iOS client for Grain
grain.social
ios
photography
atproto
More instrumentation
authored by
Hima Aramona
and committed by
Chad Miller
b103cf64
bd896df6
+44
+2
Grain/GrainApp.swift
+2
Grain/GrainApp.swift
···
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@main
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struct GrainApp: App {
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init() {
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LaunchMetrics.beginTFP()
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LaunchMetrics.beginPreBody()
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appSignposter.emitEvent("GrainAppInitBegin")
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// Defer Nuke DataCache setup off the main-thread init path — no images
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// load during the ~800ms before MainTabView.task fires, so this is safe.
+33
Grain/Utilities/LaunchMetrics.swift
+33
Grain/Utilities/LaunchMetrics.swift
···
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import os
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@MainActor
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enum LaunchMetrics {
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static let signposter = OSSignposter(subsystem: "social.grain.grain", category: "AppLaunch")
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private static var tfpState: OSSignpostIntervalState?
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private static var preBodyState: OSSignpostIntervalState?
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private static var preBodyEnded = false
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private static var tfpEnded = false
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static func beginTFP() {
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tfpState = signposter.beginInterval("TFP", id: signposter.makeSignpostID())
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}
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static func endTFPOnce() {
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guard !tfpEnded, let state = tfpState else { return }
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tfpEnded = true
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signposter.endInterval("TFP", state)
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tfpState = nil
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}
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static func beginPreBody() {
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preBodyState = signposter.beginInterval("PreBody", id: signposter.makeSignpostID())
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}
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static func endPreBodyOnce() {
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guard !preBodyEnded, let state = preBodyState else { return }
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preBodyEnded = true
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signposter.endInterval("PreBody", state)
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preBodyState = nil
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}
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}
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Grain/Views/Feed/FeedView.swift
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Grain/Views/Feed/FeedView.swift
···
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}
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.task {
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guard !isPreview else { return }
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let prefsSpid = launchSignposter.makeSignpostID()
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let prefsState = launchSignposter.beginInterval("FeedPrefsLoad", id: prefsSpid)
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await prefsViewModel.loadIfNeeded(auth: auth.authContext())
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launchSignposter.endInterval("FeedPrefsLoad", prefsState)
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launchSignposter.emitEvent("FeedPrefsReady")
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await storyViewModel.load(auth: auth.authContext(), storyStatusCache: storyStatusCache)
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}
···
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return
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}
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if !viewModel.hasFetchedInitial {
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let initialSpid = launchSignposter.makeSignpostID()
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let initialState = launchSignposter.beginInterval("FeedInitialLoad", id: initialSpid)
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launchSignposter.emitEvent("FeedInitialLoadStart")
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await viewModel.loadInitial(auth: auth.authContext())
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launchSignposter.endInterval("FeedInitialLoad", initialState)
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launchSignposter.emitEvent("FeedFirstContent")
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LaunchMetrics.endTFPOnce()
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lastLoadTime = .now
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}
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if showSuggestedUsers, !suggestedLoaded, let did = auth.userDID {