GitStress — fastapi/payments-api Concurrency Diagnostic

fastapi/payments-api

DIAGNOSTIC READY

TARGET:fastapi/payments-api1,200SOURCE INSPECTEDGRADE F·CRITICAL POOL STARVATION

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HARDWARE TELEMETRY BUS

CLK: 60HZ·STATUS: CHOKED

1. SATURATION CEILINGGRADE F

15 USERS

Physical socket starvation threshold under load

2. FATAL BOTTLENECK

users.findByEmail

routes/users.py:3 ↗

Covering B-Tree Index: Replaces sequential table scan with direct logarithmic index seek (O(log N)). SELECT * FROM users WHERE email=? seq scan

3. VERIFIED HEADROOM

+16.5× HEADROOM

REMEDIATION+16.5×

CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_users_email ON users (email);

REPRO COMMAND

EXPLAIN (ANALYZE, BUFFERS) SELECT * FROM users WHERE email = $1;

fastapi/payments-api

Connecting to GitHub API & verifying repository

Querying default branch tree & source manifests

Indexing route handlers, ORM schemas & connection pools

Solving 4-station MVA queuing network & headroom patch

fastapi/payments-api Connecting to upstream GitHub API. Verifying repository existence, access permissions, and branch tree before running concurrency analysis._