all: add benchmarks to core components (#493)

Fixes #480

app/benchmark_test.go

@@ -0,0 +1,44 @@
+package app
+
+import (
+	"encoding/json"
+	"io"
+	"testing"
+
+	"github.com/cosmos/cosmos-sdk/simapp"
+	abci "github.com/tendermint/tendermint/abci/types"
+	"github.com/tendermint/tendermint/libs/log"
+	dbm "github.com/tendermint/tm-db"
+	"github.com/tharsis/ethermint/encoding"
+)
+
+func BenchmarkEthermintApp_ExportAppStateAndValidators(b *testing.B) {
+	db := dbm.NewMemDB()
+	app := NewEthermintApp(log.NewTMLogger(io.Discard), db, nil, true, map[int64]bool{}, DefaultNodeHome, 0, encoding.MakeConfig(ModuleBasics), simapp.EmptyAppOptions{})
+
+	genesisState := NewDefaultGenesisState()
+	stateBytes, err := json.MarshalIndent(genesisState, "", "  ")
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	// Initialize the chain
+	app.InitChain(
+		abci.RequestInitChain{
+			ChainId:       "ethermint_9000-1",
+			Validators:    []abci.ValidatorUpdate{},
+			AppStateBytes: stateBytes,
+		},
+	)
+	app.Commit()
+
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		// Making a new app object with the db, so that initchain hasn't been called
+		app2 := NewEthermintApp(log.NewTMLogger(log.NewSyncWriter(io.Discard)), db, nil, true, map[int64]bool{}, DefaultNodeHome, 0, encoding.MakeConfig(ModuleBasics), simapp.EmptyAppOptions{})
+		if _, err := app2.ExportAppStateAndValidators(false, []string{}); err != nil {
+			b.Fatal(err)
+		}
+	}
+}