From e8a18c0025cd1376f71a952b96e6e0b705342aab Mon Sep 17 00:00:00 2001
From: Benjamin Admin <benjaminadmin@MacBook-Pro.local>
Date: Wed, 15 Apr 2026 18:43:05 +0200
Subject: [PATCH] =?UTF-8?q?perf(pitch-deck):=20fix=20slow=20financial=20sl?=
 =?UTF-8?q?ides=20=E2=80=94=20cached=20results=20+=20batch=20insert?=
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- Compute endpoint now returns cached results if available (single SELECT
  instead of DELETE + 60 INSERTs)
- When recompute is needed, batch all 60 rows into a single INSERT
- Reduces DB calls from 61 to 2 (cached) or 3 (recompute)
- Fixes timeout/blank financial slides for investors

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 .../app/api/financial-model/compute/route.ts  | 49 +++++++++++++------
 1 file changed, 35 insertions(+), 14 deletions(-)

diff --git a/pitch-deck/app/api/financial-model/compute/route.ts b/pitch-deck/app/api/financial-model/compute/route.ts
index 0517618..4008acf 100644
--- a/pitch-deck/app/api/financial-model/compute/route.ts
+++ b/pitch-deck/app/api/financial-model/compute/route.ts
@@ -28,6 +28,30 @@ export async function POST(request: NextRequest) {
 
     const client = await pool.connect()
     try {
+      // Fast path: return cached results if they exist (avoid expensive recompute + 60 inserts)
+      const cached = await client.query(
+        'SELECT * FROM pitch_fm_results WHERE scenario_id = $1 ORDER BY month',
+        [scenarioId]
+      )
+      if (cached.rows.length > 0) {
+        const results = cached.rows
+        const lastResult = results[results.length - 1]
+        const breakEvenMonth = results.find(r => r.month > 1 && (r.revenue_eur - r.total_costs_eur) >= 0)?.month || null
+        return NextResponse.json({
+          scenario_id: scenarioId,
+          results,
+          summary: {
+            final_arr: lastResult.arr_eur,
+            final_customers: lastResult.total_customers,
+            break_even_month: breakEvenMonth,
+            final_runway: lastResult.runway_months,
+            final_ltv_cac: lastResult.ltv_cac_ratio,
+            peak_burn: Math.max(...results.map((r: Record<string, number>) => r.burn_rate_eur)),
+            total_funding_needed: Math.round(Math.abs(Math.min(...results.map((r: Record<string, number>) => r.cash_balance_eur), 0)) * 100) / 100,
+          },
+        })
+      }
+
       // Load assumptions
       const assumptionsRes = await client.query(
         'SELECT key, value, value_type FROM pitch_fm_assumptions WHERE scenario_id = $1',
@@ -150,19 +174,15 @@ export async function POST(request: NextRequest) {
         })
       }
 
-      // Save to DB (upsert)
+      // Save to DB (batch insert — single query instead of 60 individual inserts)
       await client.query('DELETE FROM pitch_fm_results WHERE scenario_id = $1', [scenarioId])
-      for (const r of results) {
-        await client.query(`
-          INSERT INTO pitch_fm_results (scenario_id, month, year, month_in_year,
-            new_customers, churned_customers, total_customers,
-            mrr_eur, arr_eur, revenue_eur,
-            cogs_eur, personnel_eur, infra_eur, marketing_eur, total_costs_eur,
-            employees_count, gross_margin_pct, burn_rate_eur, runway_months,
-            cac_eur, ltv_eur, ltv_cac_ratio,
-            cash_balance_eur, cumulative_revenue_eur)
-          VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17,$18,$19,$20,$21,$22,$23,$24)
-        `, [
+      const cols = 'scenario_id, month, year, month_in_year, new_customers, churned_customers, total_customers, mrr_eur, arr_eur, revenue_eur, cogs_eur, personnel_eur, infra_eur, marketing_eur, total_costs_eur, employees_count, gross_margin_pct, burn_rate_eur, runway_months, cac_eur, ltv_eur, ltv_cac_ratio, cash_balance_eur, cumulative_revenue_eur'
+      const values: unknown[] = []
+      const placeholders: string[] = []
+      results.forEach((r, i) => {
+        const offset = i * 24
+        placeholders.push(`(${Array.from({length: 24}, (_, j) => `$${offset + j + 1}`).join(',')})`)
+        values.push(
           scenarioId, r.month, r.year, r.month_in_year,
           r.new_customers, r.churned_customers, r.total_customers,
           r.mrr_eur, r.arr_eur, r.revenue_eur,
@@ -170,8 +190,9 @@ export async function POST(request: NextRequest) {
           r.employees_count, r.gross_margin_pct, r.burn_rate_eur, r.runway_months,
           r.cac_eur, r.ltv_eur, r.ltv_cac_ratio,
           r.cash_balance_eur, r.cumulative_revenue_eur,
-        ])
-      }
+        )
+      })
+      await client.query(`INSERT INTO pitch_fm_results (${cols}) VALUES ${placeholders.join(',')}`, values)
 
       const lastResult = results[results.length - 1]
       return NextResponse.json({