" && event.args?.data) { const heap = event.args.data.jsHeapSizeUsed; if (typeof heap === "number") { updateCounters.push(heap); } } if (event.cat === "blink.user_timing" && typeof event.name === "string") { userTiming.set(event.name, (userTiming.get(event.name) ?? 0) + 1); } if (event.ph !== "X" || typeof event.dur !== "number" || typeof event.name !== "string") { continue; } const byName = durationByName.get(event.name) ?? { count: 0, dur: 0, max: 0 }; byName.count += 1; byName.dur += event.dur; byName.max = Math.max(byName.max, event.dur); durationByName.set(event.name, byName); if (event.name === "EventDispatch") { const type = event.args?.data?.type ?? ""; dispatchRows.push({ type, dur: event.dur }); } if (event.name === "FunctionCall") { const functionName = event.args?.data?.functionName ?? "(unknown)"; functionRows.push({ functionName, dur: event.dur }); } } const aggregateDispatchType = (type) => { const rows = dispatchRows.filter((row) => row.type === type); if (rows.length === 0) { return { count: 0, totalMs: 0, avgMs: 0, maxMs: 0, }; } const totalDur = rows.reduce((sum, row) => sum + row.dur, 0); const maxDur = rows.reduce((max, row) => Math.max(max, row.dur), 0); return { count: rows.length, totalMs: round(toMs(totalDur)), avgMs: round(toMs(totalDur / rows.length)), maxMs: round(toMs(maxDur)), }; }; const aggregateFunction = (name) => { const rows = functionRows.filter((row) => row.functionName === name); if (rows.length === 0) { return { count: 0, totalMs: 0, avgMs: 0, maxMs: 0, }; } const totalDur = rows.reduce((sum, row) => sum + row.dur, 0); const maxDur = rows.reduce((max, row) => Math.max(max, row.dur), 0); return { count: rows.length, totalMs: round(toMs(totalDur)), avgMs: round(toMs(totalDur / rows.length)), maxMs: round(toMs(maxDur)), }; }; const topUserTiming = [...userTiming.entries()] .toSorted((a, b) => b[1] - a[1]) .slice(0, 10) .map(([name, count]) => ({ name, count })); const topDurationEvents = [...durationByName.entries()] .map(([name, value]) => ({ name, count: value.count, totalMs: round(toMs(value.dur), 2), avgMs: round(toMs(value.dur / value.count)), maxMs: round(toMs(value.max)), })) .toSorted((a, b) => b.totalMs - a.totalMs) .slice(0, 10); const heap = (() => { if (updateCounters.length === 0) return null; const first = updateCounters[0]; const last = updateCounters[updateCounters.length - 1]; const min = Math.min(...updateCounters); const max = Math.max(...updateCounters); return { firstMb: round(mb(first), 1), lastMb: round(mb(last), 1), minMb: round(mb(min), 1), maxMb: round(mb(max), 1), deltaMb: round(mb(last - first), 1), }; })(); const longDispatchCount = dispatchRows.filter((row) => row.dur >= 50_000).length; return { keypress: aggregateDispatchType("keypress"), textInput: aggregateDispatchType("textInput"), input: aggregateDispatchType("input"), keydown: aggregateDispatchType("keydown"), dispatchDiscreteEvent: aggregateFunction("dispatchDiscreteEvent"), performWorkUntilDeadline: aggregateFunction("performWorkUntilDeadline"), longDispatchCount, heap, topUserTiming, topDurationEvents, }; } const pad = (value, width) => String(value).padEnd(width, " "); function createMarkdownSummary({ tracePath, donePayload, summary, thresholds }) { const THREAD_COL_WIDTH = 8; const TITLE_COL_WIDTH = 15; const largeThreadRenderStats = Array.isArray(donePayload.interactions?.largeThreadRenderStats) ? donePayload.interactions.largeThreadRenderStats : []; const formatThreadRenderRow = (stat) => { const threadShort = typeof stat.threadId === "string" ? stat.threadId.slice(0, THREAD_COL_WIDTH) : "n/a"; const titleShort = typeof stat.threadTitleShort === "string" ? stat.threadTitleShort : typeof stat.threadId === "string" ? stat.threadId.slice(0, 15) : "n/a"; const firstRenderMs = typeof stat.firstRenderMs === "number" ? stat.firstRenderMs : typeof stat.renderMs === "number" ? stat.renderMs : "n/a"; const followUpRenderMs = typeof stat.followUpRenderMs === "number" ? stat.followUpRenderMs : "n/a"; const followUpMinMs = typeof stat.followUpMinMs === "number" ? stat.followUpMinMs : "n/a"; const followUpMaxMs = typeof stat.followUpMaxMs === "number" ? stat.followUpMaxMs : "n/a"; const followUpSampleCount = typeof stat.followUpSampleCount === "number" ? stat.followUpSampleCount : "n/a"; const deltaMs = typeof stat.deltaMs === "number" ? stat.deltaMs : "n/a"; const deltaPct = typeof