baseline

loadgen/common.lua

@@ -0,0 +1,12 @@
+-- Shared header config; required by s2/s3/s4 scripts.
+-- Override BEARER / HOST via env vars when invoking wrk2.
+
+local M = {}
+M.token   = os.getenv("BEARER") or "test-token-aaaaaaaaaaaaaaaaaaaa"
+M.host    = os.getenv("HOST")   or "127.0.0.1:8080"
+M.headers = {
+  ["Authorization"] = "Bearer " .. M.token,
+  ["Connection"]    = "keep-alive",
+  ["Host"]          = M.host,
+}
+return M

loadgen/s1_ping.lua

@@ -0,0 +1,5 @@
+-- S1: naked /ping. No auth header (the server's auth_plug exempts /ping,
+-- so sending a header would just add noise to the comparison).
+wrk.method  = "GET"
+wrk.path    = "/ping"
+wrk.headers["Connection"] = "keep-alive"

loadgen/s2_user_get.lua

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+-- S2: single-route GET with full middleware (logger + request_id + auth).
+-- :id is spread across 10_000 values to defeat per-id caching.
+
+local common = require("common")
+wrk.method  = "GET"
+wrk.headers = common.headers
+
+math.randomseed(os.time() + os.getpid())
+
+request = function()
+  local id = math.random(1, 10000)
+  return wrk.format(nil, "/api/v1/users/" .. id)
+end

loadgen/s3_mixed.lua

@@ -0,0 +1,30 @@
+-- S3 (+S4): 80% GET single / 15% GET list / 5% POST.
+-- The mix exposes the store-actor channel round-trip on urus, mutex
+-- contention on axum, and gen_server message-pass on cowboy without
+-- making writes the bottleneck.
+
+local common = require("common")
+wrk.headers = common.headers
+wrk.headers["Content-Type"] = "application/json"
+
+math.randomseed(os.time() + os.getpid())
+
+-- A small pool of pre-built JSON bodies. Building one fresh per request
+-- in Lua would taint the bench with Lua's GC overhead.
+local body_pool = {}
+for i = 1, 64 do
+  body_pool[i] = string.format(
+    [[{"name":"user%d","email":"u%d@example.test"}]], i, i)
+end
+
+request = function()
+  local r = math.random()
+  if r < 0.80 then
+    return wrk.format("GET", "/api/v1/users/" .. math.random(1, 10000))
+  elseif r < 0.95 then
+    return wrk.format("GET", "/api/v1/users")
+  else
+    local body = body_pool[math.random(1, #body_pool)]
+    return wrk.format("POST", "/api/v1/users", nil, body)
+  end
+end