Add performance benchmarks, stress tests, and frontend perf tests

Go benchmarks cover item CRUD/filter/sanitization, API endpoints (stream,
item update, feed list), middleware stack (gzip, security headers, CSRF),
and crawler pipeline (feed parsing, mocked crawl). Stress tests verify
concurrent reads/writes and large dataset handling. Frontend perf tests
measure template generation, DOM insertion, and store event throughput.

New Makefile targets: bench, bench-short, stress, test-perf.

https://claude.ai/code/session_01ChDVWFDrQoFjMYHpaLGr9s

1 files changed, 133 insertions, 0 deletions

diff --git a/api/api_bench_test.go b/api/api_bench_test.go
new file mode 100644
index 0000000..0018afe
--- /dev/null
+++ b/api/api_bench_test.go
@@ -0,0 +1,133 @@
+package api
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"strconv"
+	"testing"
+
+	"adammathes.com/neko/config"
+	"adammathes.com/neko/models"
+	"adammathes.com/neko/models/feed"
+	"adammathes.com/neko/models/item"
+)
+
+func setupBenchDB(b *testing.B) {
+	b.Helper()
+	testMu.Lock()
+	config.Config.DBFile = filepath.Join(b.TempDir(), "bench.db")
+	models.InitDB()
+	b.Cleanup(func() {
+		if models.DB != nil {
+			models.DB.Close()
+		}
+		testMu.Unlock()
+	})
+}
+
+func seedBenchData(b *testing.B, count int) {
+	b.Helper()
+	f := &feed.Feed{Url: "http://example.com/bench", Title: "Bench Feed", Category: "tech"}
+	f.Create()
+
+	for i := 0; i < count; i++ {
+		it := &item.Item{
+			Title:       fmt.Sprintf("Bench Item %d", i),
+			Url:         fmt.Sprintf("http://example.com/bench/%d", i),
+			Description: fmt.Sprintf("<p>Description for bench item %d with <b>HTML</b></p>", i),
+			PublishDate: "2024-01-01 00:00:00",
+			FeedId:      f.Id,
+		}
+		_ = it.Create()
+	}
+}
+
+func BenchmarkHandleStream(b *testing.B) {
+	setupBenchDB(b)
+	seedBenchData(b, 15)
+	server := newTestServer()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		req := httptest.NewRequest("GET", "/stream", nil)
+		rr := httptest.NewRecorder()
+		server.ServeHTTP(rr, req)
+		if rr.Code != http.StatusOK {
+			b.Fatalf("expected 200, got %d", rr.Code)
+		}
+	}
+}
+
+func BenchmarkHandleStreamWithSearch(b *testing.B) {
+	setupBenchDB(b)
+	seedBenchData(b, 50)
+	server := newTestServer()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		req := httptest.NewRequest("GET", "/stream?q=Bench", nil)
+		rr := httptest.NewRecorder()
+		server.ServeHTTP(rr, req)
+		if rr.Code != http.StatusOK {
+			b.Fatalf("expected 200, got %d", rr.Code)
+		}
+	}
+}
+
+func BenchmarkHandleItemUpdate(b *testing.B) {
+	setupBenchDB(b)
+	seedBenchData(b, 1)
+	server := newTestServer()
+
+	// Get the item ID
+	items, _ := item.Filter(0, nil, "", false, false, 0, "")
+	if len(items) == 0 {
+		b.Fatal("no items seeded")
+	}
+	itemID := items[0].Id
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		read := i%2 == 0
+		body, _ := json.Marshal(item.Item{
+			Id:        itemID,
+			ReadState: read,
+		})
+		req := httptest.NewRequest("PUT", "/item/"+strconv.FormatInt(itemID, 10), bytes.NewBuffer(body))
+		rr := httptest.NewRecorder()
+		server.ServeHTTP(rr, req)
+		if rr.Code != http.StatusOK {
+			b.Fatalf("expected 200, got %d", rr.Code)
+		}
+	}
+}
+
+func BenchmarkHandleFeedList(b *testing.B) {
+	setupBenchDB(b)
+
+	// Create several feeds
+	for i := 0; i < 10; i++ {
+		f := &feed.Feed{
+			Url:      fmt.Sprintf("http://example.com/feed/%d", i),
+			Title:    fmt.Sprintf("Feed %d", i),
+			Category: "tech",
+		}
+		f.Create()
+	}
+
+	server := newTestServer()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		req := httptest.NewRequest("GET", "/feed", nil)
+		rr := httptest.NewRecorder()
+		server.ServeHTTP(rr, req)
+		if rr.Code != http.StatusOK {
+			b.Fatalf("expected 200, got %d", rr.Code)
+		}
+	}
+}