From ee24ad13d12ed2f3ea97ce232b8905154138aa44 Mon Sep 17 00:00:00 2001
From: Orca Worker <orca-worker@localhost>
Date: Fri, 11 Sep 2026 21:52:40 -0700
Subject: [PATCH] perf(usage): skip session scans for empty breakdowns

---
 src/main/codex-usage/codex-usage-rollup-projections.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/codex-usage/codex-usage-rollup-projections.ts b/src/main/codex-usage/codex-usage-rollup-projections.ts
index 783abb1d7fa..1a947940c92 100644
--- a/src/main/codex-usage/codex-usage-rollup-projections.ts
+++ b/src/main/codex-usage/codex-usage-rollup-projections.ts
@@ -111,6 +111,9 @@ export function buildBreakdown(
 ): CodexUsageBreakdownRow[] {
   const rows = new Map<string, CodexUsageBreakdownRow>()
   const filteredDaily = getFilteredDaily(state, scope, range)
+  if (filteredDaily.length === 0) {
+    return []
+  }
   const filteredSessions = getFilteredSessions(state, scope, range)
 
   for (const daily of filteredDaily) {