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| 1 | +import type { Page } from "@playwright/test" |
| 2 | +import { expectSessionTitle } from "../../utils/waits" |
| 3 | +import { mockOpenCodeServer } from "../../utils/mock-server" |
| 4 | +import { benchmark, expect, withBenchmarkPage } from "../benchmark" |
| 5 | +import { fixture } from "./session-timeline-stress.fixture" |
| 6 | +import { installStressSessionTabs, stressSessionHref } from "./timeline-test-helpers" |
| 7 | +import { measureSessionSwitch, waitForStableTimeline } from "./session-tab-switch-probe" |
| 8 | + |
| 9 | +type ParentHydrationBenchmarkMode = "natural" | "candidate" |
| 10 | + |
| 11 | +const mode = process.env.SESSION_PARENT_HYDRATION_BENCHMARK_MODE ?? "natural" |
| 12 | +if (mode !== "natural" && mode !== "candidate") throw new Error(`Unknown parent hydration benchmark mode: ${mode}`) |
| 13 | +const userID = "msg_parent_hydration_user" |
| 14 | +const user = { |
| 15 | + ...fixture.messages[fixture.targetID][0]!, |
| 16 | + info: { ...fixture.messages[fixture.targetID][0]!.info, id: userID, time: { created: 1700001000000 } }, |
| 17 | + parts: fixture.messages[fixture.targetID][0]!.parts.map((part, index) => ({ |
| 18 | + ...part, |
| 19 | + id: `prt_parent_hydration_user_${index}`, |
| 20 | + messageID: userID, |
| 21 | + })), |
| 22 | +} |
| 23 | +const assistantSeed = fixture.messages[fixture.targetID][3]! |
| 24 | +const assistants = Array.from({ length: 14 }, (_, index) => { |
| 25 | + const messageID = `msg_parent_hydration_${String(index).padStart(2, "0")}` |
| 26 | + return { |
| 27 | + ...assistantSeed, |
| 28 | + info: { |
| 29 | + ...assistantSeed.info, |
| 30 | + id: messageID, |
| 31 | + parentID: userID, |
| 32 | + time: { created: 1700001001000 + index * 1_000, completed: 1700001001500 + index * 1_000 }, |
| 33 | + }, |
| 34 | + parts: assistantSeed.parts.map((part, partIndex) => ({ |
| 35 | + ...part, |
| 36 | + id: `prt_parent_hydration_${String(index).padStart(2, "0")}_${partIndex}`, |
| 37 | + messageID, |
| 38 | + })), |
| 39 | + } |
| 40 | +}) |
| 41 | +const messages = [user, ...assistants] |
| 42 | +const target = fixture.sessions.find((session) => session.id === fixture.targetID)! |
| 43 | +const lastID = userID |
| 44 | +const lastPartID = assistants.at(-1)!.parts.at(-1)!.id |
| 45 | + |
| 46 | +benchmark("hydrates an orphaned latest turn after a cold session click", async ({ browser, report }, testInfo) => { |
| 47 | + benchmark.setTimeout(180_000) |
| 48 | + const results = [] as Awaited<ReturnType<typeof trial>>[] |
| 49 | + for (let run = 0; run < 5; run++) { |
| 50 | + results.push( |
| 51 | + await withBenchmarkPage( |
| 52 | + browser, |
| 53 | + `session-parent-hydration-${mode}-${run}`, |
| 54 | + (page) => trial(page, mode), |
| 55 | + testInfo, |
| 56 | + ), |
| 57 | + ) |
| 58 | + } |
| 59 | + const timing = results.map((result) => result.metrics.firstCorrectObservedMs!).sort((a, b) => a - b) |
| 60 | + report( |
| 61 | + { |
| 62 | + results: results.map((result) => ({ ...result.metrics, historyGateCount: result.historyGateCount })), |
| 63 | + summary: { |
| 64 | + firstCorrectObservedMs: { min: timing[0], median: timing[2], max: timing.at(-1) }, |
| 65 | + blankSamples: results.map((result) => result.metrics.blankSamples), |
| 66 | + requestCounts: { |
| 67 | + list: results.map((result) => result.requestCounts.list), |
| 68 | + parent: results.map((result) => result.requestCounts.parent), |
| 69 | + }, |
| 70 | + historyGateCount: results.map((result) => result.historyGateCount), |
| 71 | + }, |
| 72 | + }, |
| 73 | + { mode }, |
| 74 | + ) |
| 75 | +}) |
| 76 | + |
| 77 | +async function trial(page: Page, mode: ParentHydrationBenchmarkMode) { |
