feat: add protobuf message compression and decompression for Redis; refactor product fetching logic

cmd/test/slice_ptrs_test.go

@@ -0,0 +1,112 @@
+package main
+
+import (
+	"testing"
+	"unsafe"
+)
+
+// Большая структура для теста
+type BigStruct struct {
+	A, B, C, D, E, F, G, H, I, J float64
+}
+
+// Обычные функции для слайсов структур
+func ToPtrsStruct(s []BigStruct) []*BigStruct {
+	res := make([]*BigStruct, len(s))
+	for i := range s {
+		res[i] = &s[i]
+	}
+	return res
+}
+
+func DerefSliceStruct(s []*BigStruct) []BigStruct {
+	res := make([]BigStruct, len(s))
+	for i := range s {
+		if s[i] != nil {
+			res[i] = *s[i]
+		}
+	}
+	return res
+}
+
+// Unsafe версии
+func ToPtrsStructUnsafe(s []BigStruct) []*BigStruct {
+	n := len(s)
+	res := make([]*BigStruct, n)
+	if n == 0 {
+		return res
+	}
+	base := unsafe.Pointer(&s[0])
+	size := unsafe.Sizeof(s[0])
+	for i := 0; i < n; i++ {
+		res[i] = (*BigStruct)(unsafe.Pointer(uintptr(base) + uintptr(i)*size))
+	}
+	return res
+}
+
+func DerefSliceStructUnsafe(s []*BigStruct) []BigStruct {
+	n := len(s)
+	res := make([]BigStruct, n)
+	if n == 0 {
+		return res
+	}
+	baseDst := unsafe.Pointer(&res[0])
+	size := unsafe.Sizeof(res[0])
+	for i := 0; i < n; i++ {
+		src := unsafe.Pointer(s[i])
+		dst := unsafe.Pointer(uintptr(baseDst) + uintptr(i)*size)
+		*(*BigStruct)(dst) = *(*BigStruct)(src)
+	}
+	return res
+}
+
+// === Бенчмарки ===
+func BenchmarkToPtrsStruct(b *testing.B) {
+	data := make([]BigStruct, 1_000_000)
+	for i := range data {
+		data[i] = BigStruct{float64(i), float64(i), float64(i), float64(i),
+			float64(i), float64(i), float64(i), float64(i), float64(i), float64(i)}
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = ToPtrsStruct(data)
+	}
+}
+
+func BenchmarkToPtrsStructUnsafe(b *testing.B) {
+	data := make([]BigStruct, 1_000_000)
+	for i := range data {
+		data[i] = BigStruct{float64(i), float64(i), float64(i), float64(i),
+			float64(i), float64(i), float64(i), float64(i), float64(i), float64(i)}
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = ToPtrsStructUnsafe(data)
+	}
+}
+
+func BenchmarkDerefSliceStruct(b *testing.B) {
+	data := make([]BigStruct, 1_000_000)
+	for i := range data {
+		data[i] = BigStruct{float64(i), float64(i), float64(i), float64(i),
+			float64(i), float64(i), float64(i), float64(i), float64(i), float64(i)}
+	}
+	ptrs := ToPtrsStruct(data)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = DerefSliceStruct(ptrs)
+	}
+}
+
+func BenchmarkDerefSliceStructUnsafe(b *testing.B) {
+	data := make([]BigStruct, 1_000_000)
+	for i := range data {
+		data[i] = BigStruct{float64(i), float64(i), float64(i), float64(i),
+			float64(i), float64(i), float64(i), float64(i), float64(i), float64(i)}
+	}
+	ptrs := ToPtrsStruct(data)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = DerefSliceStructUnsafe(ptrs)
+	}
+}