all: add benchmarks to core components (#493)

Fixes #480

types/benchmark_test.go

@@ -0,0 +1,17 @@
+package types
+
+import (
+	"fmt"
+	"testing"
+)
+
+func BenchmarkParseChainID(b *testing.B) {
+	b.ReportAllocs()
+	// Start at 1, for valid EIP155, see regexEIP155 variable.
+	for i := 1; i < b.N; i++ {
+		chainID := fmt.Sprintf("ethermint_1-%d", i)
+		if _, err := ParseChainID(chainID); err != nil {
+			b.Fatal(err)
+		}
+	}
+}