fix: parallelise tests in core

cmd/geth/consolecmd.go

@@ -74,8 +74,8 @@ JavaScript API. See https://geth.ethereum.org/docs/interacting-with-geth/javascr
 func localConsole(ctx *cli.Context) error {
 	// Create and start the node based on the CLI flags
 	prepare(ctx)
-	stack := makeFullNode(ctx)
-	startNode(ctx, stack, true)
+	stack, backend := makeFullNode(ctx)
+	startNode(ctx, stack, backend, true)
 	defer stack.Close()
 
 	// Attach to the newly started node and create the JavaScript console.

core/blockchain_repair_test.go

@@ -1756,6 +1756,7 @@ func testLongReorgedSnapSyncingDeepRepair(t *testing.T, snapshots bool) {
 }
 
 func testRepair(t *testing.T, tt *rewindTest, snapshots bool) {
+	t.Parallel()
 	for _, scheme := range []string{rawdb.HashScheme, rawdb.PathScheme} {
 		testRepairWithScheme(t, tt, snapshots, scheme)
 	}

core/blockchain_snapshot_test.go

@@ -530,6 +530,8 @@ func TestLowCommitCrashWithNewSnapshot(t *testing.T) {
 	// Expected head fast block: C8
 	// Expected head block     : C2
 	// Expected snapshot disk  : C4
+
+	t.Parallel()
 	for _, scheme := range []string{rawdb.HashScheme, rawdb.PathScheme} {
 		test := &crashSnapshotTest{
 			snapshotTestBasic{
@@ -572,6 +574,8 @@ func TestHighCommitCrashWithNewSnapshot(t *testing.T) {
 	// Expected head fast block: C8
 	// Expected head block     : G
 	// Expected snapshot disk  : C4
+
+	t.Parallel()
 	for _, scheme := range []string{rawdb.HashScheme, rawdb.PathScheme} {
 		expHead := uint64(0)
 		if scheme == rawdb.PathScheme {

eth/filters/filter_system.go

@@ -187,7 +187,7 @@ const (
 	rmLogsChanSize = 10
 	// logsChanSize is the size of channel listening to LogsEvent.
 	// Updated to fix TestEth2NeBlock testcase, as the feed was unable to send
-	// logs to the channel. check - @anshalshukla
+	// logs to the channel. todo: @anshalshukla
 	logsChanSize = 100
 	// chainEvChanSize is the size of channel listening to ChainEvent.
 	chainEvChanSize = 10