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Fix Team Dashboard slow initial render by caching last fetch result #418

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Merged
rajbos merged 3 commits into from
Mar 18, 2026
Merged

Fix Team Dashboard slow initial render by caching last fetch result #418

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49e6535
Initial plan
Copilot Mar 17, 2026
90a8f6e
fix: cache Team Dashboard data to avoid slow load on every open
Copilot Mar 17, 2026
f090465
Merge branch 'main' into copilot/fix-dashboard-loading-issue
rajbos Mar 18, 2026
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28 changes: 22 additions & 6 deletions src/extension.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,7 @@ class CopilotTokenTracker implements vscode.Disposable {
private lastDetailedStats: DetailedStats | undefined;
private lastDailyStats: DailyTokenStats[] | undefined;
private lastUsageAnalysisStats: UsageAnalysisStats | undefined;
private lastDashboardData: any | undefined;
private tokenEstimators: { [key: string]: number } = tokenEstimatorsData.estimators;
private co2Per1kTokens = 0.2; // gCO2e per 1000 tokens, a rough estimate
private co2AbsorptionPerTreePerYear = 21000; // grams of CO2 per tree per year
Expand Down Expand Up @@ -357,6 +358,7 @@ class CopilotTokenTracker implements vscode.Disposable {
this.lastDetailedStats = undefined;
this.lastDailyStats = undefined;
this.lastUsageAnalysisStats = undefined;
this.lastDashboardData = undefined;

this.log(`Cache cleared successfully. Removed ${cacheSize} entries.`);
vscode.window.showInformationMessage('Cache cleared successfully. Reloading statistics...');
Expand Down Expand Up @@ -4828,20 +4830,33 @@ ${hashtag}`;
this.dashboardPanel = undefined;
});

// Load data asynchronously and send to webview
// If we have cached data, show it immediately so the panel renders fast
if (this.lastDashboardData) {
this.log("📊 Sending cached dashboard data immediately");
this.dashboardPanel.webview.postMessage({
command: "dashboardData",
data: this.lastDashboardData,
});
}

// Load (or refresh) data asynchronously and send to webview
try {
const dashboardData = await this.getDashboardData();
this.lastDashboardData = dashboardData;
this.dashboardPanel?.webview.postMessage({
command: "dashboardData",
data: dashboardData,
});
} catch (error) {
this.error("Failed to load dashboard data:", error);
this.dashboardPanel?.webview.postMessage({
command: "dashboardError",
message:
"Failed to load dashboard data. Please check backend configuration and try again.",
});
// Only show error state when there's no cached data to fall back on
if (!this.lastDashboardData) {
this.dashboardPanel?.webview.postMessage({
command: "dashboardError",
message:
"Failed to load dashboard data. Please check backend configuration and try again.",
});
}
}
}

Expand All @@ -4854,6 +4869,7 @@ ${hashtag}`;
this.dashboardPanel.webview.postMessage({ command: "dashboardLoading" });
try {
const dashboardData = await this.getDashboardData();
this.lastDashboardData = dashboardData;
this.dashboardPanel?.webview.postMessage({
command: "dashboardData",
data: dashboardData,
Expand Down
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