stat.deltaPct === "number" ? stat.deltaPct : "n/a"; const followUpRange = typeof followUpMinMs === "number" && typeof followUpMaxMs === "number" ? `${followUpMinMs}-${followUpMaxMs} (${followUpSampleCount}x)` : "n/a"; return `| ${pad(threadShort, THREAD_COL_WIDTH)} | ${pad(titleShort, TITLE_COL_WIDTH)} | ${stat.messageCount} | ${firstRenderMs} | ${followUpRenderMs} | ${followUpRange} | ${deltaMs} | ${deltaPct}% |`; }; const seedSource = donePayload.seed?.source === "file" ? `file (\`${donePayload.seed?.path ?? "unknown"}\`)` : (donePayload.seed?.source ?? "generated"); const lines = [ marker, "## Desktop Dev Perf Trace", "", `- Command: \`bun dev:desktop\``, `- Trace: \`${tracePath}\``, `- Started: ${donePayload.startedAt ?? "n/a"}`, `- Completed: ${donePayload.completedAt ?? "n/a"}`, `- Duration: ${donePayload.durationMs ?? "n/a"} ms`, `- Seed source: ${seedSource}`, "", "### Interaction Run", "", `- Thread clicks: ${donePayload.interactions?.threadClicks ?? "n/a"}`, `- Typed chars: ${donePayload.interactions?.typedChars ?? "n/a"}`, `- Model selected: ${donePayload.interactions?.selectedModel ?? "n/a"}`, `- Terminal opened by shortcut: ${donePayload.interactions?.terminal?.openedByShortcut ?? "n/a"}`, `- Terminal shortcut modifier: ${donePayload.interactions?.terminal?.modifierUsed ?? "n/a"}`, `- Terminal splits: ${donePayload.interactions?.terminal?.splitCount ?? "n/a"}`, `- Terminal command executed: ${donePayload.interactions?.terminal?.commandFileTouched ?? "n/a"}`, `- Terminal output observed: ${donePayload.interactions?.terminal?.commandEchoObserved ?? "n/a"}`, `- Terminal marker: ${donePayload.interactions?.terminal?.commandMarker ?? "n/a"}`, "", "### Benchmark Thread Render", "", "| Thread | Title (15) | Messages | First Nav (ms) | Follow-up Median (ms) | Follow-up Range | Delta (ms) | Delta (%) |", "| --- | --- | ---: | ---: | ---: | --- | ---: | ---: |", ...(largeThreadRenderStats.length > 0 ? largeThreadRenderStats.map((stat) => formatThreadRenderRow(stat)) : ["| n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |"]), "", "### Input Event Metrics", "", "| Event | Count | Avg (ms) | Max (ms) | Total (ms) |", "| --- | ---: | ---: | ---: | ---: |", `| keypress | ${summary.keypress.count} | ${summary.keypress.avgMs} | ${summary.keypress.maxMs} | ${summary.keypress.totalMs} |`, `| textInput | ${summary.textInput.count} | ${summary.textInput.avgMs} | ${summary.textInput.maxMs} | ${summary.textInput.totalMs} |`, `| input | ${summary.input.count} | ${summary.input.avgMs} | ${summary.input.maxMs} | ${summary.input.totalMs} |`, `| keydown | ${summary.keydown.count} | ${summary.keydown.avgMs} | ${summary.keydown.maxMs} | ${summary.keydown.totalMs} |`, "", "### Scheduler/Event Hotspots", "", `- dispatchDiscreteEvent: ${summary.dispatchDiscreteEvent.totalMs}ms total (${summary.dispatchDiscreteEvent.count} calls)`, `- performWorkUntilDeadline: ${summary.performWorkUntilDeadline.totalMs}ms total (${summary.performWorkUntilDeadline.count} calls)`, `- EventDispatch spikes >= 50ms: ${summary.longDispatchCount}`, "", "### Threshold Check", "", `- keypress avg <= ${thresholds.maxKeypressAvgMs}ms: ${ summary.keypress.avgMs <= thresholds.maxKeypressAvgMs ? "pass" : "fail" }`, `- keypress max <= ${thresholds.maxKeypressMaxMs}ms: ${ summary.keypress.maxMs <= thresholds.maxKeypressMaxMs ? "pass" : "fail" }`, `- long dispatch spikes <= ${thresholds.maxLongDispatchCount}: ${ summary.longDispatchCount <= thresholds.maxLongDispatchCount ? "pass" : "fail" }`, "", ]; if (summary.heap) { lines.push("### Heap Counters", ""); lines.push( `- first=${summary.heap.firstMb}MB, last=${summary.heap.lastMb}MB, min=${summary.heap.minMb}MB, max=${summary.heap.maxMb}MB, delta=${summary.heap.deltaMb}MB`, "", ); } lines.push("### Top User Timing Marks", ""); for (const entry of summary.topUserTiming) { lines.push(`- ${entry.count}x ${entry.name}`); } lines.push("", "### Top Duration Events", ""); for (const entry of summary.topDurationEvents) { lines.push( `- ${entry.name}: total=${entry.totalMs}ms, avg=${entry.avgMs}ms, max=${entry.maxMs}ms, count=${entry.count}`, ); } lines.push(""); return lines.join("\n"); } async function waitForDoneFile(donePath, child, timeoutMs) { const startedAt = Date.now(); while (Date.now() - startedAt < timeoutMs) { if (fs.existsSync(donePath)) { return JSON.parse(fs.readFileSync(donePath, "utf8")); } if (child.exitCode !