{
  "id": "edge-cache/load-test-with-k6",
  "slug": "load-test-with-k6",
  "title": "Session: load-test-with-k6 — 2026-09-26",
  "type": "source",
  "project": "edge-cache",
  "date": "2026-09-26",
  "started": "2026-09-26T20:15:00+00:00",
  "ended": "2026-09-26T21:21:00+00:00",
  "model": "claude-opus-4-7",
  "cwd": "/home/dev/code/edge-cache",
  "git_branch": "chore/load-test",
  "permission_mode": "default",
  "user_messages": 1,
  "tool_calls": 3,
  "tools_used": [
    "Bash",
    "Edit",
    "Write"
  ],
  "is_subagent": false,
  "wikilinks_out": [
    "Performance",
    "TLS",
    "edge-cache",
    "k6"
  ],
  "body_text": "Project: edge-cache · Branch: chore/load-test · Mode: default · Model: claude-opus-4-7\n\nSummary\n\nWrote a k6 load test that replays a production-shaped traffic mix; found that TLS handshakes dominated CPU and enabled session resumption, raising throughput by 35% at the same p99.\n\nConversation\n\nTurn 1 — User\n\nHow much traffic can one instance take?\n\nTurn 1 — Assistant\n\nReplay a recorded mix with k6 at increasing arrival rates; profile at the knee. TLS handshakes are 60% of CPU, so turn on session tickets and resumption.\n\nTools used in this turn:\n\n- Write: loadtest/mix.js\n- Bash: k6 run loadtest/mix.js — p99 48 ms at 4.2k rps\n- Edit: server/tls.go\n\nConnections\n\n- edge-cache\n- k6\n- TLS\n- Performance",
  "sha256": "f24eab1fefa9724c",
  "source_url": "sessions/edge-cache/2026-09-26-load-test-with-k6.html"
}