[chore] - Update Chunk struct comment (#2317)

* update comment to include information on the importance of struct ordering

* more cute tricks

* remove cute tricks

pkg/sources/sources.go

@@ -17,6 +17,11 @@ type (
 )
 
 // Chunk contains data to be decoded and scanned along with context on where it came from.
+//
+// **Important:** The order of the fields in this struct is specifically designed to optimize
+// struct alignment and minimize memory usage. Do not change the field order without carefully considering
+// the potential impact on memory consumption.
+// Ex: https://go.dev/play/p/Azf4a7O-DhC
 type Chunk struct {
 	// Data is the data to decode and scan.
 	Data []byte

pkg/sources/sources_test.go

@@ -0,0 +1,14 @@
+package sources
+
+import (
+	"testing"
+	"unsafe"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestChunkSize ensures that the Chunk struct does not exceed 80 bytes.
+func TestChunkSize(t *testing.T) {
+	t.Parallel()
+	assert.Equal(t, unsafe.Sizeof(Chunk{}), uintptr(80), "Chunk struct size exceeds 80 bytes")
+}