improve GOOS=tamago test coverage

Author: abarisani

src/encoding/gob/codec_test.go

@@ -11,6 +11,7 @@ import (
 	"math"
 	"math/rand"
 	"reflect"
+	"runtime"
 	"strings"
 	"testing"
 	"time"
@@ -1566,6 +1567,10 @@ func testEncodeDecode(t *testing.T, in, out any) {
 }
 
 func TestLargeSlice(t *testing.T) {
+	if runtime.GOOS == "tamago" {
+		t.Skip("test requires significant memory")
+	}
+
 	t.Run("byte", func(t *testing.T) {
 		if unsafe.Sizeof(uintptr(0)) > 4 {
 			t.Parallel() // Only run in parallel in a large address space