== null) { throw new Error(`desktop dev process exited early (code ${child.exitCode})`); } // oxlint-disable-next-line no-await-in-loop await sleep(500); } throw new Error(`Timed out waiting for done marker at ${donePath}`); } function tailLogText(logChunks, lineCount = 120) { const lines = logChunks.join("").split(/\r?\n/); return lines.slice(-lineCount).join("\n").trim(); } function inferDesktopPerfTimeoutHint(logChunks) { const joined = logChunks.join(""); const lowered = joined.toLowerCase(); if (lowered.includes("error while loading shared libraries")) { return "Electron failed to start due missing Linux shared libraries."; } if (lowered.includes("setuid_sandbox_host.cc") || lowered.includes("chrome-sandbox")) { return "Electron sandbox setup failed on Linux CI (setuid sandbox helper)."; } if (lowered.includes("no usable sandbox")) { return "Electron sandbox failed to initialize in CI."; } if (lowered.includes("port is already in use")) { return "Dev server port collision prevented Electron from loading the renderer."; } if (!joined.includes("[desktop-perf]")) { return "Desktop perf automation never started; Electron likely did not boot successfully."; } if (joined.includes("[desktop-perf]") && !joined.includes("[desktop-perf] trace recorded")) { return "Desktop perf automation started but did not complete trace recording."; } return "Desktop perf automation timed out before writing the done marker."; } async function terminateProcessTree(child) { if (child.exitCode !== null) return; if (process.platform === "win32") { try { execFileSync("taskkill", ["/pid", String(child.pid), "/T", "/F"], { stdio: "ignore" }); } catch { child.kill("SIGTERM"); } return; } try { process.kill(-child.pid, "SIGTERM"); } catch { child.kill("SIGTERM"); } await sleep(1_500); if (child.exitCode === null) { try { process.kill(-child.pid, "SIGKILL"); } catch { child.kill("SIGKILL"); } } } function detectPrNumber() { const githubRef = process.env.GITHUB_REF ?? ""; const match = githubRef.match(/refs\/pull\/(\d+)\//); if (match?.[1]) { return match[1]; } return execFileSync("gh", ["pr", "view", "--json", "number", "--jq", ".number"], { cwd: repoRoot, encoding: "utf8", }).trim(); } function postSummaryToPr(summaryPath) { const prNumber = detectPrNumber(); execFileSync( "gh", ["pr", "comment", prNumber, "--body-file", summaryPath, "--edit-last", "--create-if-none"], { cwd: repoRoot, stdio: "inherit", }, ); } function prepareDesktopPerfState(stateDir, perfProjects = defaultPerfProjects) { fs.mkdirSync(stateDir, { recursive: true }); for (const project of perfProjects) { try { fs.mkdirSync(project.cwd, { recursive: true }); } catch { // Some seeded paths may point to unavailable locations in CI; registry entries still work. } } const now = new Date().toISOString(); fs.writeFileSync( path.join(stateDir, "projects.json"), JSON.stringify( { version: 1, projects: perfProjects.map((project) => ({ id: project.id, cwd: project.cwd, name: project.name, createdAt: now, updatedAt: now, })), }, null, 2, ), ); } function resolveSeedPath(seedPathArg) { const candidateArg = seedPathArg ?? process.env.T3CODE_DESKTOP_PERF_SEED_PATH ?? ""; if (!candidateArg || candidateArg.trim().length === 0) { const defaultCandidates = ["scripts/perf-seed.json", "apps/desktop/scripts/perf-seed.json"]; for (const candidate of defaultCandidates) { const resolved = path.resolve(repoRoot, candidate); if (fs.existsSync(resolved)) { return resolved; } } return null; } const resolved = path.isAbsolute(candidateArg) ? candidateArg : path.resolve(repoRoot, candidateArg); if (!fs.existsSync(resolved)) { throw new Error(`Seed file not found: ${resolved}`); } return resolved; } function extractProjectsFromSeed(seedPath) { const raw = JSON.parse(fs.readFileSync(seedPath, "utf8")); if (!raw || typeof raw !== "object" || !Array.isArray(raw.projects)) { return null; } const projects = raw.projects .map((project) => { if (!project || typeof project !== "object") return null; const id = typeof project.id === "string" ? project.id : ""; const cwd = typeof project.cwd === "string" ? project.cwd : ""; const name = typeof project.name === "string" ? project.name : ""; if (id.length === 0 || cwd.length === 0 || name.length === 0) return null; return { id, cwd, name }; }) .filter((project) => project !== null); if (projects.length === 0) { return null; } return projects;