| 78 | + const requests: { type: "list" | "parent"; before?: string }[] = [] |
| 79 | + const history = mode === "candidate" ? Promise.withResolvers<void>() : undefined |
| 80 | + let historyGates = 0 |
| 81 | + await mockOpenCodeServer(page, { |
| 82 | + sessions: fixture.sessions.filter((session) => session.id === fixture.sourceID), |
| 83 | + provider: fixture.provider, |
| 84 | + directory: fixture.directory, |
| 85 | + project: fixture.project, |
| 86 | + messageDelay: 50, |
| 87 | + onMessages: (request) => { |
| 88 | + if (request.sessionID === fixture.targetID && request.phase === "start") |
| 89 | + requests.push({ type: "list", before: request.before }) |
| 90 | + }, |
| 91 | + beforeMessagesResponse: (request) => { |
| 92 | + if (mode !== "candidate" || request.sessionID !== fixture.targetID || !request.before) return Promise.resolve() |
| 93 | + historyGates++ |
| 94 | + return history!.promise |
| 95 | + }, |
| 96 | + onMessage: (request) => { |
| 97 | + if (request.sessionID === fixture.targetID && request.messageID === userID) requests.push({ type: "parent" }) |
| 98 | + }, |
| 99 | + message: (sessionID, messageID) => { |
| 100 | + if (sessionID !== fixture.targetID || messageID !== userID) return |
| 101 | + return user |
| 102 | + }, |
| 103 | + pageMessages: (sessionID, limit, before) => { |
| 104 | + const items = sessionID === fixture.targetID ? messages : fixture.messages[fixture.sourceID] |
| 105 | + const end = before ? items.findIndex((message) => message.info.id === before) : items.length |
| 106 | + const start = Math.max(0, end - limit) |
| 107 | + return { items: items.slice(start, end), cursor: start > 0 ? items[start]!.info.id : undefined } |
| 108 | + }, |
| 109 | + }) |
| 110 | + await page.route(`**/session/${fixture.targetID}`, (route) => |
| 111 | + route.fulfill({ status: 200, contentType: "application/json", body: JSON.stringify(target) }), |
| 112 | + ) |
| 113 | + await installStressSessionTabs(page, { sessionIDs: [fixture.sourceID] }) |
| 114 | + await page.goto(stressSessionHref(fixture.sourceID)) |
| 115 | + await expectSessionTitle(page, fixture.expected.sourceTitle) |
| 116 | + await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!) |
| 117 | + |
| 118 | + const href = stressSessionHref(fixture.targetID) |
| 119 | + await page.evaluate( |
| 120 | + ({ href, title }) => { |
| 121 | + const link = document.createElement("a") |
| 122 | + link.id = "parent-hydration-target" |
| 123 | + link.href = href |
| 124 | + link.textContent = title |
| 125 | + document.body.append(link) |
| 126 | + }, |
| 127 | + { href, title: target.title }, |
| 128 | + ) |
| 129 | + const metrics = await measureSessionSwitch(page, { |
| 130 | + destinationIDs: messages.map((message) => message.info.id), |
| 131 | + sourceIDs: fixture.messages[fixture.sourceID].map((message) => message.info.id), |
| 132 | + lastID, |
| 133 | + requiredPartID: lastPartID, |
| 134 | + requireBottomAnchor: false, |
| 135 | + href, |
| 136 | + switch: async () => { |
| 137 | + await page.locator("#parent-hydration-target").click() |
| 138 | + await expectSessionTitle(page, target.title) |
| 139 | + }, |
| 140 | + }).finally(() => history?.resolve()) |
| 141 | + expect(metrics.firstCorrectObservedMs).not.toBeNull() |
| 142 | + const requestCounts = { |
| 143 | + list: requests.filter((request) => request.type === "list").length, |
| 144 | + parent: requests.filter((request) => request.type === "parent").length, |
| 145 | + } |
| 146 | + if (mode === "candidate") { |
| 147 | + expect(requestCounts.parent).toBe(1) |
| 148 | + expect(historyGates).toBe(1) |
| 149 | + } |
| 150 | + return { metrics, requestCounts, historyGateCount: historyGates } |
| 151 | +} |
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