feat: add profiling recipes

internal/server/server.go

@@ -7,6 +7,7 @@ import (
 	"mal/internal/config"
 	"mal/internal/observability"
 	"net/http"
+	_ "net/http/pprof" // register pprof handlers on http.DefaultServeMux
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -31,6 +32,8 @@ func ProvideRouter(cfg config.Config, htmlRender render.HTMLRender, metrics *obs
 	r.Static("/static", "./static")
 	r.Static("/dist", "./dist")
 	r.GET("/metrics", gin.WrapH(metrics.Handler()))
+	r.GET("/debug/pprof", gin.WrapH(http.DefaultServeMux))
+	r.GET("/debug/pprof/*action", gin.WrapH(http.DefaultServeMux))
 	r.HTMLRender = htmlRender
 	return r
 }

internal/server/server_test.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"io"
 	"log"
+	"mal/internal/config"
 	"mal/internal/observability"
 	"net/http"
 	"net/http/httptest"
@@ -35,6 +36,23 @@ func TestNewHTTPServer_TimeoutsAndAddr(t *testing.T) {
 	}
 }
 
+func TestProvideRouterRegistersPprof(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	router := ProvideRouter(config.Config{GinMode: gin.TestMode}, nil, observability.NewMetrics())
+	req := httptest.NewRequestWithContext(context.Background(), http.MethodGet, "/debug/pprof/", nil)
+	rec := httptest.NewRecorder()
+
+	router.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("pprof status = %d, want %d", rec.Code, http.StatusOK)
+	}
+	if !strings.Contains(rec.Body.String(), "Types of profiles available") {
+		t.Fatalf("pprof index missing profile list: %s", rec.Body.String())
+	}
+}
+
 func TestRequestLoggerUsesMatchedRoute(t *testing.T) {
 	gin.SetMode(gin.TestMode)
 

justfile

@@ -16,6 +16,12 @@ lint-go:
 test:
     go test ./...
 
+bench:
+    go test -bench=. -benchmem -count=5 ./internal/anime/... ./integrations/jikan/... ./internal/playback/...
+
+bench-all:
+    go test -bench=. -benchmem ./...
+
 build-go:
     @go build -o server ./cmd/server